ASTM A194 8M — Chemical Composition & Mechanical Properties
ASTM A194 8M is an ASTM specification for heavy hex nuts (UNS S31600). This sheet summarises its chemical composition limits and minimum mechanical properties. Typical use: nuts for A193 B8M studs.
Chemical composition of ASTM A194 8M (weight %)
C0.08 max
Mn2.00 max
P max0.045
S max0.030
Si1.00 max
Cr16.0–18.0
Ni10.0–14.0
Mo2.00–3.00
Mechanical properties
| Proof load stress | 550 MPa (80 ksi), heavy hex |
|---|---|
| Hardness | 126–300 HBW |
Heat treatment
Carbide solution treated
Typical service
Nuts for A193 B8M studs
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 8M: common questions
What is the carbon content of ASTM A194 8M?
0.08 max %.
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