ASTM A517/A517M A517 Grade H Introduce
ASTM A517/A517M A517 Grade H is a low-alloy, high-strength steel plate with a tensile range of 110-130 ksi (758 - 896 MPa). The plate's thickness usually ranges from 5/16" to 2", with a minimum yield strength of 65 ksi (448 MPa). ASTM A517/A517M A517 Grade H steel is designed for use in pressure vessels and boilers in applications that require higher strength and improved toughness and weldability.
Smelting temperature:1434°C - 1225°C
Application:Tempered and quenched high-strength alloy steel sheets for pressure vessels
ASTM A517/A517M A517 Grade H Material Mechanical Properties
ASTM A517/A517M A517 Grade H steel has excellent mechanical properties due to its combination of specified chemical composition and processing controls used during hot-forming and cold-working. The tensile strength of the material is in the range of 115-135 ksi, and its yield strength is in the range of 75-100 ksi. The material also exhibits excellent ductility, with an elongation range of 16-25%, and a reduction of area of 45-55%.
The mechanical properties of the ASTM A517/A517M A517 Grade H steel are as follows:
| YieldRp0.2 | ≤ 673 (MPa) |
| TeileRm | ≤ 838 (MPa) |
| ImpactKV/Ku | 34(J) |
| ElongationA | 13% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 141 |
ASTM A517/A517M A517 Grade H Material Thermal Properties
The thermal performance parameters of the ASTM A517/A517M A517 Grade H steel are as follows:
| Temperature (°C) | 12 | 498 | 622 |
| Modulus of elasticity (GPa) | - | 354 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 21.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 312 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 421 |
| Poisson’s coefficient, ν | - | - | 243 |
ASTM A517/A517M A517 Grade H Material Machining Technology
ASTM A517/A517M A517 Grade H steel is a low-alloy quenched and tempered high-strength steel that has been used in a variety of applications, such as bridges, rail cars, off-highway vehicles, pressure vessels, and other structures where high strength and improved cold working properties are required.