High Performance 40CR Alloy Steel Pipe - ASTM A335 Alloy Steel Seamless Pipe – Haihui

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High Performance 40CR Alloy Steel Pipe - ASTM A335 Alloy Steel Seamless Pipe – Haihui Detail:

Strong resistance to rupturing at high temperatures and high pressures.

May be used for Hydrogen Sulfide Corrosion Services.

Resistant to cracking from hydrogen attack and embrittlement.

Resistant to hot sulfide corrosion cracking.

Can be used for NACE Applications where sour environments are under high temp and pressure.

Can be used in NACE-MRO 175 Sour Service.

Ideal for creep rupture applications.

Can handle high temperatures with very low elasticity.

ASTM A335 Alloy Steel Seamless2

The types of alloy steel covered by the ASTM A335 – ASME SA335 specification are designed with a “P” prefix, from P5 to P92. Grades P11/P22 and P91/92 are typically found in power stations, whereas grade P5 and P9 are more common for application in the petrochemical industry. Grades P9, P91 are, in the list, the more expensive

ASTM A335Low-Alloy Steel(Grade)	UNS equivalent	C≤	Mn	P≤	S≤	Si≤	Cr	Mo
P1	K11522	0.10~0.20	0.30~0.80	0.025	0.025	0.10~0.50	–	0.44~0.65
P2	K11547	0.10~0.20	0.30~0.61	0.025	0.025	0.10~0.30	0.50~0.81	0.44~0.65
P5	K41545	0.15	0.30~0.60	0.025	0.025	0.5	4.00~6.00	0.44~0.65
P5b	K51545	0.15	0.30~0.60	0.025	0.025	1.00~2.00	4.00~6.00	0.44~0.65
P5c	K41245	0.12	0.30~0.60	0.025	0.025	0.5	4.00~6.00	0.44~0.65
P9	S50400	0.15	0.30~0.60	0.025	0.025	0.50~1.00	8.00~10.00	0.44~0.65
P11	K11597	0.05~0.15	0.30~0.61	0.025	0.025	0.50~1.00	1.00~1.50	0.44~0.65
P12	K11562	0.05~0.15	0.30~0.60	0.025	0.025	0.5	0.80~1.25	0.44~0.65
P15	K11578	0.05~0.15	0.30~0.60	0.025	0.025	1.15~1.65	–	0.44~0.65
P21	K31545	0.05~0.15	0.30~0.60	0.025	0.025	0.5	2.65~3.35	0.80~1.60
P22	K21590	0.05~0.15	0.30~0.60	0.025	0.025	0.5	1.90~2.60	0.87~1.13
P91	K91560	0.08~0.12	0.30~0.60	0.02	0.01	0.20~0.50	8.00~9.50	0.85~1.05
P92	K92460	0.07~0.13	0.30~0.60	0.02	0.01	0.5	8.50~9.50	0.30~0.60

A335 Low-Alloy Pipe	UNS Number	Yield Strength ksi	Tensile Strength ksi	Elongation %	Hardness
A335 Low-Alloy Pipe	UNS Number	Yield Strength ksi	Tensile Strength ksi	Elongation %	Rockwell	Brinell
P1	K11522	30	55	30	–	–
P2	K11547	30	55	30	–	–
P5	K41545	40	70	30	–	207 max
P9	S50400	30	60	30	–	–
P11	K11597	30	60	20	–	–
P12	K11562	32	60	30	–	174 max
P22	K21590	30	60	30	–	–
P91	K91560	60	85	20	–	–

Alloy Steel pipe are heat treated to achieve mechanical properties as per the desired alloying element. Below are some of the types of heat treatment.

Normalize Quench and Tempering.

Quench and Tempering.

Normalizing & Hardening.

Transverse/longitudinal: tension and flattening, hardness, bend tests- for material which has been heat-treated in batch furnaces, these tests shall be made on the 5% of the pipes from each heat lot number. For smaller lots, one pipe at a minimum has to be tested.

ASTM A335 Gr. P91 shall have a hardness of 250 HB / 265 HV (25 HRC).

Hydro testing: shall be applied to every length of pipe.

The non-destructive electric test is optional.

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40CR Alloy Steel Pipe