EN 1.4923, also known as X22CrMoV12-1 (W.Nr. 1.4923), is a chromium-molybdenum-vanadium alloyed steel developed for high-temperature and high-pressure service. Compared to lower alloyed boiler steels, it offers improved creep strength and oxidation resistance, making it suitable for demanding power generation and selected petrochemical applications.
This grade is commonly specified for pressure parts and high-temperature components where long-term stability under load is critical. Exact delivery condition and test results are confirmed on the EN 10204 / 3.1 certificate.
| Element | Typical range (wt. %) |
|---|---|
| C | 0.08 – 0.15 |
| Si | ≤ 0.50 |
| Mn | 0.30 – 0.80 |
| P | ≤ 0.025 |
| S | ≤ 0.015 |
| Cr | 2.0 – 2.5 |
| Mo | 0.9 – 1.1 |
| V | 0.20 – 0.35 |
| Fe | Balance |
| Property | Typical value (condition-dependent) |
|---|---|
| Tensile strength (Rm) | per standard / see EN 10204 3.1 certificate |
| Yield strength (Rp0.2) | per standard / see EN 10204 3.1 certificate |
| Elongation (A5) | per standard / see EN 10204 3.1 certificate |
| Hardness | per standard / see EN 10204 3.1 certificate |
| Creep resistance | designed for higher-temperature service than 1.4913 |
Exact values are stated on the material certificate EN 10204 / 3.1.
High temperature steel 1.4923 is supplied in multiple product forms to support both machining and forged components. Depending on specification and availability, the following forms can be delivered:
Round bar (hot rolled / forged, peeled / turned to DIN EN 10060; lengths 4–6 m):
Stock range: Ø 20.00 mm – Ø 625.00 mm
Round bar (bright drawn / ground, tol. h9 to DIN EN 10278; lengths 3 m):
Stock range: Ø 5.00 mm – Ø 20.00 mm
Hexagon bar (bright drawn, tol. h11 to DIN EN 10278; lengths 3 m):
Stock range: 13.00 mm – 60.00 mm
Centerless grinding available on request. For quotation, please provide the required tolerance class, straightness and surface finish.
1.4923 typically contains higher chromium and is designed for improved oxidation resistance and creep performance at elevated temperatures. This allows higher design temperatures compared to 1.4913 in certain standards and applications. Final selection depends on design code, component thickness and operating conditions.
It is commonly used for maintenance and replacement of existing installations. In new high-efficiency designs, alternative grades (such as P91/P92 families) are often selected depending on design targets and availability. Material choice should always follow the applicable standard and project specification.
Yes, but welding requires controlled procedures, typically including preheating and post-weld heat treatment to achieve the required toughness and creep properties. Welding procedures must comply with the applicable code, WPS and client requirements.
Yes. We can supply hot rolled/forged round bar (peeled/turned), bright drawn/ground bar, and bright drawn hexagon bar from stock ranges listed above. Forgings (bars, discs, rings) and blocks/flats sawn from forged material are available on request, typically according to drawings.
Certificates: EN 10204 / 3.1
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