ASTM A314 Grade 347 Introduce
ASTM A314 Grade 347 is an American Standard Material Specification for an austenitic steel grade which offers exceptional strength, formability, weldability and good toughness. Due to its excellent formability, ASTM A314 Grade 347 is ideal for the fabrication of smaller and complex components. However, care must be taken with regard to selecting the suitable welding procedure and selecting a matching or slightly over matching filler metal for welding. With the correct selection of welding filler materials, manufacturers are assured of components with exceptional durability, quality, and performance for many industrial applications. The grade is particularly suitable for application in fuel tanks and pressure vessels because it provides superior corrosion resistance, oxidation resistance, and stress corrosion cracking and sour gas resistance.
Smelting temperature:1126°C - 1314°C
Application:Specification for stainless steel and steel rods for forging and heat
ASTM A314 Grade 347 Material Chemical Composition
The chemical composition of the ASTM A314 Grade 347 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 9.0000 | 13.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 17.0000 | 19.0000 |
| Carbon (C) | - | 0.0800 |
ASTM A314 Grade 347 Material Mechanical Properties
The mechanical properties of the ASTM A314 Grade 347 steel are as follows:
| YieldRp0.2 | ≤ 122 (MPa) |
| TeileRm | ≤ 999 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 44% |
| Reduction in cross section on fractureZ | 13% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 322 |
ASTM A314 Grade 347 Material Thermal Properties
The thermal performance parameters of the ASTM A314 Grade 347 steel are as follows:
| Temperature (°C) | 32 | 713 | 213 |
| Modulus of elasticity (GPa) | - | 593 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 32.2 |
| Specific thermal capacity (J/kg·°C) | - | 431 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.31 | - | - |
| Deity (kg/dm³) | - | - | 312 |
| Poisson’s coefficient, ν | - | - | 233 |