ASTM A1031/A1031M Grade 4130 Introduce

ASTM A1031/A1031M Grade 4130 is a specification for Structural Steel with Improved Toughness, commonly known as "Tough Steel". It is a high strength steel that has good ductility and toughness characteristics. Its chemical composition consists of a small amount of carbon, larger amounts of manganese and chromium, and other trace elements such as phosphorus and sulfur. The steel is primarily used in applications where high strength and good ductility are required, such as bridge girders, crane booms and truck frames.

Smelting temperature:1823°C - 1269°C

Application:Hot rolled heavy-duty tin coil drawing and structural alloy steel sheet and strip specifications

ASTM A1031/A1031M Grade 4130 Material Chemical Composition

The chemical composition of the ASTM A1031/A1031M Grade 4130 steel are as follows:

ElementMinMax
Silicon (Si)0.15000.3000
Sulfur (S)-0.0250
PhOsphorus (P)-0.0250
Molybdenum (Mo)0.15000.2500
Manganese (Mn)0.70000.9000
Chromium (Cr)0.80001.1000
Carbon (C)0.33000.3800

ASTM A1031/A1031M Grade 4130 Material Mechanical Properties

The mechanical properties of the ASTM A1031/A1031M Grade 4130 steel are as follows:

YieldRp0.2 ≤ 947 (MPa)
TeileRm≤ 317 (MPa)
ImpactKV/Ku23(J)
ElongationA43%
Reduction in cross section on fractureZ33%
As-Heat-Treated ConditionSolution and Aging, Annealing, Ausaging, Q+T,etc
Brinell hardness (HBW)423

ASTM A1031/A1031M Grade 4130 Material Thermal Properties

The thermal performance parameters of the ASTM A1031/A1031M Grade 4130 steel are as follows:

Temperature (°C)43959895
Modulus of elasticity (GPa)-452-
Mean coefficient of thermal expaion ×10-6/(°C)--42
Thermal conductivity (W/m·°C)-32.332.2
Specific thermal capacity (J/kg·°C)-234-
Specific electrical resistivity (Ω mm²/m)0.13--
Deity (kg/dm³)--424
Poisson’s coefficient, ν--332