ASTM A193 B16 — Chemical Composition & Mechanical Properties
ASTM A193 B16 is a bolting & nut grades grade for stud bolts / bolting (UNS K14072, EN / W.Nr ≈ 1.7711 (40CrMoV4-6)). It is also known as Cr-Mo-V. This sheet summarises its chemical composition limits, minimum mechanical properties, heat treatment and typical service. Teshi Group manufactures stud bolts and nuts in this grade.
ASTM A193 B16 at a glance
| Specification | ASTM A193 B16 |
|---|---|
| Material family | Bolting & nut grades |
| Product form | Stud bolts / bolting |
| UNS number | K14072 |
| EN / W.Nr equivalent | ≈ 1.7711 (40CrMoV4-6) |
| Also known as | Cr-Mo-V |
| Document | TG-MG-032 · Rev. 1 · October 2026 |
Typical service
High-temperature bolting to about 595 °C (values for dia ≤ M64 / 2½ in.)
Heat treatment
Quenched & tempered, 650 °C min temper
Chemical composition of ASTM A193 B16 (weight %)
Other elements and limits: V 0.25–0.35; Al 0.015 max
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 860 MPa |
|---|---|
| Yield strength, min | 725 MPa |
| Elongation, min | 18 % |
| Hardness | 321 HBW (35 HRC) |
About bolting & nut grades
Flange bolting is specified as a stud-bolt grade plus a nut grade. ASTM A193 covers high-temperature bolting (B7, B7M, B16, B8, B8M), A320 covers low-temperature bolting (L7, L7M, L43, B8 classes), A453 covers high-strength austenitic bolting (Grade 660), and A194 covers the nuts (2H, 2HM, 4, 7, 8, 8M).
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.
International equivalents of ASTM A193 B16
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — ASTM / ASME | ASTM A193 B16 · ASME SA-193 B16 |
| USA — UNS | K14072 |
| Europe — EN designation | 40CrMoV4-6 |
| Europe — W.Nr | 1.7711 |
| Japan — JIS | SNB16 (JIS G4107) |
| China — GB / NB | 25Cr2MoV / 35CrMoV (GB/T 3077) |
| China — old GB designation | 25Cr2MoVA |
| UK — BS (withdrawn) | BS 1506-631 |
Equivalents are the nearest commonly cited grades. Chemistry, mechanical properties and testing differ between standards — compare them before substituting one for another.
Standards for ASTM A193 B16
All material standardsFAQ
ASTM A193 B16: common questions
What is the minimum yield strength of ASTM A193 B16?
725 MPa, with a minimum tensile strength of 860 MPa.
What is the carbon content of ASTM A193 B16?
0.36–0.47 %.
What is the UNS number and EN equivalent of ASTM A193 B16?
UNS K14072; the nearest European designation is W.Nr ≈ 1.7711 (40CrMoV4-6). Equivalents are close but not identical — check the specification if substituting.
How is ASTM A193 B16 heat treated?
Quenched & tempered, 650 °C min temper.
What is the Chinese (GB) equivalent of ASTM A193 B16?
The nearest Chinese equivalent is 25Cr2MoV / 35CrMoV (GB/T 3077), formerly 25Cr2MoVA. Equivalents are close but not identical — compare chemistry and properties before substituting.
What is the JIS equivalent of ASTM A193 B16?
The nearest Japanese (JIS) equivalent is SNB16 (JIS G4107).
Does Teshi Group supply ASTM A193 B16?
Teshi Group manufactures stud bolts and nuts in this grade. Send your size, rating and quantity to info@teshigroup.com for a quotation with EN 10204 3.1 certificates.
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