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Carbon Steel Pipes & Tubes

We have a large scale unit engaged in stocking and exporting carbon steel tubes, carbon steel pipes and carbon steel welded pipes, carbon steel welded tubes and electrogalvanized steel tubes/pipes. we supply for engineering purpose, ERW pipes for water, gas & sewerage, carbon steel tubes for idlers of belt conveyors, water wells and lancing pipes for various automotive & industrial applications

Carbon Steel Pipes & Tubes
Carbon Steel Pipes & Tubes


Applications
Carbon Steel is used in the most critical engineering applications and also in certain applications in the automotive sector. In addition, some of the value-added Carbon Steel products include steel for LPG cylinders, API grade, corrosion resistant steel, critical structural application steel, boiler quality, auto grades, precision tubes and medium/high carbon grades, among others.

Carbon Products
A53 A106 API5L Grade B/C X42 Seamless Pipe
Size Range : 1/8" - 26"
Schedules : 20, 30, 40, Standard (STD), Extra Heavy (XH), 80, 100, 120, 140, 160, XXH
Grades : ASTM A53 Gr B, ASME SA53 Gr B, API-5L Gr B, ASTM A106 Gr B, ASME SA106 Gr B, ASTM A106 Gr C, PSL 1 and PSL2

API5L X-42 X-52 X-60 Seamless Pipe
Size Range : 2" - 24"
Schedules : Standard (STD), Extra Heavy (XH), 100, 120, 160, XXH
Grades : PSL1 and PSL2

A333 (Low Temp) Grade 1/6 Carbon Steel Seamless Pipe
Size Range : 1/2" - 24"
Schedules : Standard (STD), Extra Heavy (XH), 100, 120, 160, XXH

A53 API5L Grade B X-42 X-52 X-60 ERW (Electric Resistance Welded) Pipe
Size Ranges : 2" - 24"
Schedules : 10, 20, Standard (STD), Extra Heavy (XH)
Non-Schedules : .120wall, .156wall, .188wall, .203 wall, .219wall etc.
Grades : API-5L Gr B, API-5L Gr X42, API-5L Gr X52, API-5L Gr X60, API-5L Gr X65PSL1 and PSL2

API5L Grade B X-42 X-52 X-60 DSAW/SAW
Size Ranges : 26" - 60"
Schedules : 20, Std, XH, 30,
Grades : API-5L Gr B, API-5L Gr X42, API-5L Gr X52, API-5L Gr X60, API-5L Gr X65PSL1 and PSL2

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ASTM A333 Grade 6



MECHANICAL REQUIREMENTS
ELEMENT COMPOSITION, %
C, Max 0.30
Mn 0.29-1.06
P,Max 0.03
S, Max 0.03
Si, Min Si, Min
A For each reduction of 0.01% carbon below 0.30%, an increase of 0.05% manganese above 1.06% would be permitted to a maximum of 1.35% manganese.





TENSILE REQUIREMENTS
ELONGATION
psi Mpa L T
Y.S,min 35 000 240 22 12
T.S,min 60 000 415





Stress Relieving of Test Pieces
Metal Temperature
°F °C
5 600
1050 565
1000 540




ASTM A106 Grade B & GRADE C



CHEMICAL REQUIREMENTS
ELEMENT COMPOSITION, %
ASTM A106 Gr.B ASTM A106 Gr.C
C maxA 0.30 0.35
Mn 0.29-1.06 0.29-1.06
P, max 0.04 0.04
S, max 0.04 0.04
Si, min 0.10 0.10
Cr, maxB 0.40 0.40
Cu, maxB 0.40 0.40
Mo, maxB 0.15 0.15
Ni, maxB 0.40 0.40
V, maxB 0.08 0.08
A) For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%.
B) These five elements combined shall not exceed 1%.


Tensile Requirements
ASTM A106 Gr.B ASTM A106 Gr.C
Y.S, min, psi[Mpa] 35 000 [240] 40 000 [275]
T.S., min, psi[Mpa] 60 000 [415] 70 000 [485]


ELONGATION
ASTM A106 Gr.B ASTM A106 Gr.C
L T L T
22 12 20 12



PSL1

API 5L 245 OR GR.B


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis a
SEAMLESS PIPE
C Mn P S V Nb Ti
maxb max.b min. max. max. max. max. max.
0.28 1.20 - 0.030 0.030 c,d c,d d
WELDED PIPE
0.26 1.20 - 0.030 0.030 c,d c,d d
a 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and
0.15% maximum for molybdenum. For grades up to and including L360/X52, Cu,
Cr and Ni shall not be added intentionally.
b For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.
c Unless otherwise agreed, the sum of the niobium and vanadium contents shall be = 0.06%.
d The sum of the niobium ,vanadium and titanium concentrations shall be = 0.15%.

MECHANICAL REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa T.Sa ELONGATION Tensile Strengthb
Mpa(psi) Mpa(psi) Mpa(psi)
min min min min
245(35 500) 415(60 200) 28% 415 (60 200)
a For intermediate grades, the differencec between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
b For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a)



API 5L 290 OR X 42


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis a
SEAMLESS PIPE
C Mn P S V Nb Ti
maxb max.b min. max. max. max. max. max.
0.28 1.30 - 0.030 0.030 d d d
WELDED PIPE
0.26 1.30 - 0.030 0.030 d d d
a 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum for molybdenum. For grades up to and including L360/X52, Cu, Cr and Ni shall not be added intentionally.
b For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.
d The sum of the niobium ,vanadium and titanium concentrations shall be = 0.15%.

MECHANICAL REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa T.Sa ELONGATION Tensile Strengthb
Mpa(psi) Mpa(psi) Mpa(psi)
min min min min
290(42 100) 415(60 200) c 415 (60 200)
a For intermediate grades, the difference between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
b For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a)
c The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as determined using the following equation:
Equation



API 5L 390 OR X 56


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis a
SEAMLESS PIPE
C Mn P S V Nb Ti
maxb max.b min. max. max. max. max. max.
0.28 1.40 - 0.030 0.030 d d d
WELDED PIPE
0.26 1.40 - 0.030 0.030 d d d
a 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum for molybdenum. For grades up to and including L360/X52, Cu, Cr and Ni shall not be added intentionally.
b For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.
d The sum of the niobium ,vanadium and titanium concentrations shall be = 0.15%.

MECHANICAL REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa T.Sa ELONGATION Tensile Strengthb
Mpa(psi) Mpa(psi) Mpa(psi)
min min min min
390(56 600) 490(71 100) c 490 (71 100)
a For intermediate grades, the differencec between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
b For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a)
c The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as determined using the following equation:
Equation



API 5L 415 OR X60


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis a
SEAMLESS PIPE
C Mn P S V Nb Ti
maxb max.b min. max. max. max. max. max.
0.28e 1.40e - 0.030 0.030 f f f
WELDED PIPE
0.26e 1.40e - 0.030 0.030 f f f
a 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum for molybdenum. For grades up to and including L360/X52, Cu, Cr and Ni shall not be added intentionally.
b For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.
e Unless otherwise agreed.
f Unless otherwise agreed, the sum of niobium, vanadium and titanium concentrations shall be = 0.15%.

MECHANICAL REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa T.Sa ELONGATION Tensile Strengthb
Mpa(psi) Mpa(psi) Mpa(psi)
min min min min
415(60 200) 520(75 400) c 520 (75 400)
a For intermediate grades, the differencec between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
b For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a)
c The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as determined using the following equation:
Equation



API 5L450 OR X65


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis a
SEAMLESS PIPE
C Mn P S V Nb Ti
maxb max.b min. max. max. max. max. max.
0.28e 1.40e - 0.030 0.030 f f f
WELDED PIPE
0.26 1.45e - 0.030 0.030 f f f
a 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum for molybdenum. For grades up to and including L360/X52, Cu, Cr and Ni shall not be added intentionally.
b For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.
e Unless otherwise agreed.
f Unless otherwise agreed, the sum of niobium, vanadium and titanium concentrations shall be = 0.15%.

MECHANICAL REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa T.Sa ELONGATION Tensile Strengthb
Mpa(psi) Mpa(psi) Mpa(psi)
min min min min
450(65 300) 535(77 600) c 535 (77 600)
a For intermediate grades, the differencec between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
b For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a)
c The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as determined using the following equation:
Equation



API 5L 485 OR X70


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis a
SEAMLESS PIPE
C Mn P S V Nb Ti
maxb max.b min. max. max. max. max. max.
0.28e 1.40e - 0.030 0.030 f f f
WELDED PIPE
0.26e 1.65e - 0.030 0.030 f f f
a 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum for molybdenum. For grades up to and including L360/X52, Cu, Cr and Ni shall not be added intentionally.
b For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70.
e Unless otherwise agreed.
f Unless otherwise agreed, the sum of niobium, vanadium and titanium concentrations shall be = 0.15%.

MECHANICAL REQUIREMENTS
Weld seam of EW, SAW and COW pipes
Y.Sa T.Sa ELONGATION Tensile Strengthb
Mpa(psi) Mpa(psi) Mpa(psi)
min min min min
485(70 300) 570(82 700) c 570 (82 700)
a For intermediate grades, the differencec between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade.
b For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a)
c The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as determined using the following equation:
Equation



PSL2

API 5L 245 OR B


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis % maximum CARBON EQUIVALENT a
% MAXIMUM
PIPE GRADE Cb Si Mnb P S V Nb Ti Other CEIIW CEPcm
SEAMLESS & WELDED PIPES
L245R OR BR 0.24 0.40 1.2 0.03 0.02 c c 0.04 e 0.43 0.25
L245Q OR BQ 0.18 0.45 1.4 0.03 0.02 0.05 0.05 0.04 e 0.43 0.25
WELDED PIPE
L245M OR BM 0.22 0.45 1.2 0.03 0.02 0.05 0.05 0.04 e 0.43 0.25
a Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm limits apply if the carbon mass fraction is less than or equal to 0.12%.
b For each reduction of 0.01% below the specified maximum for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B
c unless otherwise agreed, the sum of th niobium & vanadium concentrations shall be = 0.06%
e Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium, & 0.15% maximum for molybdenum.
CEIIW C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5)
CEPcm C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B

MECHANICAL REQUIREMENTS
weld seam of HFW, SAW and COW pipes
Y.Sa T.Sa Ratio a,b,c Elongation Tensile strength d
Mpa(psi) Mpa(psi) Af Mpa(psi)
min max min max max min min
245(35 500) 450e (65 300)e 415 (60 200) 760 (110 200) 0.93 f 415 (60 200)
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi.
b For grades > L625 or X90, Rp0,2 applies.
c This limit applies for pipe with D > 323,9 mm (12.750 in).
d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).
e For pipe with D< 219,1 mm (8.625 in), the maximum yield strength shall be = 495 Mpa (71 800 psi).
f The specified munimum elongation, Af, shall be as determined using the following equation:
Equation



API 5L 290 OR X 42


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis % maximum CARBON EQUIVALENT a
% MAXIMUM
Cb Si Mnb P S V Nb Ti Other CEIIW CEPcm
SEAMLESS & WELDED PIPES
0.24 0.4 1.2 0.03 0.02 0.06 0.05 0.04 e 0.43 0.25
0.18 0.45 1.4 0.03 0.02 0.05 0.05 0.04 e 0.43 0.25
WELDED PIPE
0.22 0.45 1.3 0.03 0.02 0.05 0.05 0.04 e 0.43 0.25
a Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm limits apply if the carbon mass fraction is less than or equal to 0.12%.
b For each reduction of 0.01% below the specified maximum for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B
e Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium,
CEIIW C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5)
CEPcm C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B

MECHANICAL REQUIREMENTS
weld seam of HFW, SAW and COW pipes
Y.Sa T.Sa Ratio a,b,c Elongation Tensile strength d
Mpa(psi) Mpa(psi) Af Mpa(psi)
min max min max max min min
290(42 100) 495 (71 800) 415 (60 200) 760 (110 200) 0.93 f 415 (60 200)
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi.
b For grades > L625 or X90, Rp0,2 applies.
c This limit applies for pipe with D > 323,9 mm (12.750 in).
d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).
f The specified munimum elongation, Af, shall be as determined using the following equation:
Equation



API 5L 390 OR X 56


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis % maximum CARBON EQUIVALENT a
% MAXIMUM
Cb Si Mnb P S V Nb Ti Other CEIIW CEPcm
SEAMLESS & WELDED PIPES
0.24 0.45 1.4 0.03 0.02 0.10 f 0.05 0.04 d,e 0.43 0.25
0.18 0.45 1.5 0.03 0.02 0.07 0.05 0.04 d,e 0.43 0.25
WELDED PIPE
0.22 0.45 1.4 0.03 0.02 d d d e 0.43 0.25
a Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm limits apply if the carbon mass fraction is less than or equal to 0.12%.
b For each reduction of 0.01% below the specified maximum for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B
d the sum of the niobium & vanadium & titanium concentrations shall be =0.15%
e Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium, & 0.15% maximum for molybdenum.
f Unless otherwise agreed
CEIIW C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5)
CEPcm C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B

MECHANICAL REQUIREMENTS
weld seam of HFW, SAW and COW pipes
Y.Sa T.Sa Ratio a,b,c Elongation Tensile strength d
Mpa(psi) Mpa(psi) Af Mpa(psi)
min max min max max min min
390(56 600) 545 (79 000) 490 (71 100) 760 (110 200) 0.93 f 490 (71 100)
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi.
b For grades > L625 or X90, Rp0,2 applies.
c This limit applies for pipe with D > 323,9 mm (12.750 in).
d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).
f The specified munimum elongation, Af, shall be as determined using the following equation:
Equation



API 5L 415 OR X60


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis % maximum CARBON EQUIVALENT a
% MAXIMUM
Cb Si Mnb P S V Nb Ti Other CEIIW CEPcm
SEAMLESS & WELDED PIPES
0.24f 0.45f 1.4f 0.03 0.02 0.10 f 0.05f 0.04f g,h as agreed
0.18f 0.45f 1.7f 0.03 0.02 g g g h 0.43 0.25
WELDED PIPE
0.12f 0.45f 1.6f 0.03 0.02 g g g h 0.43 0.25
a Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm limits apply if the carbon mass fraction is less than or equal to 0.12%.
b For each reduction of 0.01% below the specified maximum for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B
f Unless otherwise agreed
g Unless otherwise agreed the sum of the niobium, vanadium & titanium concentrations shall be =0.15%
h Unless otherwise agreed, 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, & 0.50% maximum for molybdenum.
CEIIW C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5)
CEPcm C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B

MECHANICAL REQUIREMENTS
weld seam of HFW, SAW and COW pipes
Y.Sa T.Sa Ratio a,b,c Elongation Tensile strength d
Mpa(psi) Mpa(psi) Af Mpa(psi)
min max min max max min min
415(60 200) 565 (81 900) 520 (75 400) 760 (110 200) 0.93 f 520 (75 400)
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi.
b For grades > L625 or X90, Rp0,2 applies.
c This limit applies for pipe with D > 323,9 mm (12.750 in).
d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).
f The specified munimum elongation, Af, shall be as determined using the following equation:
Equation



API 5L 450 OR X 65


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis % maximum
Cb Si Mnb P S V Nb
SEAMLESS & WELDED PIPES
0.18f 0.45f 1.7f 0.03 0.02 g g
WELDED PIPE
0.12f 0.45f 1.6f 0.03 0.02 g g
a Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm limits apply if the carbon mass fraction is less than or equal to 0.12%.
b For each reduction of 0.01% below the specified maximum for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B
f Unless otherwise agreed
g Unless otherwise agreed the sum of the niobium, vanadium & titanium concentrations shall be =0.15%
h Unless otherwise agreed, 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, & 0.50% maximum for molybdenum.
CEIIW C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5)
CEPcm C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B

MECHANICAL REQUIREMENTS
weld seam of HFW, SAW and COW pipes
Y.Sa T.Sa Ratio a,b,c Elongation Tensile strength d
Mpa(psi) Mpa(psi) Af Mpa(psi)
min max min max max min min
450(65 300) 600 (87 000) 535 (77 600) 760 (110 200) 0.93 f 535 (77 600)
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi.
b For grades > L625 or X90, Rp0,2 applies.
c This limit applies for pipe with D > 323,9 mm (12.750 in).
d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).
f The specified munimum elongation, Af, shall be as determined using the following equation:
Equation



API 5L 485 OR X70


CHEMICAL COMPOSITION
Mass fraction, based upon heat and product analysis % maximum CARBON EQUIVALENT a
% MAXIMUM
Cb Si Mnb P S V Nb Ti Other CEIIW CEPcm
SEAMLESS & WELDED PIPES
0.18f 0.45f 1.8f 0.03 0.02 g g g h 0.43 0.25
WELDED PIPE
0.12f 0.45f 1.7f 0.03 0.02 g g g h 0.43f 0.25
a Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm limits apply if the carbon mass fraction is less than or equal to 0.12%.
b For each reduction of 0.01% below the specified maximum for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B
f Unless otherwise agreed
g Unless otherwise agreed the sum of the niobium, vanadium & titanium concentrations shall be =0.15%
h Unless otherwise agreed, 0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, & 0.50% maximum for molybdenum.
CEIIW C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5)
CEPcm C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B

MECHANICAL REQUIREMENTS
weld seam of HFW, SAW and COW pipes
Y.Sa T.Sa Ratio a,b,c Elongation Tensile strength d
Mpa(psi) Mpa(psi) Af Mpa(psi)
min max min max max min min
485(70 300) 635 (92 100) 570 (82 700) 760 (110 200) 0.93 f 570 (82 700)
a For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi.
b For grades > L625 or X90, Rp0,2 applies.
c This limit applies for pipe with D > 323,9 mm (12.750 in).
d For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a).
f The specified munimum elongation, Af, shall be as determined using the following equation:
Equation



Specified outside  Full-size CVN absorbed energy,
diameter minimum
D Kv
mm (in) J (ft.lbf)
Grade
= L415 or > L415 0r X60 > L450 or X65 > L485 or X70 > L555 or X80 > L625 or X90 > L690 or X100
X60 = L450 or X65 = L485 or X70 = L555 or X80 = L625 or X90 = L690 or X100 = L830 or X120
=508 (20. 000) 27 (20) 27 (20) 27 (20) 40 (30) 40 (30) 40 (30) 40 (30)
>508 (20.000) to 27 (20) 27 (20) 27 (20) 40 (30) 40 (30) 40 (30) 40 (30)
=762 (30.000)
>762 (30.000) to 40 (30) 40 (30) 40 (30) 40 (30) 40 (30) 54 (40) 54 (40)
=914 (36.000)
>914 (36.000) to 40 (30) 40 (30) 40 (30) 40 (30) 40 (30) 54 (40) 68 (50)
=1 219 (48.000)
>1 219 (48.000) to 40 (30) 54 (40) 54 (40) 54 (40) 54 (40) 68 (50) 81 (60)
=1 422 (56.000)
>1 422 (56.000) to 40 (30) 54 (40) 68 (50) 68 (50) 81 (60) 95 (70) 108 (80)
=2134 (84.000)
9.8.3 Pipe weld and HAZ tests 
The minimum average (of a set of three test pieces) absorbed energy for each pipe weld and HAZ test, based upon full-size test pieces and a test temperature of 0 °C (32 °F), or if agreed a lower test temperature, shall be
a) 27 J (20 ft.lbf) for pipe with D < 1 422 mm (56.000in) in grades = L555 or X80;
b) 40 J (30 ft.lbf) for pipe with D = 1 422 mm (56.000 in);
c) 40 J (30 ft.lbf) for pipe in grades > L555 or X80.
NOTE :The HAZ of the longitudinal seam weld in HFW welded pipe is usually too narrow to permit accurate sampling for Charpy testing. The requirement for Charpy testing of the seam weld HAZ applies only to SAWL/SAWH and COWL/COWH pipe





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