ASTM A276 309Cb Introduce
ASTM A276 309Cb is a popular grade of stainless steel used for a variety of applications. It features a combination of iron, chromium, nickel, and molybdenum, giving it excellent mechanical, heat, and oxidation resistances, as well as good corrosion resistance. Its physical properties vary depending on composition and treatment, but it has a high strength-to-weight ratio and is relatively easy to machine. All these properties make ASTM A276 309Cb a versatile material for use in many different industries and applications.
Smelting temperature:1716°C - 1249°C
Application:Stainless steel bars and profiles
ASTM A276 309Cb Material Chemical Composition
The chemical composition of the ASTM A276 309Cb steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 12.0000 | 16.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 22.0000 | 24.0000 |
| (Cb) | - | 1.1000 |
| Carbon (C) | - | 0.0800 |
ASTM A276 309Cb Material Mechanical Properties
The mechanical properties of the ASTM A276 309Cb steel are as follows:
| YieldRp0.2 | ≤ 964 (MPa) |
| TeileRm | ≤ 852 (MPa) |
| ImpactKV/Ku | 13(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 31% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 332 |
ASTM A276 309Cb Material Thermal Properties
The thermal performance parameters of the ASTM A276 309Cb steel are as follows:
| Temperature (°C) | 31 | 333 | 566 |
| Modulus of elasticity (GPa) | - | 821 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 31 |
| Thermal conductivity (W/m·°C) | - | 42.3 | 11.2 |
| Specific thermal capacity (J/kg·°C) | - | 444 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 141 |
| Poisson’s coefficient, ν | - | - | 244 |
ASTM A276 309Cb Material Machining Technology
ASTM A276 309Cb is a specification for stainless steel bars and shapes. It includes here grades of stainless steel, chemistry limits, heat treat requirements and mechanical properties. It gives guidance on forming and machining as well as for welding and heat-treating.