65Mn Spring Steel Strip Product Overview
65Mn spring steel strip is a high-carbon manganese steel valued for its excellent elasticity, hardenability, and fatigue resistance. With approximately 0.65% carbon and 1.0% manganese, 65Mn is widely used for springs, clips, blades, saw blades, washers, and automotive components. Huaxia-Steel supplies 65Mn strip in annealed, hardened-and-tempered, and bright-cold-rolled conditions, slit to width and coiled for efficient processing.
Standard Sizes and Specifications
| Parameter | Range |
|---|---|
| Thickness | 0.10 mm – 6.0 mm |
| Width | 5 mm – 600 mm (slit to width) |
| Coil inner diameter | 300 mm / 400 mm / 508 mm, or per request |
| Coil outer diameter | Up to 1,500 mm |
| Edge condition | Slit edge, deburred edge, round edge |
| Surface | Bright, polished, blue-polished, oiled |
Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.62 – 0.70 |
| Silicon (Si) | 0.17 – 0.37 |
| Manganese (Mn) | 0.90 – 1.20 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | ≤ 0.25 |
| Nickel (Ni) | ≤ 0.25 |
Mechanical Properties by Condition
| Condition | Hardness (HV) | Tensile Strength (MPa) | Application |
|---|---|---|---|
| Annealed | ≤ 230 | 600–750 | Forming, stamping, blanking |
| Cold rolled | 240–300 | 750–950 | Flat springs, clips, clamps |
| Hardened & tempered | 380–520 | 1,200–1,800 | High-performance springs, blades |
Manufacturing Standards
Our 65Mn spring steel strip is produced according to:
- GB/T 1222: spring steels (Chinese standard)
- JIS G4801: SUP6 / SUP7 spring steel equivalents
- ASTM A29 / A29M: general requirements for carbon and alloy steel bars
- EN 10132-4: cold-rolled narrow steel strip for heat treatment
Applications
- Flat springs, leaf springs, and clock springs
- Clips, clamps, retainers, and washers
- Saw blades, knives, and cutting tools
- Automotive seat components and door seals
- Agricultural machinery springs
- Hardware, hand tools, and electrical contacts
Quality Assurance
Each coil is supplied with a mill test certificate showing heat number, chemistry, mechanical properties, and hardness. Additional testing and processing available:
- Precision slitting to custom width
- Temper rolling and leveling
- Edge deburring and round edging
- Hardness testing across coil width
- PMI spectrometry
- Third-party inspection by SGS, BV, or TUV
Packaging and Shipping
65Mn strip is coiled with eye-to-sky or eye-to-wall orientation, secured with steel straps, and wrapped in moisture-proof paper and plastic film. Wooden pallets or crates protect coils during ocean transport. Oiling or VCI paper is applied to prevent rust on uncoated strip.
Request a Quotation
Send us your thickness, width, coil weight, hardness, surface finish, quantity, and destination. Huaxia-Steel will provide a factory-direct quotation for 65Mn spring steel strip within 24 hours. Contact us today.
