Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
1.4933 is a 12% chromium martensitic creep-resistant heat-resistant steel alloyed with nickel and molybdenum. This datasheet presents the material within the Werkstoff-Nummer (DIN / EN) designation system.
With about 12% chromium plus nickel and molybdenum, 1.4933 is a high-strength martensitic chromium steel developed for elevated-temperature service, related to the Jethete-type 12Cr-Ni-Mo turbine-blade steels. The nickel addition improves toughness and hardenability and the molybdenum gives temper resistance and creep strength. It is hardened by quenching and tempering and offers a strong combination of strength, toughness and fatigue resistance at elevated temperature.
Typical applications include steam- and gas-turbine blades and rotor components, aero-engine parts, high-temperature bolting, and highly stressed fasteners.
| Property | Value | Unit |
|---|---|---|
| Density | 7.7 | g/cm³ |
| Melting range | 1430–1510 | °C |
| Elastic modulus | 216 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 10.8 | µm/m·°C |
| Thermal conductivity (20 °C) | 24.0 | W/m·K |
| Specific heat (20 °C) | 460 | J/kg·K |
| Structure | Martensitic | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Iron | Fe | Balance | — | Base element |
| Chromium | Cr | 11.0 | 12.5 | Corrosion / oxidation resistance |
| Nickel | Ni | 2.00 | 3.00 | Toughness; hardenability |
| Molybdenum | Mo | 1.50 | 2.00 | Temper resistance; creep strength |
| Carbon | C | 0.08 | 0.15 | Hardness; strength |
| Manganese | Mn | 0.30 | 0.90 | Deoxidiser |
| Silicon | Si | — | 0.50 | Deoxidiser |
| Nitrogen | N | — | 0.050 | Strengthening |
| Phosphorus | P | — | 0.025 | Residual impurity |
| Sulphur | S | — | 0.015 | Residual impurity |
Hardened-and-tempered (+QT) condition, per EN 10269 for W.Nr. 1.4933.
| Condition | Property | Value |
|---|---|---|
| Quenched & tempered | Tensile strength (Rm) | 900–1050 MPa |
| Quenched & tempered | 0.2% proof strength (Rp0.2) | ≥760 MPa |
| Quenched & tempered | Elongation (A5) | ≥15 % |
| Quenched & tempered | Reduction of area (Z) | ≥45 % |
| Quenched & tempered | Impact energy (KV) | ≥41 J |
Values per EN 10269; creep-rupture data are given in EN 10302. Confirm against the inspection certificate (EN 10204).
| Environment | Performance | Notes |
|---|---|---|
| High-temperature oxidation | Good | Suited to elevated-temperature service |
| Steam | Good | Common in steam-turbine service |
| Atmospheric / general | Moderate | Better than low-alloy steels; below austenitic |
| Mild acids | Limited | Martensitic 12Cr level |
| Chloride pitting | Limited | Not for aggressive chloride service |
Corrosion and oxidation resistance is typical of 12% chromium martensitic steels — adequate for steam and elevated-temperature service but below the austenitic stainless grades.
A martensitic grade; hardened by quenching and tempering.
Solution Treatment (Austenitise + Quench) Austenitise at approximately 980–1050 °C and oil or air quench to form martensite.
Temper Temper at approximately 550–700 °C depending on the strength and toughness required; a double temper is often used. An anneal is used for the soft, machinable condition.
Weldable with care; the martensitic structure requires preheat (~250–350 °C), interpass control and post-weld heat treatment to avoid hard, crack-sensitive welds.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Acceptable (with PWHT) | Matching X11CrNiMo12 consumable |
| GMAW / MIG | Acceptable (with PWHT) | Matching consumable |
| EBW / laser | Good | Autogenous or matching filler |
Preheat, interpass control and post-weld heat treatment are required to develop properties and avoid cracking.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Preferred condition | Annealed for machining, then harden and temper |
| Machinability | Moderate; carbide tooling for hardened material |
| Coolant | Ample flood coolant |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Limited — high strength |
| Hot forming | ~1150–900 °C; harden and temper afterward |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Power generation | Steam- and gas-turbine blades, rotors | Creep + temper resistance |
| Aerospace | Aero-engine parts, shafts | Strength + toughness + fatigue resistance |
| Fasteners | High-temperature bolting, highly stressed fasteners | Strength + toughness |
| Process / engine | Highly stressed elevated-temperature parts | Strength at temperature |
| Product Form | DIN / EN Standard | Notes |
|---|---|---|
| Bar and fasteners (elevated temp.) | EN 10269 · W.Nr. 1.4933 | X11CrNiMo12 |
| Creep-resisting steels (data) | EN 10302 · W.Nr. 1.4933 | — |
| Bar / forgings | W.Nr. 1.4933 | — |
| Technical delivery | VdTÜV | — |
High-strength 12Cr-Ni-Mo martensitic heat-resistant steel. W.Nr. 1.4933 (X11CrNiMo12).
| W.Nr. | Cr % | Ni % | Mo % | Other | Best Used For |
|---|---|---|---|---|---|
| 1.4933 | 11–12.5 | 2–3 | 1.5–2 | — | 12Cr-Ni-Mo high-strength martensitic; turbine blades and discs |
| 1.4938 | 11–12.5 | 2–3 | 1.5–2 | V | 12Cr-Ni-Mo-V variant (with vanadium) |
| 1.4939 | 11–12.5 | 2–3 | 1.5–2 | — | 12Cr-Ni-Mo turbine-blade variant |
| 1.4935 | 11–12.5 | 0.3–0.8 | 0.8–1.2 | W, V | 12Cr-Mo-W-V creep martensitic (422) |
| 1.4923 | 11–12.5 | 0.3–0.8 | 0.8–1.2 | V | 12Cr-Mo-V turbine-blade martensitic |
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