C, max.	Mn	P, max	S, max	Si, min	Cr, max	Cu, max	Mo, max	Ni, max	V, max
Grade A *	0.25	0.27 – 0.93	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08
Grade B	0.30	0.29 – 1.06	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08
Grade C	0.35	0.29 – 1.06	0.035	0.035	0.10	0.40	0.40	0.15	0.40	0.08

*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%.

 Mechanical Properties                                

Grade A          Grade B          Grade C

Tensile strength, min, psi (MPa)                  48,000 (330)    60000 (415)     70,000 (485)

Yield strength, min, psi (MPa)                     30,000 (205)    35,000 (240)    40,000 (275)

 

A53 Grade

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	Grade	C, max	Mn, max	P, max	S, max	Cu*, max	Ni*, max	Cr*, max	Mo*, max	V*, max
Type S(Seamless)	A	0.25	0.95	0.05	0.05	0.40	0.40	0.40	0.15	0.08
	B	0.30	1.20	0.05	0.05	0.40	0.40	0.40	0.15	0.08
Type E (Electric-resistance Welded)	A	0.25	0.95	0.05	0.05	0.40	0.40	0.40	0.15	0.08
	B	0.30	1.20	0.05	0.05	0.40	0.40	0.40	0.15	0.08
Type F (Furnace-welded)	A	0.30	1.20	0.05	0.05	0.40	0.40	0.40	0.15	0.08

*The total composition for these five elements shall not exceed 1.00%

Mechanical Properties

Grade A                     Grade B                     

Tensile Strength, min., psi, (MPa)                   48,000 (330)                60,000 (415)

Yield Strength, min., psi, (MPa)                     30,000 (205)                35,000 (240)

 

ASTM A333

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	C	Mn	P	S	Si	Cr	Cu	Mo	Ni	Cb	V
Grade 1:	0.30	0.40-1.06	0.025	0.025	–	–	–	–	–	–	–
(Note:  This is similar chemistry to A53/SA53)
Grade 6:	0.30	0.29-1.06	0.025	0.025	0.10 min	0.30	0.40	0.12	0.40	0.12, max	0.08 max

(Note:  This is similar chemistry to A106/SA106)

Mechanical Properties:                                             Grade 1                                  Grade 6                     

Tensile Strength, min, psi (MPa)                             55,000 (380)                60,000 (415)    

Yield Strength, min, psi (MPa)                                30,000 (205)                35,000 (240)

CVN Impact (Charpy) Test: 

Minimum Impact Test Temperature

Grade 1                       -50 (F)             -45 (C)

Grade 6                       -50 (F)             -45 (C)

Heat Treatment:

Grades 1 and 6 shall be heat treated to control their microstructure.

 

API 5L

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 Mechanical Properties        

                                                                        API 5L PSL-1 X52                API 5L PSL-2 X52

Tensile strength, min /max, psi (MPa)         66,700(460)/ n/a66,700 / 110,200

Yield strength, min /max, psi (MPa)            52,000 (300)/n/a          52,000 / 76,900

1. a.      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 B, but < X52; up to a maximum of 1.75% for grades >X52, but <X70; and up to a maximum of 2.00% for grade X70
2. b.      The sum of the niobium, vanadium, and titanium concentrations shall be < 0.06%.
3. c.       Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium, and 0.12% maximum for molybdenum.

Select differences between PSL 1 and PSL 2:

	PSL1	PSL2
CVN impact (Charpy) testing	None required	Required for all grades
Nondestructive inspection of seamless	Only when purchaser specifies   SR4	SR4 mandatory
Certification	Certificates when specified per SR15	Certificates (SR 15.1) mandatory
Traceability	Traceable only until all tests are passed, unless SR15 is specified	Traceable after completion of tests (SR 15.2) mandatory
Hydrostatic Test	Required	Required