GB 712 Grade AH500 Introduce

GB 712 Grade AH500 is mainly used for shipbuilding and marine engineering structures, as well as some other high tensile strength steels. With good malleability, machinability and welding ability, GB 712 Grade AH500 is commonly used for shipbuilding, construction,building structure,pressure vessel and boiler, automobile, agriculture, railways, bridges and so on.

Smelting temperature:1539°C - 1844°C

Application:Structural steel for hull

GB 712 Grade AH500 Material Chemical Composition

The chemical composition of the GB 712 Grade AH500 steel are as follows:

ElementMinMax
Silicon (Si)-0.5500
Sulfur (S)-0.0300
PhOsphorus (P)-0.0300
Nitrogen (N)-0.0200
Manganese (Mn)-1.7000
Carbon (C)-0.2100

GB 712 Grade AH500 Material Mechanical Properties

The mechanical properties of the GB 712 Grade AH500 steel are as follows:

YieldRp0.2 ≤ 467 (MPa)
TeileRm≤ 891 (MPa)
ImpactKV/Ku23(J)
ElongationA33%
Reduction in cross section on fractureZ34%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)442

GB 712 Grade AH500 Material Thermal Properties

The thermal performance parameters of the GB 712 Grade AH500 steel are as follows:

Temperature (°C)14565632
Modulus of elasticity (GPa)-735-
Mean coefficient of thermal expaion ×10-6/(°C)--24
Thermal conductivity (W/m·°C)-21.333.2
Specific thermal capacity (J/kg·°C)-143-
Specific electrical resistivity (Ω mm²/m)0.31--
Deity (kg/dm³)--231
Poisson’s coefficient, ν--334