ASTM A193 B7M — Chemical Composition & Mechanical Properties
ASTM A193 B7M is an ASTM specification for stud bolts / bolting (UNS G41400). This sheet summarises its chemical composition limits and minimum mechanical properties. Typical use: sour-service (NACE) flange bolting (values for dia ≤ M100 / 4 in.).
Chemical composition of ASTM A193 B7M (weight %)
Mechanical properties
| Tensile strength, min | 690 MPa |
|---|---|
| Yield strength, min | 550 MPa |
| Elongation, min | 18 % |
| Hardness | 235 HBW (99 HRB) |
Heat treatment
Quenched & tempered, 620 °C min temper; 100 % hardness tested
Typical service
Sour-service (NACE) flange bolting (values for dia ≤ M100 / 4 in.)
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 B7M: common questions
What is the minimum yield strength of ASTM A193 B7M?
550 MPa, with a minimum tensile strength of 690 MPa.
What is the carbon content of ASTM A193 B7M?
0.37–0.49 %.
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