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JIS SCM220 20CrNiMoA Quenched and Tempered Alloy Steel Round Bar with Polished Surface and High Hardenability
Product Details
| Model NO. | SCM220 20crnimoa | Surface Treatment | Polished |
|---|---|---|---|
| Alloy Type | Alloy | Diameter Range | 10-350mm |
| Production Capacity | 500tons | Quenching Temperature | 850°C |
| Tempering Temperature | 200°C | Tensile Strength | ≥980 MPa |
| Yield Strength | ≥785 MPa | Elongation | ≥9% |
| Reduction Area | ≥40% | Impact Energy | ≥47 J |
| Carbon Content | 0.17-0.23% | Chromium Content | 0.4-0.7% |
| Molybdenum Content | 0.20-0.30% | ||
| Highlight | Quenched and Tempered Steel Round Bar,Polished Surface Alloy Steel Bar,High Hardenability Steel Rod |
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Product Description
JIS SCM220 20CrNiMoA Alloy Steel Round Bar
Quenched and tempered steel bar with diameters ranging from 10-350mm, ideal for demanding industrial applications.
Product Overview
20CrNiMoA SAE8620H steel round rod is a hot rolled alloy bar designed for chemical and mechanical applications. This low carbon nickel chromium molybdenum alloy offers excellent carburized properties, formability, and weldability, making it one of the most widely used carburizing alloys in industry.
Key Features
- Excellent machinability performance
- Superior cold strain plasticity
- Good weldability characteristics
- High hardenability without post-tempering fragility
International Standards Equivalents
| Chinese | American | German | Japanese |
|---|---|---|---|
| GB 20CrNiMo | SAE 8620 | DIN 1.6523 | JIS SCM220 |
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.17-0.23 |
| Silicon (Si) | 0.17-0.37 |
| Manganese (Mn) | 0.6-0.95 |
| Phosphorus (P) | ≤0.035 |
| Sulfur (S) | ≤0.035 |
| Chromium (Cr) | 0.4-0.7 |
| Molybdenum (Mo) | 0.20-0.30 |
| Copper (Cu) | ≤0.30 |
Mechanical Properties
| Property | Value |
|---|---|
| Quenching Temperature | 850°C (oil cooled) |
| Tempering | 200°C (air cooled) |
| Tensile Strength (σb) | ≥980 MPa (100 kgf/mm²) |
| Yield Strength (σs) | ≥785 MPa (80 kgf/mm²) |
| 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 components. 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, and crankshafts.
Available Stock Sizes
Round bar diameters: 12-380mm. Available in various conditions including pre-hardened, hot rolled, annealed, quenched and tempered, with surface conditions ranging from black, pre-machined, grinding, to polished finishes.
Why Choose Our Steel Products
Quality Assurance
We source materials exclusively from government-owned steel mills to ensure consistent quality and reliability in every product we supply.
Reliable Delivery
We prioritize timely delivery for all business transactions, ensuring your materials arrive when you need them, whether raw or finished with machining or heat treatment.
Quality Commitment
Our ISO 9001 certified quality management system undergoes regular audits and recertification to maintain the highest standards and meet customer demands.
Comprehensive Services
- Quality special steel for all industrial applications
- Orders of any size or length with fast shipping
- Unique inventory of specialty steel products
- Value-added services including metal cutting, sizing, machining, and heat treatment
- Sawing services for small or large quantities
- Excellent customer service support
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