BS S156 Steel (16NCD17)
Home / BS S156
Products
Special Steels Division
Wire Division
BS S156 (1.6722, MSRR 6010)
BS S156 is a low-alloy steel developed under British Standards specifically for aerospace applications. It is a manganese-molybdenum steel supplied in the annealed condition and intended for use in heat-treated condition (usually hardened and tempered). good strength, toughness, and machinability, BS S156 is used where moderate strength with good workability is required.
Chemical Composition:
| Element | Min | Max |
|---|---|---|
| C | 0.14 | 0.18 |
| Si | 0.1 | 0.35 |
| Mn | 0.25 | 0.55 |
| P | 0.0 | 0.015 |
| S | 0 | 0.012 |
| Cr | 1.00 | 1.4 |
| Mo | 0.2 | 0.3 |
| Ni | 3.8 | 4.3 |
Mechanical Properties:
| Property | Value |
|---|---|
| 0.2% Proof Stress MPa | 1030 |
| Tensile Strength MPa | 1320 to 1520 |
| Elongation% | 11 |
| Reduction of area | 40% |
| Izod* Impact ft Ibf | 30 |
Physical Properties:
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Modulus of Elasticity | ~205 GPa |
| Thermal Conductivity | ~42 W/m·K |
| Specific Heat Capacity | ~460 J/kg·K |
| Thermal Expansion | ~12.0 µm/m·°C |
| Melting Point | ~1450 °C |
Heat Treatment:
Carburise at 900°C • Oil quench from 825°C and temper at 190°C.
(N.B. a sub zero treatment at -70°C before tempering is recommended)
(N.B. a sub zero treatment at -70°C before tempering is recommended)
Applications:
- Aircraft structural parts
- Engine brackets, levers, and rods
- Lightly stressed gears and components
- High-strength, low-weight parts in aerospace and defense industries
Corrosion Resistance
- Low corrosion resistance — similar to other low-alloy steels
- Requires protective coating (e.g., oil, plating, or paint) in corrosive environments