30CrMnSiA Alloy Steel Round Bar GB 3077 Forged Bright OD 20-300mm Quenched Tempered

Product Overview

30CrMnSiA is a chromium-manganese-silicon high-strength alloy structural steel complying with GB/T 3077. After quenching and tempering it provides high strength, good toughness and excellent hardenability, making it a widely used material for demanding aerospace, machinery and structural applications. Available as forged, hot rolled or bright finished round bar with full traceability.

Key Selling Points

• High Strength — tensile strength up to 1080 MPa after quenching and tempering.
• Good Hardening Ability — suitable for high-load structural components.
• Excellent Toughness — reliable performance under dynamic and impact loads.
• Precise Dimension Control — forged or bright finish with tight tolerance.
• Full Traceability — mill test certificate and third-party inspection (SGS / BV) available.

Specifications

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Applications

30CrMnSiA round bar is widely used for aircraft and aerospace structural parts, high-strength bolts and nuts, gears, shafts, connecting rods, welding structures and general machinery components where high strength combined with good toughness is required.

Why Choose Us

• Stable stock and fast delivery for both standard and customized sizes.
• Strict quality control with mill test certificate and third-party inspection.
• Competitive factory-direct pricing and professional export packaging.