ASTM A194 — Carbon steel, alloy steel and stainless steel nuts for bolts for high pressure or high temperature service
ASTM A194 covers heavy hex nuts in carbon, alloy and stainless steel for high-pressure or high-temperature bolting: Grades 2H, 2HM, 4, 7, 7M, 8, 8M and others, with proof-load and hardness requirements.
ASTM A194 grades — chemistry and mechanical properties
| Grade | UNS | C% | Cr% | Ni% | Mo% | YieldMPa min | TensileMPa min |
|---|---|---|---|---|---|---|---|
| ASTM A194 2H | — | 0.40 min | — | — | — | — | proof 1205 |
| ASTM A194 2HM | — | 0.40 min | — | — | — | — | proof 1035 |
| ASTM A194 8 | S30400 | 0.08 max | 18.0–20.0 | 8.0–11.0 | — | — | proof 550 |
| ASTM A194 8M | S31600 | 0.08 max | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | — | proof 550 |
| ASTM A194 Grade 7 | G41400 | 0.37–0.49 | 0.75–1.20 | — | 0.15–0.25 | — | proof 1205 |
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 A194: common questions
Which grades does ASTM A194 cover?
On this site: ASTM A194 2H, ASTM A194 2HM, ASTM A194 8, ASTM A194 8M, ASTM A194 Grade 7. Open any grade for its full chemical composition, mechanical properties and PDF data sheet.
Does Teshi Group supply material to ASTM A194?
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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