Project Description
Jethete M152 (XM-32, UNS S41041 / S64152, EN 1.4938, X12CrNiMoV12-3) is a nitrogen-bearing, 12% chromium hardenable martensitic stainless steel engineered for high-stress components operating at elevated temperatures up to 560 degC. The alloy achieves its exceptional creep-rupture strength and toughness through a balanced addition of nickel (2.0-3.0%), molybdenum (1.5-2.0%), vanadium (0.25-0.40%), and controlled nitrogen (0.020-0.040%) — elements that promote fine V(C,N) precipitation hardening and solid-solution strengthening during tempering. At SHUNFU METAL, Jethete M152 bar is produced under our ISO 9001 and API Q1 certified quality system using EAF + AOD + LF + VD melting followed by ESR or VAR refining, ensuring superior ingot solidification, micro-cleanliness, and structural homogeneity for the most demanding oil & gas, petrochemical, and power generation applications.
Equivalent Grades of Jethete M152 / 1.4938
| Standard | Designation |
|---|---|
| Trade Name | Jethete M152 |
| ASTM A565/A565M | XM-32 |
| UNS | S41041 / S64152 |
| AMS | 5718 / 5719 |
| EN 10269 / EN 10088-1 | 1.4938, X12CrNiMoV12-3 |
| DIN | 1.4938, X12CrNiMoV12-3 |
| GOST 5632 | 12X12H2M1FV |
| BS | S151 / S151D |
| AFNOR | Z12CNDV12 |
Oil & Gas and Power Generation Applications
Turbine Compressor Discs & Shafts
Rotating components in gas turbine compressor sections for oil & gas pipeline stations and refinery power units, where creep resistance at 500-560 degC is critical.
High-Temperature Flange Bolting
Fasteners and stud bolts for high-pressure flange connections in refinery piping systems, FCC units, and hydrocracker reactor closures per EN 10269.
Valve Stems & Seats
Stems and seat rings in high-temperature gate, globe, and control valves for refinery crude distillation, hydrotreating, and catalytic reforming service.
Refinery Pump Shafts
Shafts for hot oil circulation pumps, charge pumps, and boiler feed water pumps operating in high-temperature refining and petrochemical processes.
Compressor Impellers & Rings
Centrifugal compressor impellers, labyrinth rings, and sealing components in gas gathering, LNG liquefaction, and ethylene plant service.
Drilling Equipment Gears
Precision mechanical gears, drive shafts, and load-bearing components for top drives, mud pumps, and rotary table assemblies in drilling rigs.
Supply Range — Jethete M152 / 1.4938
Hot Rolled Round Bar
Diameter: 10 mm – 400 mm. Length: 3000 – 12000 mm. Delivered in hardened & tempered (+QT), annealed (+A), or solution-annealed condition. SHUNFU METAL maintains ready stock of 20 – 200 mm in +QT condition.
Hot Rolled Flat Bar
Thickness: 10 – 150 mm, Width: 50 – 800 mm. Length: 3000 – 9000 mm. Supplied annealed or +QT per customer specification.
Forged Round Bar
Diameter: 80 – 1200 mm. Length: 2000 – 10000 mm. Produced on SHUNFU METAL’s 6000-ton hydraulic forging press with radial forging capability for improved center consolidation and grain refinement. +QT or annealed.
Forged Flat Bar / Blocks
Thickness: 40 – 600 mm, Width: 100 – 1500 mm. Length: 1500 – 6000 mm. Forged hollow bar and step-forged shafts available upon request. Full ultrasonic testing per UT included.
Chemical Composition of 1.4938 / X12CrNiMoV12-3
| Element | EN 10269 (wt%) | AMS 5719 (wt%) | SHUNFU Internal (wt%) |
|---|---|---|---|
| Carbon (C) | 0.08 – 0.15 | 0.08 – 0.13 | 0.09 – 0.13 |
| Silicon (Si) | ≤ 0.50 | ≤ 0.35 | ≤ 0.30 |
| Manganese (Mn) | 0.40 – 0.90 | 0.50 – 0.90 | 0.50 – 0.80 |
| Phosphorus (P) | ≤ 0.025 | ≤ 0.030 | ≤ 0.020 |
| Sulfur (S) | ≤ 0.015 | ≤ 0.025 | ≤ 0.010 |
| Chromium (Cr) | 11.0 – 12.5 | 11.0 – 12.5 | 11.2 – 12.3 |
| Nickel (Ni) | 2.00 – 3.00 | 2.00 – 3.00 | 2.20 – 2.80 |
| Molybdenum (Mo) | 1.50 – 2.00 | 1.50 – 2.00 | 1.55 – 1.95 |
| Vanadium (V) | 0.25 – 0.40 | 0.25 – 0.40 | 0.28 – 0.38 |
| Nitrogen (N) | 0.020 – 0.040 | 0.020 – 0.040 | 0.025 – 0.038 |
| Iron (Fe) | Balance | Balance | Balance |
Composition per ladle analysis. SHUNFU METAL applies tighter internal controls on S, P, Si, and key alloying elements to ensure consistent +QT response and mechanical properties. Every heat is verified by OES and LECO for C, S, N, and O content before release.
Mechanical Properties — Jethete M152 / 1.4938
Heat treatment: Hardening at 1035 – 1065 degC followed by oil or air quenching, then tempering at 600 – 670 degC (minimum 2 hours). Double tempering is applied for critical components to ensure microstructural stability and complete stress relief. SHUNFU METAL verifies properties on every heat lot per EN 10269 and AMS 5719 requirements.
| Property | EN 10269 (+QT, d≤160mm) | AMS 5719 (Typical) |
|---|---|---|
| Tensile Strength, Rm (MPa) | 930 – 1130 | ≥ 1034 |
| Yield Strength, Rp0.2 (MPa) | ≥ 760 | ≥ 827 |
| Elongation, A5 (%) | ≥ 14 | ≥ 17 |
| Reduction of Area, Z (%) | ≥ 40 | ≥ 30 |
| Impact Energy, KV2 (J, +20 degC) | ≥ 40 | ≥ 55 (DVM) |
| Hardness (HBW) | ≤ 311 (annealed) | 302 – 352 |
Minimum Yield Strength at Elevated Temperature (Rp0.2, +QT, d≤160mm, per EN 10269)
| 50 degC | 100 degC | 200 degC | 300 degC | 400 degC | 450 degC | 500 degC | 550 degC |
|---|---|---|---|---|---|---|---|
| 730 MPa | 680 MPa | 655 MPa | 650 MPa | 610 MPa | 560 MPa | 505 MPa | 400 MPa |