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AISI 201 202 304L 316 ASTM A312 China manufacture

Views: 104 Author: Site Editor Publish Time: 2023-03-31 Origin: Site

Both ASTM A312 and A358 are stainless steel materials with ASTM designation having very good corrosion resistance. They are widely used materials for the piping and pipeline industry. In this article, we will find out the basic differences between ASTM A312 and ASTM A358.

What is ASTM A312?

ASTM A312 or SA 312 is an American Standard material specification that covers seamless, welded, and heavily cold-worked austenitic stainless steel pipe. ASTM A312 AISI 201 Stainless steel welded pipe,In general A312 pipes are intended for high-temperature and general corrosive service. 304/304L Stainless Steel and 316/316L Stainless Steel are the most widely used grade of A312 specification.

What is ASTM A358?

ASTM A358 or SA 358 is a material specification for electric-fusion-welded austenitic chromium-nickel stainless steel pipe. A358 stainless steel materials are widely used in high-temperature and or corrosive service industrial applications.

Applications of A312 and A358

As stainless steel pipes of Specification A312 and A358 are corrosion resistant, ASTM A312 AISI 304L Stainless steel welded pipe,they find wide applications in harsh conditions. In corrosive environments, both A358 and A312 proved their durability. Additionally, They have good low-temperature resistance capability. Because of all these, the popular industries that use A312 and/or A358 materials are:

Chemical, Petrochemical

Mining

Food and beverage

Oil and gas

Marine

Pharmaceutical

Power generation

Renewable energy

A312 vs A358: Differences

Even though both A312 and A358 represent Stainless Steel materials for piping and pipeline industries having similar compositions and applications, there are some differences between the two alloys. The following table lists the major differences between ASTM A358 and ASTM A312.

ASTM-A213-Seamless-Steel-Tube-for-Boiler-Or-Heat-exchanger3 TP-304L-316L-ASTM-A312-Stainless-Steel-Welded-Pipe

A312-304-304L-Welded-Pipe SCH-80S-Stainless-Steel-Pipe3

ASTM A312	ASTM A358
ASTM A312 materials are manufactured by Seamless without welding, Automatic Welding without filler material, or heavy cold working.	ASTM A358 materials are manufactured by fusion welding using single-welded or double-welded butt joints.
A312 Stainless Steel Seamless pipes materials have different grades and no sub-classes.	Depending on the type of welding, filler material requirement, and radiographic requirements they have 5 sub-classes within A358. They are designated as class 1 to class 5 and must be mentioned while ordering.
A312 material conforms to the requirements furnished inSpecification A999	While A358 SS pipes conform to the requirements provided in A240.
Seamless A312 SS pipes are usually costly.	A358 pipes are usually cheaper.
In general A312 pipes are manufactured for a size up to 30 inches	A358 pipes are usually manufactured up to a size of 48 inches

The table shows the chemical composition of the most common grades of stainless steel pipes under the ASTM A312-ASME SA312 specification:

STAINLESS STEEL PIPE GRADES CHART (ASTM A312)
SS Pipes Grade	UNS	C	Mn	P	S	Si	Cr	Ni	Mo
TP304	S3040	0.08	2	0.045	0.03	1	18.0-20.0	8.0-11.0
TP304L	S30403	0.035	2	0.045	0.03	1	18.0-20.0	8.0-13.0
TP304H	S30409	0.04-0.10	2	0.045	0.03	1	18.0-20.0	8.0-11.0
TP304N	S30451	0.08	2	0.045	0.03	1	18.0-20.0	8.0-18.0
TP304LN	S30453	0.035	2	0.045	0.03	1	18.0-20.0	8.0-12.0
TP309S	S30908	0.08	2	0.045	0.03	1	22.0-24.0	12.0-15.0	0.75
TP309H	S30909	0.04-0.10	2	0.045	0.03	1	22.0-24.0	12.0-15.0
TP309Cb	S30940	0.08	2	0.045	0.03	1	22.0-24.0	12.0-16.0	0.75
TP309Cb	S30940	0.08	2	0.045	0.03	1	22.0-24.0	12.0-16.0	0.75
TP309HCb	S30941	0.04-0.10	2	0.045	0.03	1	22.0-24.0	12.0-16.0	0.75
TP309HCb	S30941	0.04-0.10	2	0.045	0.03	1	22.0-24.0	12.0-16.0	0.75
TP310S	S3108	0.08	2	0.045	0.03	1	24.0-26.0	19.0-22.0	0.75
TP310H	S3109	0.04-0.10	2	0.045	0.03	1	24.0-26.0	19.0-22.0
TP310Cb	S31040	0.08	2	0.045	0.03	1	24.0-26.0	19.0-22.0	0.75
TP310Cb	S31040	0.08	2	0.045	0.03	1	24.0-26.0	19.0-22.0	0.75
TP310HCb	S31041	0.04-0.10	2	0.045	0.03	1	24.0-26.0	19.0-22.0	0.75
TP310HCb	S31041	0.04-0.10	2	0.045	0.03	1	24.0-26.0	19.0-22.0	0.75
TP316	S3160	0.08	2	0.045	0.03	1	16.0-18.0	11.0-14.0	2.0-3.0
TP316L	S31603	0.035	2	0.045	0.03	1	16.0-18.0	10.0-14.0	2.0-3.0
TP316H	S31609	0.04-0.10	2	0.045	0.03	1	16.0-18.0	11.0-14.0	2.0-3.0
TP316Ti	S31635	0.08	2	0.045	0.03	0.75	16.0-18.0	10.0-14.0	2.0-3.0


TP316N	S31651	0.08	2	0.045	0.03	1	16.0-18.0	10.0-14.0	2.0-3.0
TP316LN	S31653	0.035	2	0.045	0.03	1	16.0-18.0	11.0-14.0	2.0-3.0
TP317	S3170	0.08	2	0.045	0.03	1	18.0-20.0	10.0-14.0	3.0-4.0
TP317L	S31703	0.035	2	0.045	0.03	1	18.0-20.0	11.0-15.0	3.0-4.0
TP321	S3210	0.08	2	0.045	0.03	1	17.0-19.0	9.0-12.0
TP321H	S32109	0.04-0.10	2	0.045	0.03	1	17.0-19.0	9.0-12.0
TP347	S3470	0.08	2	0.045	0.03	1	17.0-19.0	9.0-13.0
TP347H	S34709	0.04-0.10	2	0.045	0.03	1	17.0-19.0	9.0-13.0
TP347LN	S34751	0.05-0.02	2	0.045	0.03	1	17.0-19.0	9.0-13.0
TP347LN	S34751	0.05-0.02	2	0.045	0.03	1	17.0-19.0	9.0-13.0
TP348	S3480	0.08	2	0.045	0.03	1	17.0-19.0	9.0-13.0
TP348H	S34809	0.04-0.10	2	0.045	0.03	1	17.0-19.0	9.0-13.0

A312 SS PIPES MECHANICAL PROPERTIES

SS Pipes Grade	Tensile Strength	Yield Strength	Elongation
ASTM A312/ASME SA312	N/mm2 (min)	N/mm2 (min)	% (min)
TP304	515	205	35
TP304L	485	170	35
TP316	515	205	35
TP316L	485	170	35
TP321	OD < 17,1 mm – 515;	OD < 17,1 mm – 205;	35
TP321	OD > 17,1 mm – 485	OD > 17,1 mm – 170	35

ASTM A312 PIPE DIMENSIONS

The standard stainless steel pipes dimensions are set by the ANSI ASME B36.19 specification.ASTM A312 AISI 316 sch40 Stainless steel welded pipe

Seamless SS pipes are available in the size range 1/8″ thru 24″, welded stainless pipes ASTM A312 are manufactured in the range 2″ thru 36″ (ASTM A312, ASTM A358, i.e. electric-fusion-welded austenitic chromium-nickel stainless steel pipe, or as rolled).

AISI 201 202 304L 316 ASTM A312 China manufacture

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