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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 8630 is a low-alloy steel belonging to the nickel-chromium-molybdenum family, characterized by excellent hardenability and through-hardening properties. The combination of nickel, chromium, and molybdenum provides superior toughness, strength, and resistance to temper brittleness compared to plain carbon steels.
Heat Treatment Processing
MetalZenith's heat treatment process for AISI 8630 involves austenitizing at 845-870°C, followed by oil quenching to achieve martensitic structure. Tempering is performed at 540-650°C depending on desired hardness levels. Our controlled atmosphere furnaces ensure uniform heating and prevent decarburization, while precise quench media selection optimizes distortion control.
Manufacturing Process Excellence
Our AISI 8630 production utilizes electric arc furnace melting with secondary refining through ladle metallurgy and vacuum degassing. Continuous casting ensures homogeneous chemical composition, while controlled rolling and cooling optimize grain structure. Post-processing includes precision machining, surface treatments, and comprehensive quality testing including ultrasonic examination for internal soundness.
Quality Standards & Certifications
MetalZenith maintains compliance with international standards including ASTM A29, SAE J404, and EN 10083-3. Our quality management system encompasses incoming raw material inspection, in-process monitoring, and final product testing. Each shipment includes certified mill test certificates with complete chemical analysis, mechanical properties, and traceability documentation meeting aerospace, automotive, and industrial requirements.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.28 - 0.33 |
| Manganese (Mn) | 0.70 - 1.00 |
| Silicon (Si) | 0.15 - 0.35 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Chromium (Cr) | 0.40 - 0.70 |
| Nickel (Ni) | 0.40 - 0.70 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Copper (Cu) | ≤ 0.35 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Condition | Value |
|---|---|---|
| Tensile Strength | Quenched & Tempered | 1035 - 1380 MPa |
| Yield Strength (0.2% offset) | Quenched & Tempered | 895 - 1240 MPa |
| Elongation | Quenched & Tempered | 12 - 18% |
| Reduction of Area | Quenched & Tempered | 45 - 60% |
| Hardness | Quenched & Tempered | 302 - 388 HB |
| Impact Energy (Charpy V-notch) | Room Temperature | ≥ 54 J |
| Fatigue Limit (10&sup7; cycles) | Rotating Beam | 480 - 620 MPa |
| Elastic Modulus | Room Temperature | 200 - 210 GPa |
| Poisson's Ratio | Room Temperature | 0.27 - 0.30 |
🔬 Physical Properties
| Property | Temperature | Value |
|---|---|---|
| Density | 20°C | 7.85 g/cm³ |
| Melting Point | - | 1420 - 1460°C |
| Thermal Conductivity | 20°C | 42 W/m·K |
| Thermal Conductivity | 100°C | 44 W/m·K |
| Specific Heat Capacity | 20°C | 460 J/kg·K |
| Thermal Expansion Coefficient | 20-100°C | 12.5×10-6/K |
| Thermal Expansion Coefficient | 20-200°C | 13.2×10-6/K |
| Electrical Resistivity | 20°C | 0.25 µΩ·m |
| Magnetic Permeability | 20°C | Ferromagnetic |
| Curie Temperature | - | 770°C |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, square bars, flat bars, plates, sheets, forgings, tubes |
| Round Bar Diameter | 6 mm - 500 mm |
| Square Bar Size | 10 mm - 300 mm |
| Flat Bar Dimensions | Thickness: 5-100 mm, Width: 20-500 mm |
| Plate Thickness | 8 mm - 200 mm |
| Sheet Thickness | 0.5 mm - 8 mm |
| Length | Up to 12 meters (custom lengths available) |
| Standards | ASTM A29, ASTM A322, SAE J404, EN 10083-3, JIS G4053 |
| Surface Finish | Hot rolled, cold drawn, peeled, ground, machined |
| Dimensional Tolerance | ±0.1 mm to ±0.5 mm (depending on size and finish) |
| Heat Treatment Condition | Annealed, normalized, quenched & tempered, as-rolled |
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Our Advantages in Processing AISI 8630
Advanced Vacuum Degassing Technology
MetalZenith employs state-of-the-art vacuum degassing and ladle refining processes to achieve ultra-low inclusion content and superior steel cleanliness, resulting in enhanced fatigue resistance and improved mechanical properties in AISI 8630 products.
Comprehensive Heat Treatment Services
Our in-house heat treatment facilities feature computer-controlled furnaces with precise temperature uniformity and atmosphere control, enabling optimized quenching and tempering cycles to achieve specified mechanical properties and microstructural requirements for AISI 8630.
Custom Processing & Global Supply Chain
MetalZenith offers extensive customization capabilities including precision machining, surface treatments, and non-standard dimensions. Our global logistics network ensures reliable delivery worldwide with full traceability and technical support throughout the supply chain.
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