Cold Rolled Alloy Tool Steel Strip

As one of the few suppliers in China for cold rolled special 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.

Cold Rolled Alloy Tool Steel Strip

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• Chemical Composition (%)

C	Si	Mn	P	S	Cu	Ni	Cr	W	V
0.75-0.85	0.35	0.50	0.030	0.030	0.25	0.70-1.30	0.20-0.50	---	---
0.75-0.85	0.35	0.50	0.030	0.030	0.25	1.30-2.00	0.20-0.50	---	---
0.77-0.83	0.35	0.30-0.50	0.030	0.030	0.25	2.00-2.50	0.25	---	---
0.85-0.95	0.35	0.60	0.030	0.030	0.25	0.30-0.70	0.15-0.35	---	---
0.85-0.95	0.35	0.50	0.030	0.030	0.25	0.70-1.30	0.50	---	---
0.75-0.85	0.15-0.35	0.50	0.030	0.030	0.25	1.30-2.00	0.20-0.50	---	0.20-0.30
0.90-1.00	0.15-0.35	0.30-0.50	0.030	0.030	0.25	---	0.20-0.40	---	---
1.10-1.30	0.35	0.50	0.030	0.030	0.25	0.25	0.20-0.50	---	---
0.80-0.90	0.35	0.80-1.00	0.030	0.030	0.25	---	0.40-0.60	---	---
0.80-0.85	0.35	0.50	0.030	0.030	0.25	0.25	0.40-0.60	---	0.25-0.35
0.58-0.63	0.15-0.35	0.60-0.90	0.030	0.030	0.25	0.25	0.35-0.60	---	0.15-0.25

• 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

• Hardness (HV)

Standard	Type of Steel	Annealing Hardness		Deep-Drawing Hardness
		Standard	Special
JIS	SKS5M	190	180	200-280
	SKS51M	190	180	200-280

• Heat Treatment

Type of Steel	Oil Hardening
	Temperature (°C)	Hardness (HRC)
SKS5M	800-850	61
SKS51M	800-850	61

• Finish

Aside from ordinary annealing and hard-drawn finishes, Volda also implements PPC, PT, and other
finishes aimed at speeding up hardening and conserving heat. Cold-rolled special steel strip is available in the following finishes.

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

• Applications

Cutters
Hand Saws
Saw Blades
Tools

We have processing and forming simulation and analysis technology for cold rolled special steel strips and can carry out heat treatment, welding, stamping, roller pressure, rotary pressure, thermoforming and hydroforming and other process simulation and simulation analysis.

We also can provide users with high strength steel forming technical support and mold improvement support as well as 50kg-500kg sample testing with advanced technologies from steelmaking - hot rolling - pickling - cold rolling - annealing and other processes.