Supreme Steels

30KHGSA

Product Description:

30KHGSA is a high-strength, low-alloy structural steel widely used in industries that require durable and wear-resistant materials. Known for its high mechanical strength and excellent resistance to wear and fatigue, 30KHGSA is commonly applied in the production of automotive components, aerospace parts, and heavy machinery.

Chemical Composition:

Element Composition (%)
Carbon (C) 0.28–0.34
Chromium (Cr) 0.80–1.10
Manganese (Mn) 0.80–1.10
Silicon (Si) 0.80–1.10
Nickel (Ni) ≤ 0.30
Phosphorus (P) ≤ 0.035
Sulfur (S) ≤ 0.035
Iron (Fe) Balance

Mechanical Properties:

Property Value
Yield Strength ≥ 980 MPa
Ultimate Tensile Strength (σᵤ) 1180–1370 MPa
Elongation (δ₅) ≥ 10%
Impact Toughness (KCU) ≥ 50 J/cm²
Hardness (HB) 300–350 (after heat treatment)

Physical Properties:

Property Value
Density 7.85 g/cm³
Melting Point ~1450°C
Thermal Conductivity 40 W/m·K
Specific Heat 460 J/kg·K

Heat Treatment:

Applications:

Corrosion Resistance

30KHGSA exhibits moderate corrosion resistance in atmospheric conditions. For improved corrosion protection, it is often coated or treated with anti-corrosion layers such as galvanization or painting.