内容
AISI 8630 Alloy Steel | UNS G86300 Hot Rolled Bar Supplier
- ジョン
AISI 8630 alloy steel is a dependable and versatile material for critical industrial applications. SteelPro Group takes pride in supplying premium-grade 8630 alloy steel bars, rods, and plates. Whether you need steel for oilfield equipment, renewable energy projects, or heavy machinery, our products deliver quality and reliability.
This article explains the key properties and applications of AISI 8630 steel. It also highlights how SteelPro’s expertise ensures outstanding service and unmatched quality.
What Is AISI 8630 Steel?
AISI 8630 is a low-alloy steel with medium carbon content (0.28–0.33%). Its blend of nickel, chromium, and molybdenum improves hardenability while providing a balance of strength, toughness, and wear resistance after heat treatment. With a tensile strength of 620 MPa and excellent fatigue resistance, it performs well under dynamic loads. The alloy is 70% machinable in its annealed state and is well-suited for forging, rolling, and welding (with preheating). These qualities make it ideal for parts such as connecting rods, bolts, shafts, and other high-stress components.
8630 Alloy Steel Key Characteristics
- High Strength-to-Weight Ratio: Optimized for load-bearing parts.
- Excellent Toughness: Resists impact and fatigue in harsh environments.
- Superior Hardenability: Attains uniform properties via oil and water quenching.
- Machinability: Rated at 70%.
- Weldability: Compatible with common welding techniques post-preheating.
AISI 8630 Steel Equivalent Grades and Standards
At SteelPro Group, we ensure that our products meet international standards so that you can count on their quality and performance. The grades listed here comply with well-known global specs, ensuring that our products are up to the job, no matter the industry.
| スタンダード | グレード | Grade Belong to the Industry |
| 国連 | J13051 | キャスティング |
| SAE | 8630 | Bar, Tube, Sheet, Strip and Forging |
| AMS | 8630 | Bar and Forging |
| AISI | A732 14Q | キャスティング |
8630 Steel Chemical Composition
| 要素 | 内容 |
| カーボン（C） | 0.28~0.33 |
| ケイ素 (Si) | 0.15~0.35 |
| マンガン (Mn) | 0.7~0.9 |
| リン (P) | ≤0.035 |
| 硫黄（S） | ≤0.04 |
| クロム（Cr） | 0.4~0.6 |
| ニッケル（Ni） | 0.4~0.7 |
| 銅（Cu） | ≤0.35 |
| モリブデン (Mo) | 0.15~0.25 |
8630 Steel Mechanical Properties
| プロパティ | メトリック値 | インペリアル・バリュー |
| 引張強度 | 620MPa | 89900 psi |
| 降伏強度 | 550 MPa | 79800 psi |
| 疲労強度 | 315 MPa | 45700 psi |
| 体積弾性率 | 140GPa | 20300ksi |
| せん断弾性係数 | 72.0 GPa | 10400 ksi |
| 弾性係数 | 190 - 210 GPa | 27557 – 30458 ksi |
| ポアソン比 | 0.27 – 3.0 | 0.27 – 3.0 |
| 破断伸度 | 16% | 16% |
| 硬度、ヌープ | 230 | 230 |
| 硬度、ロックウェルC | 15 | 15 |
| 硬度、ビッカース | 217 | 217 |
| 加工性 | 70% | 70% |
8630 Steel Physical Properties
| プロパティ | メートル単位 | 帝国単位 |
| 密度 | 7.85 g/cm³ | 0.284 lb/in³ |
| 弾性係数 | 200 GPa | 29,000キロ・シー |
| ポアソン比 | 0.29 | 0.29 |
| 熱伝導率 | 42W/m·K | 24 Btu/h·ft·°F |
| Thermal Expansion (20-100°C) | 11.7 µm/m-K | 6.5 µin/in-°F |
8630 Steel Applications
- Oil & Gas Industry: Valve bodies, connectors, hangers, and wellhead equipment requiring corrosion and pressure resistance.
- Wind Energy: Pitch/yaw bearings and gearbox ring gears in turbines.
- Heavy Machinery: Shafts, crankshafts, bolts, and studs demanding strength and fatigue resistance.
- Automotive: Steering knuckles, axle components, and transmission parts.
- General Engineering: Medium-section water-quenched parts and small oil-quenched components.
SteelPro Group customizes 8630 steel products to meet precise specifications for these applications, ensuring reliability in mission-critical systems.
8630 Steel Product Forms and Size
We offer a diverse selection of 8630 alloy steel product forms and sizes. With an extensive inventory that includes rounds, flats, plates, bars, and wire rods, we can meet various project requirements.
ラウンド
- Diameters: 0.25 to 24 inches (6.35 to 609.6 mm)
Flats
- Thicknesses: 0.125 to 12 inches (3.18 to 304.8 mm)
- Widths: 0.5 to 48 inches (12.7 to 1219.2 mm)
プレート
- Thicknesses: 0.25 to 10 inches (6.35 to 254 mm)
- Widths: 12 to 120 inches (304.8 to 3048 mm)
バー
- Lengths: 6 to 40 feet (1829 to 12192 mm)
Wire Rods
- Diameters: 0.093 to 1.75 inches (2.36 to 44.45 mm)
8630 Steel Forging Process
At SteelPro Group, we employ controlled forging techniques to enhance 8630 steel’s structural integrity:
- 予熱: Heat billets to 1150–1250°C (2102–2282°F) to improve plasticity.
- 鍛造: Shape the steel under precise pressure within the austenitic temperature range.
- 冷却: Use air or controlled furnace cooling to refine grain structure and minimize residual stress.
Our state-of-the-art forging facilities ensure dimensional accuracy and superior mechanical performance for high-stress components.
8630 Steel Heat Treatment
アニーリング
- Best choice: Austenitize at 845°C (1550°F), furnace-cool to 730°C (1350°F), then slow-cool to 640°C (1180°F) at 20°C/hr (36°F/hr).
This method produces a microstructure with coarse pearlite and minimal ferrite. The result is improved machinability and toughness. By carefully controlling the cooling rate, the steel gains more uniform properties, making it well-suited for demanding applications.
- Other Option: Iso-anneal at 660°C (1225°F) for improved machinability.
ノーマライゼーション
Heat to 870°C (1600°F), air-cool to refine microstructure.
硬化
Austenitize at 830–870°C (1525–1600°F), and quench in oil/water based on part geometry.
焼き戻し
Reheat to 150–650°C (302–1202°F) to achieve target hardness and stress relief.
Explore Our 8630 Steel Inventory Today
When precision and reliability matter, SteelPro Group delivers. Our AISI 8630 alloy steel products are available in rounds, flats, plates, and custom forgings, backed by ISO-certified manufacturing and rapid global delivery.
Whether you need raw material supply, precision machining, or heat treatment services, our team ensures your project meets the highest standards.
