ASTM A516/A516M A516 Grade 70 Introduce
ASTM A516/A516M A516 Grade 70 steel is a type of carbon alloy steel used for pressure vessel application. It belongs to the group of mild steels. It is widely used in the industrial and commercial sector for a variety of operations. This includes petrochemical, process and transport industries. The steel is suitable for manufacturing boilers, pressure vessels, storage tanks, and heat exchangers. It is noted for having excellent toughness and fatigue strength. Similarly, it also has excellent weldability and low temperature properties.
Smelting temperature:1776°C - 1583°C
Application:Medium and high temperature pressure vessel plate, carbon steel
ASTM A516/A516M A516 Grade 70 Material Mechanical Properties
ASTM A516/A516M A516 Grade 70 steel has a number of advantages, including:
• High strength at low temperature – The steel has a low temperature strength which makes it suitable for applications in extreme temperatures.
• Corrosion resistance – The steel is highly resistant to corrosion and can be used in corrosive environments.
• Weldability – The steel is highly weldable making it a popular choice for welding operations.
• toughness – The steel is noted for its toughness making it ideal for use in parts and components susceptible to breaking due to impact.
• Low maintenance – The steel requires very little maintenance throughout its lifetime and is very easy to clean.
The mechanical properties of the ASTM A516/A516M A516 Grade 70 steel are as follows:
| YieldRp0.2 | 888 (≥)(MPa) |
| TeileRm | 328 (≥)(MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 422 |
ASTM A516/A516M A516 Grade 70 Material Thermal Properties
The thermal performance parameters of the ASTM A516/A516M A516 Grade 70 steel are as follows:
| Temperature (°C) | 32 | 919 | 851 |
| Modulus of elasticity (GPa) | - | 589 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 22.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 131 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 111 |
| Poisson’s coefficient, ν | - | - | 422 |
ASTM A516/A516M A516 Grade 70 Material Machining Technology
Drilling is a useful technique for creating holes in ASTM A516/A516M A516 Grade 70 steel. High-speed steel (HSS) tools are best suited for drilling the material, as they provide excellent wear resistance and can be sharpened multiple times. The cutting parameters, such as cutting speed, feed rate, and depth of cut, should be adjusted according to the hardness of the material.