ASTM A234 WP92 — Chemical Composition & Mechanical Properties
ASTM A234 WP92 is a chrome-moly alloy steel grade for wrought butt-weld fittings (UNS K92460, EN / W.Nr 1.4901). It is also known as 9Cr-2W. This sheet summarises its chemical composition limits, minimum mechanical properties, heat treatment and typical service. Teshi Group manufactures flanges and fittings in this grade.
ASTM A234 WP92 at a glance
| Specification | ASTM A234 WP92 |
|---|---|
| Material family | Chrome-moly alloy steel |
| Product form | Wrought butt-weld fittings |
| UNS number | K92460 |
| EN / W.Nr equivalent | 1.4901 |
| Also known as | 9Cr-2W |
| Document | TG-MG-148 · Rev. 1 · October 2026 |
Typical service
Butt-weld fittings for P92 main steam lines
Heat treatment
Normalised 1040–1080 °C and tempered 730–800 °C
Chemical composition of ASTM A234 WP92 (weight %)
Other elements and limits: W 1.50–2.00; V 0.15–0.25; Nb 0.04–0.09; B 0.001–0.006; Al 0.02 max; Ti 0.01 max; Zr 0.01 max
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 620 MPa |
|---|---|
| Yield strength (0.2 % offset), min | 440 MPa |
| Elongation, min | 20 % |
| Tensile strength, max | 840 MPa |
| Hardness | 269 HBW max |
About chrome-moly alloy steel
Chrome-moly steels are low-alloy steels with 1–9 % chromium and 0.5–1 % molybdenum. Chromium gives oxidation and sulphidation resistance; molybdenum gives creep strength at high temperature. They are the standard choice for steam and hot hydrocarbon service above the carbon-steel range.
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 A234 WP92
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — ASTM / ASME | ASTM A234 WP92 · ASME SA-234 WP92 |
| USA — UNS | K92460 |
| Europe — EN designation | X10CrWMoVNb9-2 |
| Europe — W.Nr | 1.4901 |
| Japan — JIS | STPA29 (JIS G3458) |
| China — GB / NB | 10Cr9MoW2VNbBN (GB/T 5310) |
Equivalents are the nearest commonly cited grades. Chemistry, mechanical properties and testing differ between standards — compare them before substituting one for another.
Same alloy in other product forms
| Product form | Specification / grade |
|---|---|
| Forged flanges & fittings | ASTM A182 F92 |
| Seamless pipe | ASTM A335 P92 |
Standards for ASTM A234 WP92
All material standardsFAQ
ASTM A234 WP92: common questions
What is the minimum yield strength of ASTM A234 WP92?
440 MPa, with a minimum tensile strength of 620 MPa.
What is the carbon content of ASTM A234 WP92?
0.07–0.13 %.
What is the UNS number and EN equivalent of ASTM A234 WP92?
UNS K92460; the nearest European designation is W.Nr 1.4901. Equivalents are close but not identical — check the specification if substituting.
How is ASTM A234 WP92 heat treated?
Normalised 1040–1080 °C and tempered 730–800 °C.
What is the Chinese (GB) equivalent of ASTM A234 WP92?
The nearest Chinese equivalent is 10Cr9MoW2VNbBN (GB/T 5310). Equivalents are close but not identical — compare chemistry and properties before substituting.
What is the JIS equivalent of ASTM A234 WP92?
The nearest Japanese (JIS) equivalent is STPA29 (JIS G3458).
Does Teshi Group supply ASTM A234 WP92?
Teshi Group manufactures flanges and fittings 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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