S151 / S151D (Jethete M152 / MSRR 6503) , UNS S64152
Jethete M152 is a high-strength, creep and corrosion-resistant stainless steel, hardened and tempered for service up to 560°C. Its exceptional toughness and creep rupture strength make it ideal for highly stressed aerospace components, including turbine blades, discs, fasteners (bolts/screws), and rings.
Standard | Grade | UNS | EN (EU) | Werkstoff Nr. |
---|---|---|---|---|
AMS | AMS 5719 | S64152 | - | - |
MSRR | MSRR 6503 | - | - | - |
DIN | 1.4939 | - | X12CrNiMo12 | 1.4939 |
TLV | 1.4938 | - | X12CrNiMoV12-3 | 1.4938 |
BS | BS S151 / S151D | - | - | - |
French AFNOR | Z12CN12-02 | - | - | - |



Table of Contents
What is S151 / S151D (Jethete M152 / MSRR 6503) , UNS S64152?
S151 / S151D (Jethete M152 / MSRR 6503) Stainless Steel
BS S151 (Jethete M152) is a high-performance precipitation-hardening stainless steel designed for aerospace applications. It offers exceptional creep resistance, corrosion resistance, and mechanical strength at elevated temperatures (up to 560°C). Commonly used in turbine blades, discs, and fasteners.
Applications
- Turbine blades & discs
- High-stress bolts (AMS 5719)
- Aerospace fasteners (MSRR 6503)
- Exhaust systems (up to 560°C)
Chemical Composition (%)
Element | Min (%) | Max (%) | Typical (%) |
---|---|---|---|
C | - | 0.12 | 0.08 |
Cr | 11.0 | 13.0 | 12.0 |
Ni | 2.0 | 3.0 | 2.5 |
Mo | 1.0 | 2.0 | 1.5 |
Mn | - | 1.0 | 0.5 |
Si | - | 1.0 | 0.3 |
P | - | 0.04 | 0.02 |
S | - | 0.03 | 0.01 |
Fe | Balance | ~82.0 |
Material Properties
Room Temperature Properties (Tempered Condition - BS S151D)
Property | Value (Typical) | Test Standard |
---|---|---|
Tensile Strength (UTS) | 850-1000 MPa | ASTM E8 |
Yield Strength (0.2%) | 700-850 MPa | ASTM E8 |
Elongation (% in 50mm) | 15-20% | ASTM E8 |
Hardness (HRC) | 28-35 | ASTM E18 |
Impact Toughness (Charpy) | 50-70 J | ASTM E23 |
Elevated Temperature Properties
Temperature (°C) | Creep Rupture Strength (1000h, MPa) | Oxidation Resistance |
---|---|---|
500 | 300 | Excellent |
560 | 200 | Good |
600 | 120 | Limited |
Physical Properties
Property | Value |
---|---|
Density (g/cm³) | 7.8 |
Melting Range (°C) | 1400-1450 |
Thermal Conductivity (W/m·K @ 20°C) | 15.0 |
Electrical Resistivity (Ω·m) | 0.75 × 10⁻⁶ |
Magnetic Permeability | Austenitic (Non-magnetic) |
Heat Treatment
- Softening (BS S151A): 670-720°C × 6h, air cool
- Hardening: 1050°C ±10°C, air cool
- Tempering (BS S151D): 650°C ±5°C, air cool
Processing Performance
- Machinability: 60% of AISI 304 (use carbide tools, low speeds)
- Welding: TIG/MIG possible with matching filler (post-weld heat treatment required)
- Forging: 1050-900°C (avoid <850°C to prevent cracking)
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