Welcome to our in-depth exploration of 8620H steel, where we delve into the intricacies of this alloy, catering to the needs of enthusiasts and professionals alike. As a seasoned steel materials technologist and internet marketing expert, I’m excited to guide you through the properties, applications, and advantages of 8620H steel.
Understanding 8620H Steel: Unveiling the Composition
Let’s kick things off by understanding the chemical makeup of AISI 8620H alloy steel. This low Nickel Chromium Molybdenum case-hardening steel boasts a composition that sets it apart from standard carbon steels. Here’s a detailed breakdown:
| Element | Content (%) |
|---|---|
| Iron, Fe | 96.745-98.22 |
| Manganese, Mn | 0.600-0.950 |
| Nickel, Ni | 0.350-0.750 |
| Chromium, Cr | 0.350-0.650 |
| Carbon, C | 0.180-0.230 |
| Silicon, Si | 0.150-0.350 |
| Molybdenum, Mo | 0.150-0.250 |
| Sulfur, S | 0.0400 |
| Phosphorous, P | 0.0350 |
Physical and Mechanical Properties of 8620H Steel
Understanding the physical and mechanical properties is crucial for anyone seeking the perfect steel for their applications. Let’s break down the numbers:
Physical Properties
- Density: 7.85 g/cm³ (Metric) / 0.284 lb/in³ (Imperial)
Mechanical Properties (Annealed Condition)
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 530 MPa | 76900 psi |
| Yield Strength | 385 MPa | 55800 psi |
| Elastic Modulus | 190-210 GPa | 27557-30458 ksi |
| Bulk Modulus | 140 GPa | 20300 ksi |
| Shear Modulus | 80 GPa | 11600 ksi |
| Poisson’s Ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at Break | 31 | 31 |
| Reduction of Area | 31 | 31 |
| Izod Impact | 115 J | 84.8 ft. lb |
| Hardness, Brinell | 149 | 149 |
8620H Steel’s Applications and Heat Treatment
Now that we’ve covered the raw data, let’s explore the practical aspects. AISI 8620H finds its place in small gear parts exposed to low-medium stress. Its versatility extends to various applications, including gears, planet wheels, drive pinions, and shafts.
Heat Treatment Guide
- Carburizing: 880 – 960°C (Oil quenching)
- Intermediate Annealing: 630 – 650°C (Air, Furnace)
- Core Hardening: 860 – 900°C (Oil quenching)
- Case Hardening: 780 – 820°C (Oil quenching)
- Tempering: 150 – 200°C (Air)
Meeting International Standards: 8620H’s Global Compatibility
In the world of steel, adherence to international standards is paramount. AISI 8620H stands tall, aligning with various prestigious designations. Here are the key standards it complies with:
- AS1444 Grade 8620H
- ASTM A29 Grade 8620
- Euronorm Grade 20NiCrMo2-2+HH (Material Number 1.6523/1.6526 under EN 10084)
Whether you’re navigating Australian, American, or European standards, 8620H ensures a seamless fit. This global compatibility showcases the versatility of Otai Special Steel’s offerings, providing you with a reliable and internationally recognized steel solution.
Otai Special Steel Advantages: Your Trusted Partner
As a professional steel provider, Dongguan OTAI Special Steel stands out for several compelling reasons:
- Global Reach: Exporting to over 30 countries, adhering to diverse standards.
- Elite Partnerships: A permanent supplier to top companies globally, including ThyssenKrupp and China National Armaments Industry Corporation.
- Robust Stock: With 4140 sheets, we ensure a daily stock of 800 tonnes.
- Cost Efficiency: Reduce dealer costs by 20%, solving end-user concerns.
- Extensive Experience: Over 20 years of pre-sales and after-sales expertise.
- Quality Assurance: 8 years with zero quality incident complaints, and an 80% customer return rate.
- Efficient Service: 2-hour after-sales response, 2-day earlier shipment, and batch solutions for non-normal excess volume.
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