MATERIAL INTRODUCTION
65Mn Steel Strip
High carbon manganese spring steel strip, magnetic, density: 7.85 g/cm³.
- Grade
- 65Mn
- Thickness
- 0.08–3.0 mm
- Width
- 2 mm
Chemical Composition (wt%)
| C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|
| 0.62～0.70 | 0.17～0.37 | 0.90～1.20 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 |
Applicable Standards
| Standard / Designation |
|---|
| GB/T 1222 |
| GB/T 3525 |
| AISI 1566 |
| DIN 1.0904 |
Tempers & Hardness
| Temper | Hardness / Characteristics |
|---|---|
| ANN (Annealed, Soft Temper) | HV ≤240, good ductility for bending and forming |
| 1/4H | 250–300 HV |
| 1/2H | 300–350 HV (widely used for spring shrapnels) |
| 3/4H | 350–400 HV |
| FH (Full Hard) | ≥400 HV |
(as-supplied)
Note: Hardenable by quenching & tempering, achievable HRC42～52 with excellent spring back performance. Poor corrosion resistance; surface treatment such as bluing, phosphating or plating is required.
Common Surface Finishes
| Surface | Description / Applications |
|---|---|
| 2B cold rolled bright finish | clean surface, ideal for precision stamping |
| Blued finish | popular anti-rust surface for springs |
| Pickled finish | low cost for general parts |
Size Range & Precision Slitting (Edge trimming and deburring)
0.08–3.0 mmThickness
2 mmWidth
±0.002 mmTight tolerance available
Can be slit and precision cut per drawings. Please confirm required dimensions and achievable tolerances with your inquiry.
Material Features
- High carbon manganese spring steel. Higher manganese content delivers better hardenability than S45C / S50C and superior spring back property
- No Cr/Ni, moderate cost. Easy to rust in humid conditions, anti-corrosion treatment mandatory
- Fair machinability; poor weldability. Elasticity will be lost and cracking risk high after welding, not recommended for welded assemblies
- Obvious work-hardening, suitable for spring clips and shrapnels with better fatigue performance than S50C
Applications
Spring shrapnels, clips, washers, clutch plates, clock springs, blade blanks, harvester blades, precision elastic gaskets, hardware elastic components
Material Comparison
| Grade | Key Characteristics |
|---|---|
| 65Mn | Carbon spring steel, good spring back & better hardenability than S50C |
| S50C | Medium-high carbon steel, mainly for wear-resistant structural parts, inferior elasticity |
| S45C | Medium carbon steel, better toughness for structural components |
| 301 stainless shrapnel | Corrosion resistant, elasticity from cold work, higher cost |