GB/T 9948 — Seamless steel tubes for petroleum cracking
GB/T 9948 covers seamless carbon and Cr-Mo steel tubes for refinery furnaces, heat exchangers and process piping, including 12Cr5MoI and 12Cr9MoI — comparable to ASTM A335 P5 and P9.
GB/T 9948 at a glance
| Standard | GB/T 9948 |
|---|---|
| Issued by | China (SAC) |
| Product form | Pipe |
| Grades on this site | 2 |
GB/T 9948 grades and their ASTM equivalents
| GB/T designation | Nearest ASTM / ASME grades | UNS | W.Nr |
|---|---|---|---|
| 12Cr5MoI (GB/T 9948) / 1Cr5Mo | ASTM A182 F5, ASTM A234 WP5 Cl.1, ASTM A335 P5, ASTM A182 F5a | K41545 | 1.7362 |
| 12Cr9MoI (GB/T 9948) / 1Cr9Mo1 | ASTM A182 F9, ASTM A234 WP9 Cl.1, ASTM A335 P9 | K90941 | 1.7386 |
Equivalents are the nearest commonly cited grades. Chemistry, mechanical properties and testing differ between standards — compare them before substituting one for another.
FAQ
GB/T 9948: common questions
What is the ASTM equivalent of GB/T 9948 12Cr5MoI?
The nearest ASTM grades are ASTM A182 F5, ASTM A234 WP5 Cl.1, ASTM A335 P5, ASTM A182 F5a.
Does Teshi Group supply material to GB/T 9948?
Teshi Group manufactures flanges, fittings, fasteners and valves, and supplies pipes and plates, to ASTM / ASME specifications and to equivalent EN, JIS, GB and IS standards on request, with EN 10204 3.1 certificates. Send your requirement to info@teshigroup.com.
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