Huaqiang

ASME SA312/SA312M

ASME SA312/SA312M covers seamless and straight-seam welded austenitic pipe intended for high temperature and general corrosive service. Steel pipe of ASME SA312/SA312Mshould be marked with the following info: Pipe size, wall thickness, specification, grade, seamless or welded, heat number, etc. Welded pipe of ASME SA312/SA312M should not use filler metal in automatic welding, large diameter pipe may have 2 longitudinal welds, pipe can be hot finished or cold finished.

Grade:TP347H,TP347,TP321,TP317L and so on.

Standard: ASTM A312, A312M ASME SA312 / SA312M
Material/Steel Grade: TP304, TP304L, TP304H, TP310, TP310S, TP316, TP316L, TP316Ti, TP317, TP317L, TP321, TP321H, TP347, TP347H
Application: Seamless Austenitic Stainless Steel Pipes
Size: OD: 1/4″~20″ WT: SCH5S~SCH80S
Finish: Mill

WT Tolerance %

NPS

ASME SA312  WT Tolerance, %

+

–

1/8-2 1 /2

20.0

12.5

3~18, t/D≤ 5%

22.5

12.5

3~18, t/D> 5%

15.0

12.5

≥ 20, welded

17.5

12.5

≥ 20, seamless, t/D≤ 5%

22.5

12.5

≥ 20, seamless, t/D> 5%

15.0

12.5

Chemical Composition (%, max)

Steel Grade

C

Si

Mn

Cr

Ni

Mo

S

P

TP304

0,08

0,75

2

18 – 20

8 – 11

–

0,03

0,04

TP304L

0,035

0,75

2

18 – 20

8 – 13

–

0,03

0,04

TP316

0,08

0,75

2

16 – 18

11 – 14

2 – 3

0,03

0,04

TP316L

0,035

0,75

2

16 – 18

10 – 15

2 – 3

0,03

0,04

TP321

0,08

0,75

2

17 – 20

9 – 13

–

0,03

0,04

Mechanical Properties

Steel Grade

Tensile Strength, 

N/mm2 (min)

Yield Strength, 

N/mm2 (min)

Elongation, % (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 – 485

OD < 17,1 mm – 205;
OD > 17,1 mm – 170

35

Equivalent steel grade

ASME SA312/SA312M

JIS G3459

DIN 17440

BS

NF

TP304

SUS 304 TP

X5CrNi 18 9

304S18

A 49-230

TP304H

SUS 304 HTP

 

304S59

A 49-214

TP310

304 LTP

X2 CrNi 19 9

304S14

A 49-230

TP316

SUS 304L TP

 

 

 

TP316H

310STP

X5 CrNiMo 18 10

316S18

A 35-573

TP316L

SUS 316 TP

 

316S59

A 49-230

TP321

SUS 316 LTP

X2 CrNiMo 18 10

316S14

A 49-230

TP347

316 HTP

x10 CrNiTi 18 9

321S18

A 49-230

TP347H

SUS 316 LTP

X5 CrNiNb 18 9

347S18

A 35-573
%E7%AC%AC%E4%B8%80%EF%BC%8C%E6%9C%80%EF%BC%8C%E4%BC%98%E7%A7%80%EF%BC%8C%E5%A2%9E%E5%BC%BA%EF%BC%8C%E4%B8%80%E6%B5%81%EF%BC%8C%E5%8D%93%E8%B6%8A%EF%BC%8C%E9%A2%86%E5%85%88%EF%BC%8C%E5%85%88%E8%BF%9B%EF%BC%8C%E5%BC%95%E9%A2%86

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