GOST 30chgsa seamless steel pipe chemical composition and mechanical properties
Hit：52026-03-19 10:03:59
GOST 30chgsa seamless steel pipe chemical composition and mechanical properties
GOST 30CHGSA 30 ХГСА belongs to the Russian standard and is a high-strength alloy structural steel commonly used in the manufacture of seamless steel pipes that can withstand high stress and impact loads. Its chemical composition and mechanical properties are mainly based on the Russian standard GOST 4543-71 or similar specifications.
mechanical properties
Tensile strength σ b: ≥ 930 MPa (approximately 95 kgf/mm ²)
Yield strength σ s: ≥ 735 MPa (approximately 75 kgf/mm ²)
Elongation rate δ 5: ≥ 12%
Shrinkage rate of cross-section: ≥ 50%
Impact energy Akv: ≥ 71 J
Hardness: ≤ 229 HB (annealed or heat-treated state)
The above mechanical performance data is based on the implementation of GB/T 3077-1988 (corresponding to 30CrMoA) and industrial practice analogous to GOST 30ChHSA. As the original GOST standard was not fully disclosed in authoritative public materials, the performance range of similar alloy steels was referenced here
Chemical composition (mass fraction,%)
Carbon (C): 0.28%~0.34%
Silicon (Si): 0.90%~1.20%
Manganese (Mn): 0.80%~1.10%
Chromium (Cr): 0.80%~1.10%
Nickel (Ni): ≤ 0.030% (allowable residual)
Copper (Cu): ≤ 0.025% (allowable residual)
Phosphorus (P): ≤ 0.025%
Sulfur (S): ≤ 0.025%
Application features
Suitable for high-pressure, low-temperature, and high wear resistant working conditions, such as hydraulic supports, gears, shafts, connectors, etc.
Has good weldability, toughness, and fatigue resistance, but attention should be paid to controlling temper brittleness.
To access the original GOST standards, you can visit the Russian National Standards Database: GOST.RU
