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CHEMICAL COMPOSITION

ASTM SPECIFICATION AND GRADE

KS SPECIFICATION AND GRADE

JIS GRADE

B.S. SPECIFICATION AND GRADE

DIN SPECIFICATION AND GRADE

MARKING SIMBOL

PIPE

PLATE

FORGING

PIPE

PLATE

PIPE

PLATE

PIPE

PIPE

C.S

-

A120

A283-A

-

SPP

SS400

SGP 

SS400

1387-M 

2440-ST33-1 

C.S

-

A53-B

A242

SPPS38

SWS41B 

STPG38 

SM400B 

3602-ERW23 

1626-ST37 

C.S

-

A53-B

A242

SPPS42

SWS41B 

STPG42 

SM400B 

3602-ERW27 

C.S

WPA

A106-A

A285-B

A181-1 

SPHT38

SBB42 

STPT38 

SB410

3602-Steel23 

17175-St 35.8 

C.S

WPB

A106-B

A515-65 or 70

A181-2 and A106 

SPHT42

SBB42 

STPT42 

SB410

3602-Steel27 

17175-St 45.8 

C.S

WPC

A106-C

-

SPHT49

SBB49 

STPT49 

SB450

3602-Steel35 

C.S

WPL6

A333 and A334-6

A516-60

A350 LF2 

SPLT39

SLAL33

STPL39 

3603-Steel27-LT30 

3 1/2% Ni Steel

WPL3

A333 and A334-3

A203-D

A350 LF3 

-

STPL46 

3603-Steel 503 LT100 

Carbon-Molybdenum Steel

WP1

A335-P1

A204-B

A182 F1

SPA12

SBB46M 

STPA12 

17175-15 Mo3 

1% Cr-1/2% Molybdenum Steel

WP12

A335-P12

A387-12

A182 F12 

SPA22

SCMV2 

STPA22 

3604-HF620 

17175-13CrMo44 

1 1/4% Cr-1/2% Molybdenum Steel

WP11

A335-P11

A387-11

A182 F11 

SPA23

SCMV3 

STPA23 

3604-HF621 

2 1/4% Cr-1% Molybdenum Steel

WP22

A335-P22

A387-22

A182 F22 

SPA24

SCMV4 

STPA24 

3604-HF622, 27 

17175-10CrMo910 

5% Cr-1/2% Molybdenum Steel

WP5

A335-P5

A387-5

A182 F5 

SPA25

SCMV6 

STPA25 

3604-HF625 

7% Cr-1/2% Molybdenum Steel 

WP7

A335-P7

-

A182 F7 

-

9% Cr-1% Molybdenum Steel 

WP9

A335-P9

-

A182 F9 

-

STPA26 

18%Cr -8% Ni Steel

WP304

A312-TP304

A240 Type 304

A183 F304 

STS304TP

STS304 

SUS304TP 

SUS304 

3605-801 

17440-X5CrNi189 

18%Cr -8% Ni(0.04-0.10)% C Steel

WP304H

A312-TP304H

A240Type 304

A182 F304H 

-

SUS304HTP 

3605-811 

18%Cr -8% Ni - 0.035% C Steel

WP304L

A312-TP304L

A240 Type 304L

A182 F304L 

STS304LTP

STS304L

SUS304LTP 

SUS304L 

3605-811L 

17440-X2CrNi189 

22%Cr - 12% Ni Steel

WP309

A312-TP309

A240 Type 309S

STS309STP

STS309S 

SUS309STP 

SUS309S 

25%Cr - 20% Ni Steel

WP310

A312-TP310

A240 Type 310S

A182 F310 

STS310STP

STS310S 

SUS310STP 

SUS310S 

3605-805S 

25%Cr - 8% Ni-Cb+Ta Steel

WP347

A312-TP347

A240 Type 347

A182 F347 

STS347TP

STS347

SUS347TP 

SUS347 

3605-822 Nb 

17440-X10CrNiNb189 

18%Cr -8% Ni-Mo Steel

WP316

A312-TP316

A240 Type 316

A182 F316 

STS316TP

STS316 

SUS316TP 

SUS316 

3605-845 

17440-X5CrNiMo1810 

18%Cr -8% Ni-Mo-(0.04-0.10)% C Steel

WP316H

A312-TP316H

A240 Type 316

A182 F316H 

STS316HTP

-

SUS316HTP 

3605-855 

18%Cr -8% Ni-Mo-0.035% C Steel

WP316L

A312-TP316L

A240 Type 316L

A182 F316L 

STS316LTP

STS316L

SUS316LTP 

SUS316L 

3605-845L 

17440-X2CrNiMo1810 

18%Cr -8% Ni-Ti Steel

WP321

A312-TP321

A240 Type 321

A182 F321 

STS321TP

STS321 

SUS321TP 

SUS321 

3605-822Ti 

17440-X10CrNiMo189 

18%Cr -8% Ni-Ti-(0.04-0.10)% C Steel

WP321H

A312-TP321H

A240 Type 321

A182 F321H 

-

SUS321HTP 

3605-832Ti 

18%Cr -8% Ni-Cb+Ta-(0.04-0.10)% C Steel 

WP347H

A312-TP347H

A240 Type 347

A182 F347H 

STS347HTP

SUS347HTP 

3605-832Nb