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Raian IonescuMaterial quality very good. we have cooperate more than 10 Years. They trade lots kinds of steel material. All material quality good. They duty for all material quality. We are planing continue cooperate with them in the future
65Mn Alloy Spring Steel Strip with HRC 40 Hardness for Boiler Plate Applications
Product Details
| Model NO. | 65mn | Edge Type | Slit Edge |
|---|---|---|---|
| Thickness Range | 0.01-3mm | Carbon Content | 0.62-0.70% |
| Silicon Content | 0.17-0.37% | Manganese Content | 0.90-1.20% |
| Phosphorus Content | ≤0.035% | Sulfur Content | ≤0.035% |
| Chromium Content | 0.25% Max | Nickel Content | 0.25% Max |
| Tensile Strength | ≥980 MPa | Yield Strength | ≥785 MPa |
| Elongation | ≥8% | Reduction Area | ≥30% |
| Hardness (Hot Rolled) | ≤302 HB | ||
| Highlight | 65Mn Alloy Spring Steel Strip,HRC 40 Hardness Steel Strip,Boiler Plate Application Steel Strip |
||
Product Description
65MN Spring Steel Strip - Cold Rolled Heat Treated Steel
65MN spring steel strips are cold rolled and heat treated to achieve HRC 40 hardness, offering excellent mechanical properties for demanding industrial applications.
Chemical Composition
| Element | Content (%) | Element | Content (%) |
|---|---|---|---|
| C | 0.62-0.70 | Si | 0.17-0.37 |
| Mn | 0.90-1.20 | P | ≤0.035 |
| S | ≤0.035 | Cr | 0.25max |
| Ni | 0.25max |
International Equivalents
| Country | Standard | Grade |
|---|---|---|
| USA | AISI/SAE/ASTM/UNS | 1066 |
| China | GB | 65Mn |
| England | BS | 080A67 |
Heat Treatment Processes
Annealing Process
Slowly heat to 730°C with sufficient soaking time to ensure thorough heating, then cool slowly in the furnace. Resulting hardness: MAX 250 HB.
Hardening Process
Heat uniformly to 830-860°C (1526-1580°F) until completely heated through. Allow approximately 30 minutes per 25mm of ruling section, then immediately quench in oil.
Tempering Process
Temper at 540°C with thorough soaking for at least one hour per 25mm of total thickness. Hardness values vary based on tempering temperatures.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (σb) | ≥980 MPa |
| Yield Strength (σ0.2) | ≥785 MPa |
| Elongation (δ5) | ≥8% |
| Reduction of Area (ψ) | ≥30% |
| Hardness (Hot Rolled) | ≤302 HB |
Applications
65Mn steel offers high strength with adequate toughness and plasticity after heat treatment and cold drawing hardening. While hardenability is limited, it excels in smaller spring applications including speed regulating springs, load springs, round and square spiral springs for general machinery, and pull wires for small mechanical springs.
Standard Sizes & Tolerances
- Steel Round Bar: Diameter Ø 2mm - 3000mm
- Steel Plate: Thickness 2mm - 3000mm × Width 100mm - 3500mm
- Steel Hexagonal Bar: Hex 5mm - 105mm
- Custom sizes available - contact our experienced sales team
Processing Capabilities
GB 65Mn Spring Steel round bars and flat sections can be cut to your required specifications. We also supply precision ground Spring Steel bars to your exact tolerances, along with Ground Flat Stock and Gauge Plate in both standard and custom sizes.
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