ASTM A193 — Alloy-steel and stainless steel bolting for high temperature or high pressure service
ASTM A193 covers alloy and stainless steel bolting — stud bolts, bolts, screws — for pressure vessels, valves, flanges and fittings in high-temperature or high-pressure service. Grades include B7, B7M, B16, B8 and B8M (Classes 1 and 2) and others.
ASTM A193 grades — chemistry and mechanical properties
| Grade | UNS | C% | Cr% | Ni% | Mo% | YieldMPa min | TensileMPa min |
|---|---|---|---|---|---|---|---|
| ASTM A193 B7 | G41400 | 0.37–0.49 | 0.75–1.20 | — | 0.15–0.25 | 720 | 860 |
| ASTM A193 B7M | G41400 | 0.37–0.49 | 0.75–1.20 | — | 0.15–0.25 | 550 | 690 |
| ASTM A193 B16 | K14072 | 0.36–0.47 | 0.80–1.15 | — | 0.50–0.65 | 725 | 860 |
| ASTM A193 B8 Cl.1 | S30400 | 0.08 max | 18.0–20.0 | 8.0–11.0 | — | 205 | 515 |
| ASTM A193 B8M Cl.1 | S31600 | 0.08 max | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | 205 | 515 |
Reference information compiled from the published standard for convenience. It does not replace the current edition of the governing standard, which takes precedence. Verify critical dimensions and properties before design, purchase or fabrication. Teshi Engineers & Sales Promoters (P) Ltd accepts no liability for errors or omissions.
FAQ
ASTM A193: common questions
Which grades does ASTM A193 cover?
On this site: ASTM A193 B7, ASTM A193 B7M, ASTM A193 B16, ASTM A193 B8 Cl.1, ASTM A193 B8M Cl.1. Open any grade for its full chemical composition, mechanical properties and PDF data sheet.
Does Teshi Group supply material to ASTM A193?
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.
Ready to build to spec?
Share your drawing, bill of materials or technical requirements with the Teshi team.