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SAE8620H Alloy Steel Round Bar with Polished Surface, High Hardenability, and Good Weldability
Product Details
| Model NO. | SAE8620H | Surface Treatment | Polished |
|---|---|---|---|
| Alloy Type | Alloy | Diameter Range | OD 6-630mm |
| Production Capacity | 500tons | Carbon Content | 0.17-0.23 |
| Silicon Content | 0.17-0.37 | Manganese Content | 0.6-0.95 |
| Phosphorus Content | ≤0.035 | Sulfur Content | ≤0.035 |
| Chromium Content | 0.4-0.7 | Molybdenum Content | 0.20-0.30 |
| Copper Content | ≤0.30 | Tensile Strength | ≥980(100) MPa |
| Yield Strength | ≥785(80) MPa | ||
| Highlight | Polished Surface Alloy Steel Round Bar,High Hardenability SAE8620H Round Bar,Good Weldability Bearing Steel Bar |
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Product Description
SAE8620H Alloy Steel Round Bar
SAE8620H is a high-quality alloy construction steel round bar with excellent hardenability,
non-brittle characteristics after tempering, superior weldability, and outstanding machinability
and cold strain plasticity. This low-carbon nickel chromium molybdenum alloy offers exceptional
carburized properties, formability, and weldability, making it the most widely used carburizing
alloy steel in industrial applications.
Key Features
- Excellent machinability performance
- Superior cold strain plasticity
- Outstanding weldability characteristics
- High hardenability for enhanced performance
International Standards Equivalents
| Chinese (GB) | American (AISI) | German (DIN) | Japanese (JIS) |
|---|---|---|---|
| 20CrNiMo | SAE8620 | 1.6523 | / |
Chemical Composition
| Element | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
|---|---|---|---|---|---|---|---|---|---|
| 20CrNiMo | 0.17-0.23 | 0.17-0.37 | 0.6-0.95 | ≤0.035 | ≤0.035 | 0.4-0.7 | 0.20-0.30 | ≤0.30 | / |
Mechanical Properties
| Property | Value |
|---|---|
| Quenching Temperature | 850°C (oil cooled) |
| Tempering | 200°C (air cooled) |
| Tensile Strength (σb) | ≥980 MPa (100) |
| Yield Strength (σs) | ≥785 MPa (80) |
| Elongation (δ5) | ≥9% |
| Reduction of Area (ψ) | ≥40% |
| Impact Energy (Akv) | ≥47 J |
Typical Applications
Widely used in transmission systems, tractor motors, and small to medium automotive applications.
Serves as an alternative to 12CrNi3 for high-class carburization and cyanide carburizing parts
including oil drilling equipment, mining claws, and cones. Commonly specified for carburized gears,
pinions, shafts, bearings, piston rings, ring gears, crankshafts, and other critical components.
Available Stock Sizes
| Product Form | Diameter Range |
|---|---|
| Round Bar | 12-380mm |
Material Conditions & Forms
Available in various forms including round bars, flat bars, plates, and blocks. Material conditions
include pre-hardened, hot rolled, annealed, quenched and tempered, with surface finishes ranging
from black, pre-machined, ground, to polished surfaces.
Quality & Service Advantages
Quality Assurance
Materials are sourced exclusively from government-owned steel mills to ensure consistent quality
and reliability. Our ISO 9001 certified quality management system undergoes regular audits and
recertification to maintain the highest standards.
Delivery Performance
We prioritize timely delivery for all business transactions, ensuring both raw materials and
finished products with machining or heat treatment reach customers in the shortest possible lead times.
Value-Added Services
Comprehensive processing services including metal cutting, sizing, machining (blanking, milling,
grinding), heat treatment, and sawing for both small and large quantities. We accept orders of any
size and length with fast shipping capabilities.
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