Specification of Structural Alloy Steel Strip for Saw Blade
1. The comparison table for each standard
| Steel Grade | GB T 3077-1988 | JIS G4103-4105 | ASTM A29 | ISO |
| 20 Cr | GB 20 CR | SCr240 | 5120 | A20202 |
| 30 Cr | GB 30 CR | SCr430 | 5130 | A20302 |
| 35 Cr | GB 35 CR | SCr435 | 5135 | A20352 |
| 40 Cr | GB 40 CR | SCr440 | 5140 | A20402 |
| 50 CrV | GB 50 CRV | SUF10 | 6150 | - |
| 20 CrMo | GB 20CRMO | SCM420 | 4118 | A30202 |
| 30 CrMo | GB 30CRMO | SCM430 | 4130 | A30302 |
| 35 CrMo | GB 35CRMO | SCM435 | 4135 | A30352 |
| 42 CrMo | GB 42CRMO | SCM440 | 4140 | A30422 |
2. Main Chemical Composition
| Unified digital code | Steel Grade | C | Si | Mn | Cr | Mo | V |
| A20202 | 20 Cr | 0.18-0.24 | 0.17-0.37 | 0.50-0.80 | 0.70-1.00 | - | - |
| A20302 | 30 Cr | 0.27-0.34 | 0.17-0.37 | 0.50-0.80 | 0.80-1.00 | - | - |
| A20352 | 35 Cr | 0.32-0.39 | 0.17-0.37 | 0.50-0.80 | 0.80-1.00 | - | - |
| A20402 | 40 Cr | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.80-1.00 | - | - |
| A20502 | 50 CrV | 0.46-0.54 | 1.70-0.37 | 0.50-0.80 | 0.80-1.10 | - | 0.10-0.20 |
| A30202 | 20 CrMo | 0.17-0.24 | 0.17-0.37 | 0.40-0.70 | 0.80-1.10 | 0.15-0.25 | - |
| A30302 | 30 CrMo | 0.26-0.34 | 0.17-0.37 | 0.40-0.70 | 0.80-1.10 | 0.15-0.25 | - |
| A30352 | 35 CrMo | 0.32-0.40 | 0.17-0.37 | 0.40-0.70 | 0.80-1.10 | 0.15-0.25 | - |
| A30422 | 42 CrMo | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | 0.90-1.20 | 0.15-0.25 | - |
3. Mechanical Property
| Steel grade | Tensile strength (σb/MPa) | Yield point (σb/MPa) | Elongation (δ5/%) | Reduction of Area (ψ/%) | Impact absorbing Energy (Aku2/J) | Brinell Hardness (HBS100/3000) |
| Annealing or High Tempering | ||||||
| 20 Cr | 835 | 540 | 10 | 40 | 47 | 179 |
| 30 Cr | 885 | 685 | 11 | 45 | 47 | 187 |
| 35 Cr | 930 | 735 | 11 | 45 | 47 | 207 |
| 40 Cr | 980 | 785 | 9 | 45 | 47 | 207 |
| 50 CrV | 1274 | 1127 | 10 | 40 | - | - |
| 20 CrMo | 885 | 685 | 12 | 50 | 78 | 197 |
| 30 CrMo | 930 | 785 | 12 | 50 | 63 | 229 |
| 35 CrMo | 980 | 835 | 12 | 45 | 63 | 229 |
| 42 CrMo | 1080 | 930 | 12 | 45 | 63 | 217 |
4. Available Size:
1) Thickness: 0.08mm to 2.5mm, Thickness tolerance: +/- 0.02mm
2) Width: 6mm to 600mm, Width tolerance: +/-0.1mm
3) Length: in coil or customized length
We can also provide with other material grade and size according client’s needs
Manufacturing of Structural Alloy Steel Strip for Saw Blade:
- Cold rolling, slitting and edge processing
- Heat treatment: annealing, tempering, hardening
- Cold finishing and polishing
Application of Structural Alloy Steel Strip for Saw Blade:
- Auto Spare Parts: seat belt, clutch, windshield wiper blade, etc
- Gate lock and keys
- Cutting material: saw blade, band saw, chain saw, mill saw, etc.
- Auto Spare Parts: seat belt, clutch, windshield wiper blade, etc
- Gate lock and keys
- Cutting material: saw blade, band saw, chain saw, mill saw, etc.