TYPE : SEAMLESS
GRADE : ASTM A335 P1 / P2 / P5 / P9 / P11 / P12 / P22 / P91
ASTM A333 Gr.1 / Gr.3 / Gr.6 / Gr.8
JIS STPL46, STBL39, STS38, STPL46, STBL46, STPL79, STBL70
BS 3603/503, 3603/509
DIN 1.5637 - 10Ni14, 1.5662 - X8Ni9
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A. SPP, SGP (low working pressure) conveying steam, water, oil gas, air
B. STPG 370 (high pressure sevice) approximate maximum temperature of 350c
C. A106 Gr.B mainly used for piping at a temperature over 350c
D. STB 400 water tube, sokke tubes uperheater tube, air preheater tube, boiler, heat exchanger
tube condenser tube, catalyser tube
E. STKM 13a, STKR 400 automobiles, bicycles, furniture, appliances and other machine parts.
Specification and Grade
| ASTM | JIS | BS | DIN | |
| NO | Code | |||
| A53 Gr.A/ A106 Gr.A A161, A179, A192 | STS35, STS38 STPT38, STB30, STB33, STB35 | 3601/320 3602/360 3059 | 1.0308 1.0309 1.0305 | St35 St35.4 St35.8 |
| A53 Gr.B/ A106 Gr.B A210 Gr.A1 | STPG42, STS42 STPT42, STB42 | 3601/410 3602/ | 1.0408 1.0418 1.0405 1.0611 | St45 St45.4 St45.8 C22 |
| A106 Gr.C, A210 Gr.C | STS49, STPT49 | |||
| A335 P1 | STPA12, STBA12 | |||
| A335 P2 | STPA20, STBA20 | |||
| A335 P5 | STPA25, STBA25 | 625 | 1.7362 | 12CrMo195 |
| A335 P7 | ||||
| A335 P9 | STPA26, STBA26 | 629 | 1.7386 | 12CrMo91 |
| A335 P11 | STPA23, STBA23 | 621 | ||
| A335 P12 | STPA22, STBA22 | 3604/620~460 | ||
| A335 P22 | STPA24, STBA24 | 622 | 1.738 | 10CrMo910 |
| A335 P91 | ||||
