Cold Rolled Carbon Steel Strip
As one of the leading suppliers in China for high precision cold rolled carbon steel strips, we focus on high dimensional accuracy and excellent surface quality. We utilize the latest automated steelmaking systems and advanced technologies to process cold rolling and annealing to meet the requirements of the refined industry quality steel products.
• Applications
Automotive Automatic Transmission Parts
Automotive Clutch Parts
Automotive Seat Belt Parts
Springs and Washers
Sprocket Gears
Saw Chains
• Chemical Composition (%)
JIS | SAE | C | Si | Mn | P | S |
S15C | 0.13-0.18 | 0.15-0.35 | 0.30-0.60 | 0.030 | 0.035 | |
S15CK | 0.13-0.18 | 0.15-0.35 | 0.30-0.60 | 0.025 | 0.025 | |
S25C | 0.22-0.28 | 0.15-0.35 | 0.30-0.60 | 0.030 | 0.035 | |
S30CM | 0.27-0.33 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.035 | |
S35CM | 0.32-0.38 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.035 | |
S45CM | 0.42-0.48 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.035 | |
S48C | 0.45-0.51 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.035 | |
S50CM | 0.47-0.53 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.035 | |
SAE1050 | 0.48-0.55 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.050 | |
S53C | 0.50-0.56 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.035 | |
S55CM | 0.52-0.58 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.035 | |
SAE1055 | 0.50-0.60 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.050 | |
S58C | 0.55-0.61 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.035 | |
S60CM | 0.55-0.65 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.035 | |
SAE1060 | 0.55-0.65 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.050 | |
SAE1065 | 0.60-0.70 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.050 | |
S65CM | 0.60-0.70 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.035 | |
SAE1070 | 0.65-0.75 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.050 | |
S70CM | 0.65-0.75 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.035 | |
SAE1075 | 0.70-0.80 | 0.15-0.30 | 0.40-0.70 | 0.030 | 0.050 | |
S75CM | 0.70-0.80 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.035 | |
SAE1080 | 0.75-0.88 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.050 | |
SAE1085 | 0.80-0.98 | 0.15-0.30 | 0.70-1.00 | 0.030 | 0.050 | |
SAE1090 | 0.85-0.98 | 0.15-0.30 | 0.60-0.90 | 0.030 | 0.050 |
• Thickness Tolerance (mm)
Several different grades of thickness allowance― A(standard) and S, SS, and SSS(special)― are available. The thickness is
measured arbitrarily at more than 10 mm from the edge of the steel. When the width is 20 mm or less, the steel is measured in the center portion.
Grade | A | S | SS | SSS |
ความกว้าง | Less than 450 | Less than 450 | Less than 400 | Less than 200 |
ความหนา | ||||
0.10-0.15 | ±0.010 | ±0.008 | ±0.007 | ±0.006 |
0.15-0.25 | ±0.015 | ±0.010 | ±0.008 | ±0.007 |
0.25-0.40 | ±0.020 | ±0.015 | ±0.010 | ±0.008 |
0.40-0.60 | ±0.025 | ±0.020 | ±0.015 | ±0.010 |
0.60-0.90 | ±0.030 | ±0.025 | ±0.020 | ±0.015 |
0.90-1.20 | ±0.040 | ±0.030 | ±0.025 | ±0.020 |
1.20-1.60 | ±0.050 | ±0.040 | ±0.030 | ±0.025 |
1.60-2.10 | ±0.055 | ±0.050 | ±0.040 | ±0.030 |
2.10-2.60 | ±0.060 | ±0.055 | ±0.050 | ±0.040 |
2.60-3.25 | ±0.065 | ±0.060 | ±0.050 | ±0.045 |
3.25-4.00 | ±0.080 | ±0.070 | ±0.060 | ±0.050 |
4.00-5.00 | ±0.090 | ±0.080 | ±0.070 | --- |
• Width Tolerance (mm)
Grade | A | S | ||
ความกว้าง | Less than 200 | Less than 450 | Less than 200 | Less than 450 |
ความหนา | ||||
<0.60 | ±0.15 | ±0.25 | ±0.10 | ±0.20 |
0.60-1.20 | ±0.20 | ±0.30 | ±0.15 | ±0.25 |
1.20-3.25 | ±0.25 | ±0.40 | ±0.20 | ±0.35 |
3.25-4.00 | ±0.25 | ±0.40 | ±0.20 | ±0.35 |
4.00-5.00 | ±0.40 | ±0.55 | ±0.35 | ±0.50 |
• Lateral Bending Tolearance (mm)
Grade | A | S | SS |
ความกว้าง | |||
10-20 | 20 | 15 | 12 |
20-40 | 15 | 10 | 8 |
40-80 | 8 | 6 | 4 |
80-450 | 4 | 3 | - |
• Flatness Tolerance (mm)
Tolerance | ความหนา | |||||
≤0.60 | 0.60-1.20 | 1.20-3.20 | 3.20-5.00 | |||
≤200 | Annealed | Widthwise | 1.0 | 1.0 | 1.5 | 2.0 |
Lengthwise | 2.0 | 3.0 | 3.0 | 5.0 | ||
Hard-drawn | Widthwise | 1.0 | 1.5 | 1.5 | 2.5 | |
Lengthwise | 3.0 | 4.0 | 4.0 | 6.0 | ||
200-450 | Annealed | Widthwise | 1.5 | 2.0 | 2.5 | 3.0 |
Lengthwise | 4.0 | 5.0 | 5.0 | 7.0 | ||
Hard-drawn | Widthwise | 1.5 | 2.0 | 3.0 | 4.0 | |
Lengthwise | 6.0 | 7.0 | 7.0 | 9.0 |
• Finish and Hardness
Aside from ordinary annealing and hard-drawn finishes, Volda also implements PPC, PT, and other
finishes aimed at speeding up hardening and conserving heat.
Stage | Symbol | Condition |
Annealing | A | Annealing is implemented after cold rolling |
Skinpass | S | Annealing and thermal refining are implemented after cold rolling |
Deep drawing | C | Cold rolling is implemented |
Patenting | PT | Patenting treatment and fixed cold rolling are implemented |
PPC | PC | Spheroidal carbide is refined |