ASTM A656/A656M A656 Type 7 Grade 100 Introduce
ASTM A656/A656M A656 Type 7 Grade 100 steel is a low-alloy, high-strength steel used for structural applications. It has a wide range of chemical and mechanical properties which make it a great choice for many applications. The carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum and vanadium content are all important chemical properties that help to determine the mechanical properties, welding characteristics, hardness and wear resistance of the steel. The mechanical properties of ASTM A656/A656M A656 Type 7 Grade 100 steel make it a great choice for many applications, and its weldability and corrosion resistance make it even more suitable.
Smelting temperature:1383°C - 1518°C
Application:High-strength low-alloy hot-rolled structural steel plate with improved forgeability
ASTM A656/A656M A656 Type 7 Grade 100 Material Chemical Composition
The chemical composition of the ASTM A656/A656M A656 Type 7 Grade 100 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | - | 0.1800 |
| Manganese (Mn) | - | 1.6500 |
| PhOsphorus (P) | - | 0.0250 |
| Sulfur (S) | - | 0.0300 |
| Silicon (Si) | - | 0.6000 |
| Vanadium (V) | - | 0.1500 |
| Titanium (Ti) | - | 0.1500 |
| Nitrogen (N) | - | 0.0300 |
| Niobium (Nb) | - | 0.1000 |
| (Nb+V+Ti) | 0.0080 | 0.2000 |
| Sulfur (S) | - | 0.0350 |
ASTM A656/A656M A656 Type 7 Grade 100 Material Mechanical Properties
Yield strength is an indication of a material's ability to resist deformation when subject to an applied stress. Yield strength, measured in ksi, is one of the most important properties of ASTM A656/A656M A656 Type 7 Grade 100 steel. It is the stress at which a piece of the material will no longer continue to elongate in length but will instead deform irreversibly. The minimum specified yield strength for ASTM A656/A656M A656 Type 7 Grade 100 steel is 50 ksi.
The mechanical properties of the ASTM A656/A656M A656 Type 7 Grade 100 steel are as follows:
| YieldRp0.2 | ≤ 993 (MPa) |
| TeileRm | ≤ 921 (MPa) |
| ImpactKV/Ku | 43(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 322 |
ASTM A656/A656M A656 Type 7 Grade 100 Material Thermal Properties
The thermal performance parameters of the ASTM A656/A656M A656 Type 7 Grade 100 steel are as follows:
| Temperature (°C) | 24 | 459 | 224 |
| Modulus of elasticity (GPa) | - | 594 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 142 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.33 | - | - |
| Deity (kg/dm³) | - | - | 313 |
| Poisson’s coefficient, ν | - | - | 323 |
ASTM A656/A656M A656 Type 7 Grade 100 Material Machining Technology
Welding of ASTM A656/A656M A656 Type 7 Grade 100 can be done with conventional welding techniques. A preheat of materials prior to welding is generally not required. Post- weld heat treatment should be considered if any part of the fabrications require a low temperature toughness test. Common welding techniques for ASTM A656/A656M A656 Type 7 Grade 100 are arc welding processes such as shielded metal arc welding, gas metal arc welding, and flux-cored arc welding.