ASTM A312

ASTM A312 Standard

ASTM A312 United States materials ASTM seamless steel tube of austenitic stainless steel welded steel tubes referred to set standards, ASTM A312 coefficient of austenitic stainless steel welded pipe are as follows:

Standard	ASTM A312/A312M
Grade	TP304 TP304L TP316 TP316L TP317 TP317L TP347 TP310H* 　 TP321H△
Yield strength σ 0.2 (Mpa)	≥170;≥205
Tensile strength σ 0.2 (Mpa)	≥485;≥515
Elongation σ 5 (%)	≥35
Flattening test (mm)	H=1.09t/(0.09+t/D)and test the integrity of
Expansion test
Grain size	"*"、"△" ASTM E112 6#or6#up
Hydrostatic testing (Mpa)	D Pmax ASTM A530 D≤270mm P=2Rt/D R=50% σ0.2 ≤88.9 17 ＞88.9 19
Crystal decay test	ASTM A262 E (Additional requirements)
Non-destructive testing	ASTM E13 E309 E426
Heat treatment	Requirements
Outside diameter deviation (mm)	Outer diameter Permissible deviations 10.3-48.3 +0.40/-0.80 ＞48.3-114.3 +0.80/-0.08 ＞114.3-219.1 +1.60/-0.80 ＞219.1-457.2 +2.40-0.80 ＞457.2-660.4 +3.20/-0.80 ＞660.4-864 +4.00/-0.08 ＞864-1219.2 +4.80/-0.08
Wall thickness deviation (mm)	+no require/-12.5%t
Curvature (mm/m)	Reasonable straight
Other requirements	HRB＜90

ASTM A312 austenitic stainless steel chemical composition is as follows:

Grade

UNS number

Chemical composition (%)

C

Mn≤

P≤

S≤

Si

Ni

Cr

Mo

Ti

Niobium and tantalum

Tantalum≤

NC

Cerium

Other

TP304

S30400

0.08max

2.00

0.040

0.030

0.75max

8.00-11.00

18.0-20.0

/

/

/

/

/

/

/

TP304L

S30403

0.035max

2.00

0.040

0.030

0.75max

8.00-13.00

18.0-20.0

/

/

/

/

/

/

/

TP316

S31600

0.08max

2.00

0.040

0.030

0.75max

11.00-14.00

16.00-18.00

2.0-3.0

/

/

/

/

/

/

TP316L

S31603

0.035maxB

2.00

0.040

0.030

0.75max

10.00-15.00

16.00-18.00

2.0-3.0

/

/

/

/

/

/

TP321

S32100

0.08max

2.00

0.040

0.030

0.75max

9.00-13.00

17.00-20.00

/

D

/

/

/

/

/

Project	GB,YB	JIS	VDEh(W-Nr.)				BS	NF	Т	ISO
				ASTM	AISI	SAE
Cold-working die steel group	MnCrWV			O1	O1		BO1
	CrWMn	SKS31	105WCr6(1.2419)					2212 90MCW5	XBГ
	9CrWMo	SKS3							9XBГ
		SKD2	X210CrW12(1.2436)	D7	D7
(4) Group of hot work die steel	5CrMnMo	SKT3	40CrMnMo7(1.2311)	6G(ASM)	6G				5XГM
		SKT5	48CrMoV67(1.2323)	6G(ASM)	6G
		SKT2		6150	6150	6150
	SCrNiMo	SKT4	55NiCrMoV6(1.2713)	6F2(ASM)	6F2			3381 55NCDV7	5XГM
	3Cr2W8V	SKD5	X30WCrV53(1.2567)	H21	H21		BH21, BH21A	3543 Z30WCV9	3X2B8ψ
	4SiCrV		38SiCrV8(1.2248) 45SiCrV6(1.2249)						4XC
	8Cr3								8X3
	4Cr5MoVSi	SKD6	X38CrMoV51(1.2343)	H11	H11		BH11	3431 Z38CDV5
		SKD4							4X2B5ψM
		SKD61	X40CrMoV51(1.2344)	H13	H13		BH13
		SKD62		H12	H12		BH12	3432 Z38CDWV5

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