ASTM A684/A684M Grade 1075 Introduce
ASTM A684/A684M is a steel standard developed for use in high-strength steel plates, bars, and shapes. It was designed for Structural, Bridge, and Pressure Vessel applications and contains requirement for chemical composition and mechanical properties along with product marking and testing. The standard provides reliable performance for specified materials in its applications.
Smelting temperature:1898°C - 1949°C
Application:Cold rolled high carbon steel strip
ASTM A684/A684M Grade 1075 Material Chemical Composition
The chemical composition of the ASTM A684/A684M Grade 1075 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | 0.7000 | 0.8000 |
| Manganese (Mn) | 0.4000 | 0.7000 |
| PhOsphorus (P) | - | 0.0300 |
| Sulfur (S) | - | 0.0350 |
| Silicon (Si) | 0.1500 | 0.3000 |
| Nickel (Ni) | - | 0.3000 |
| Chromium (Cr) | - | 0.2500 |
| Molybdenum (Mo) | - | 0.1000 |
| Copper (Cu) | - | 0.3000 |
| (Cr+Ni+Cu+Mo) | - | 0.8000 |
| Silicon (Si) | 0.1500 | 0.3000 |
| Nickel (Ni) | - | 0.3000 |
| Molybdenum (Mo) | - | 0.1000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | - | 0.2500 |
ASTM A684/A684M Grade 1075 Material Mechanical Properties
ASTM A684/A684M Grade 1075 steel is highly weldable, which means it can be joined easily with other pieces of steel to make strong and durable connections. Its weldability is mainly attributed to its low carbon content, as carbon is known to reduce weldability. The steel is also resistant to cracking and has excellent tensile strength, making it a great choice for welded structures.
The mechanical properties of the ASTM A684/A684M Grade 1075 steel are as follows:
| YieldRp0.2 | ≤ 957 (MPa) |
| TeileRm | ≤ 481 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 31% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 311 |
ASTM A684/A684M Grade 1075 Material Thermal Properties
The thermal performance parameters of the ASTM A684/A684M Grade 1075 steel are as follows:
| Temperature (°C) | 33 | 321 | 765 |
| Modulus of elasticity (GPa) | - | 364 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 31.3 | 13.2 |
| Specific thermal capacity (J/kg·°C) | - | 443 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 122 |
| Poisson’s coefficient, ν | - | - | 422 |
ASTM A684/A684M Grade 1075 Material Machining Technology
Machining is when the shape, size and finish of a material is changed by the application of cutting tools and other manipulations. It is one of the most important processes in modern manufacturing, and at the same time one of the most complex. ASTM A684/A684M Grade 1075 is a type of steel – and more specifically, a carbon steel alloy – that is widely used in many different industries such as automotive, medical and aerospace.