ASTM A176 Type XM-27 Introduce
ASTM A176 Type XM-27 is an impressive high performance alloy steel with superior weldability and a wide range of applications. It has been widely adopted due to its good thermal resistance, high strength to weight ratio, and excellent formability and machinability. ASTM A176 Type XM-27 can be used for a variety of applications such as components and parts used in the automotive and heavy truck industries, as well as in the military and aerospace sectors. The steel has also been used in heat treat furnaces, pressure vessels, and gas turbines.
Smelting temperature:1488°C - 1745°C
Application:Stainless steel and heat-resistant chrome steel, sheet and strip
ASTM A176 Type XM-27 Material Chemical Composition
The chemical composition of the ASTM A176 Type XM-27 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.4000 |
| Sulfur (S) | - | 0.0200 |
| PhOsphorus (P) | - | 0.0200 |
| (Ni+Cu) | - | 0.5000 |
| Nickel (Ni) | - | 0.5000 |
| Niobium (Nb) | 0.0500 | 0.2000 |
| Nitrogen (N) | - | 0.0150 |
| Molybdenum (Mo) | 0.7500 | 1.5000 |
| Manganese (Mn) | - | 0.4000 |
| Copper (Cu) | - | 0.2000 |
| Chromium (Cr) | 25.0000 | 27.5000 |
| Carbon (C) | - | 0.0100 |
ASTM A176 Type XM-27 Material Mechanical Properties
The mechanical properties of the ASTM A176 Type XM-27 steel are as follows:
| YieldRp0.2 | ≤ 372 (MPa) |
| TeileRm | ≤ 644 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 21% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 411 |
ASTM A176 Type XM-27 Material Thermal Properties
The thermal performance parameters of the ASTM A176 Type XM-27 steel are as follows:
| Temperature (°C) | 23 | 675 | 484 |
| Modulus of elasticity (GPa) | - | 852 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 12.2 |
| Specific thermal capacity (J/kg·°C) | - | 421 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 331 |
| Poisson’s coefficient, ν | - | - | 431 |