ASTM A182 F5 — Chemical Composition & Mechanical Properties
ASTM A182 F5 is a chrome-moly alloy steel grade for forged flanges & fittings (UNS K41545, EN / W.Nr 1.7362). It is also known as 5Cr-½Mo. 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 A182 F5 at a glance
| Specification | ASTM A182 F5 |
|---|---|
| Material family | Chrome-moly alloy steel |
| Product form | Forged flanges & fittings |
| UNS number | K41545 |
| EN / W.Nr equivalent | 1.7362 |
| Also known as | 5Cr-½Mo |
| Document | TG-MG-113 · Rev. 1 · October 2026 |
Typical service
Refinery heater and hydrogen service
Heat treatment
Annealed, or normalised and tempered 675 °C min
Chemical composition of ASTM A182 F5 (weight %)
Single values are maximums unless shown as a range or “min”.
Mechanical properties
| Tensile strength, min | 485 MPa |
|---|---|
| Yield strength (0.2 % offset), min | 275 MPa |
| Elongation, min | 20 % |
| Hardness | 143–217 HBW |
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 A182 F5
All equivalents| Standard system | Nearest equivalent grade |
|---|---|
| USA — ASTM / ASME | ASTM A182 F5 · ASME SA-182 F5 |
| USA — UNS | K41545 |
| Europe — EN designation | X11CrMo5 (EN 10216-2) |
| Europe — W.Nr | 1.7362 |
| Japan — JIS | STPA25 / SFVAF5B |
| China — GB / NB | 12Cr5MoI (GB/T 9948) / 1Cr5Mo |
| China — old GB designation | 1Cr5Mo |
| UK — BS (withdrawn) | BS 3604 625 |
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 |
|---|---|
| Wrought butt-weld fittings | ASTM A234 WP5 Cl.1 |
| Seamless pipe | ASTM A335 P5 |
Standards for ASTM A182 F5
All material standardsFAQ
ASTM A182 F5: common questions
What is the minimum yield strength of ASTM A182 F5?
275 MPa, with a minimum tensile strength of 485 MPa.
What is the carbon content of ASTM A182 F5?
0.15 max %.
What is the UNS number and EN equivalent of ASTM A182 F5?
UNS K41545; the nearest European designation is W.Nr 1.7362. Equivalents are close but not identical — check the specification if substituting.
How is ASTM A182 F5 heat treated?
Annealed, or normalised and tempered 675 °C min.
What is the Chinese (GB) equivalent of ASTM A182 F5?
The nearest Chinese equivalent is 12Cr5MoI (GB/T 9948) / 1Cr5Mo, formerly 1Cr5Mo. Equivalents are close but not identical — compare chemistry and properties before substituting.
What is the JIS equivalent of ASTM A182 F5?
The nearest Japanese (JIS) equivalent is STPA25 / SFVAF5B.
Does Teshi Group supply ASTM A182 F5?
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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