30CrMnSiA Alloy Steel Plate: High-Performance Solution for Critical Structural Applications
30CrMnSiA alloy steel plate is a premium quenched-and-tempered (Q&T) structural steel renowned for its exceptional strength, wear resistance, and adaptability to high-stress environments12. Widely utilized in aerospace, military, and automotive sectors, this Cr-Mn-Si alloy combines precise heat treatment compatibility with superior mechanical properties, making it indispensable for mission-critical components.
📞 Ready to Order?
Tell us your project needs—size, grade, coating or end prep— and we’ll provide:
-
Tailored specifications
-
Competitive quotes
-
Fast delivery schedules
Let’s partner up to supply your 30CrMnSiA Alloy Steel Plate—request a quote or sample today!
Key Features & Technical Advantages
- Optimized Composition:
- Chromium (0.80–1.10%): Enhances wear resistance and high-temperature stability.
- Manganese (0.80–1.10%): Improves hardenability and tensile strength.
- Silicon (0.90–1.20%): Boosts oxidation resistance and hardenability while reducing brittle fracture risks.
- Mechanical Properties (Post Q&T):
- Tensile Strength: 1,080–1,180 MPa – Ideal for components requiring resistance to dynamic loads.
- Yield Strength: ≥835 MPa – Minimizes deformation under extreme stress.
- Elongation: ≥10% – Balances ductility with rigidity for complex forming
- Impact Toughness: ≥39 J at 20°C – Ensures reliability in low-temperature environments.
- Heat Treatment Flexibility:
- Quenching: 880°C oil cooling for uniform microstructure.
- Tempering: 520°C water/oil cooling to optimize toughness and residual stress relief.
- Hardness: 217–255 HB (annealed); 300–350 HB (Q&T).
Applications Across Industries
30CrMnSiA’s unique properties suit high-performance scenarios:
- Aerospace: Landing gear, aircraft frames, and engine mounts.
- Military: Armored vehicle parts, firearm components, and missile systems.
- Automotive: Gears, crankshafts, and drivetrain assemblies.
- Industrial Machinery: Hydraulic press shafts, mining equipment, and high-stress bearings.
Global Equivalents & Standards
| Standard | Equivalent Grade | Key Specifications |
|---|---|---|
| China (GB) | 30CrMnSiA | GJB2150A-2015, GB/T3077-1988 |
| USA (AISI/SAE) | 4130 | ASTM A29 (approximate) |
| Germany (DIN) | 1.7216 | DIN 17200 |
| Japan (JIS) | SCM430 | JIS G4105 |
Chemical Composition & Quality Control
| Element | Composition (%) | Function |
|---|---|---|
| Carbon (C) | 0.28–0.34 | Enhances hardness and wear resistance |
| Silicon (Si) | 0.90–1.20 | Improves strength and oxidation resistance |
| Chromium (Cr) | 0.80–1.10 | Boosts corrosion and heat resistance |
| Phosphorus (P) | ≤0.035 | Minimized to prevent brittleness |
| Sulfur (S) | ≤0.035 | Controlled for optimal weldability. |
- Testing Protocols: Ultrasonic flaw detection, Rockwell/Brinell hardness testing, and Charpy impact tests
- Certification: EN 10204/3.1 mill certificates with full traceability.
Production & Supply
- Dimensions:
- Thickness: 6–200 mm
- Width: 500–4,000 mm
- Length: 1,000–12,000 mm.
- Monthly Capacity: 1,000+ tons – Ensures rapid delivery for bulk orders.
- Customization: Available in normalized, annealed, or Q&T conditions per application requirements.
Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.