COLD FORMING MATERIALS

SWCH8A Cold heading steel wire

MATERIALSENGINEERINGCREATION GROUP

Products / JIS Standard / JIS G3507

SWCH8A Cold heading steel wire

Diameter of wire: 0.40-46mm

Tensile Strength: Please refer to the technical information page

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Shanghai Creation GroupIs China. It is a benchmark company that has 20 years of experience in an enterprise that focuses on cold heading quality steel wires in the entire management team. We have a good relationship with many tier one suppliers in the automotive industry and all the wire wire is supplied by brand steel mills. All orders are 100% traceable.

Technical delivery conditions

D Process:

DA process:

Surface Quality

- : Continuous, smooth

- : No stitches, no overlap, potholes, scratches, no extension marks

- : No rust

Applied Industry

- : Automotive Industry

- : Construction

- : Machinery & Equipment Industry

- : Other Industries

Case Study

Products & Service

Wire rod

Pickling and phosphating

Cold drawing

Spheroidizing annealing

Inspection

Finished products

1. Chemical composition

Table 1-Chemical ingredients, units %

Steel grade	C	Si	Mn	P	S	Al	Classification
SWRCH 6R SWRCH 8R SWRCH10R SWRCH12R SWRCH15R SWRCH17R	≤0.08 ≤0.10 0.08 ~ 0.13 0.10 ~ 0.15 0.13 ~ 0.18 0.15 ~ 0.20	– – – – – –	≤0.60 ≤0.60 0.30 ~ 0.60 0.30 ~ 0.60 0.30 ~ 0.60 0.30 ~ 0.60	≤0.040 ≤0.040 ≤0.040 ≤0.040 ≤0.040 ≤0.040	≤0.040 ≤0.040 ≤0.040 ≤0.040 ≤0.040 ≤0.040	– – – – – –	Rimmed-equivalent steel
SWRCH 6A SWRCH 8A SWRCH10A SWRCH12A SWRCH15A SWRCH16A SWRCH18A SWRCH19A SWRCH20A SWRCH22A SWRCH25A	≤0.08 ≤0.10 0.08 ~ 0.13 0.10 ~ 0.15 0.13 ~ 0.18 0.13 ~ 0.18 0.15 ~ 0.20 0.15 ~ 0.20 0.18 ~ 0.23 0.18 ~ 0.23 0.22 ~ 0.28	≤0.10 ≤0.10 ≤0.10 ≤0.10 ≤0.10 ≤0.10 ≤0.10 ≤0.10 ≤0.10 ≤0.10 ≤0.10	≤0.60 ≤0.60 0.30 ~ 0.60 0.30 ~ 0.60 0.30 ~ 0.60 0.60 ~ 0.90 0.60 ~ 0.90 0.70 ~ 1.00 0.30 ~ 0.60 0.70 ~ 1.00 0.30 ~ 0.60	≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030	≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035	≥0.02 ≥0.02 ≥0.02 ≥0.02 ≥0.02 ≥0.02 ≥0.02 ≥0.02 ≥0.02 ≥0.02 ≥0.02	Aluminum-killed steel
SWRCH10K SWRCH12K SWRCH15K SWRCH16K SWRCH17K SWRCH18K SWRCH20K SWRCH22K SWRCH24K SWRCH25K SWRCH27K SWRCH30K SWRCH33K SWRCH35K SWRCH38K SWRCH40K SWRCH41K SWRCH43K SWRCH45K SWRCH48K SWRCH50K	0.08 ~ 0.13 0.10 ~ 0.15 0.13 ~ 0.18 0.13 ~ 0.18 0.15 ~ 0.20 0.15 ~ 0.20 0.18 ~ 0.23 0.18 ~ 0.23 0.19 ~ 0.25 0.22 ~ 0.28 0.22 ~ 0.29 0.27 ~ 0.33 0.30 ~ 0.36 0.32 ~ 0.38 0.35 ~ 0.41 0.37 ~ 0.43 0.36 ~ 0.44 0.40 ~ 0.46 0.42 ~ 0.48 0.45 ~ 0.51 0.47 ~ 0.53	0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35 0.10 ~ 0.35	0.30 ~ 0.60 0.30 ~ 0.60 0.30 ~ 0.60 0.60 ~ 0.90 0.30 ~ 0.60 0.60 ~ 0.90 0.30 ~ 0.60 0.70 ~ 1.00 1.35 ~ 1.65 0.30 ~ 0.60 1.20 ~ 1.50 0.60 ~ 0.90 0.60 ~ 0.90 0.60 ~ 0.90 0.60 ~ 0.90 0.60 ~ 0.90 1.35 ~ 1.65 0.60 ~ 0.90 0.60 ~ 0.90 0.60 ~ 0.90 0.60 ~ 0.90	≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030 ≤0.030	≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035 ≤0.035	– – – – – – – – – – – – – – – – – – – – –	Killed steel

All steel types in this table should not exceed 0.30% Cu, 0.20% Ni and 0.20% Cr.

2. Mechanical properties of the wire

Table 2 Mechanical Properties of Lines by D Process

Steel grade	Wire diameter group mm	Tensile strength N/mm²	Reduction of area %	Hardness (Reference) HRB
SWCH6R SWCH8R SWCH10R SWCH6A SWCH8A SWCH10A	≤3	≥540	-	-
	>3~4	≥440	≥45
	>4~5	≥390
	>5	≥340		≤85
SWCH12R SWCH15R SWCH12A SWCH15A SWCH10K SWCH12K	≤3	≥590	-	-
	>3~4	≥490	≥45
	>4~5	≥410
	>5	≥360		≤90
SWCH17R SWCH16A SWCH18A SWCH20A SWCH15K	≤3	≥690	-	-
	>3~4	≥590	≥45
	>4~5	≥490
	>5	≥410		≤92
SWCH19A SWCH16K SWCH17K SWCH18K SWCH20K	>3~4	≥640		-
	>4~5	≥540		-
	>5~30	≥440		≤95
SWCH22A SWCH22A SWCH25A SWCH25A	>3~4	≥690		-
	>4~5	≥570		-
	>5	≥470		≤98

Remarks In the case of 1 wire diameter of 20 mm or more, the diaphragm is a value reduced by 5 from the value of Table 2. In addition, for 3 mm or less, the diaphragm is not specified. 2 N/mm2 = 1MPa

Table 3 Mechanical Properties of Lines by DA Process

Steel grade	Tensile strength N/mm²	Reduction of area %	Hardness (Reference) HRB
SWCH6R SWCH8R SWCH10R SWCH6A SWCH8A SWCH10A	≥290	≥55	≤80
SWCH12R SWCH15R SWCH12A SWCH15A SWCH10K SWCH12K	≥340		≤83
SWCH17R SWCH16A SWCH18A SWCH20A SWCH15K	≥370		≤85
SWCH19A SWCH16K SWCH17K SWCH18K SWCH20K	≥410		≤86
SWCH22A SWCH22K SWCH25A SWCH25K	≥440		≤88
SWCH24K SWCH27K	≥470		≤92
SWCH30K SWCH33K SWCH35K	≥620		≤92
SWCH38K SWCH40K SWCH43K	≥670		≤94
SWCH41K SWCH45K SWCH48K SWCH50K	≥710		≤97

Remarks 1. The line used for the product to be heat treated, which is SWCH6R to SWCH27K type, can have the lower limit of the tensile strength lower than the value in Table 3 according to the agreement between the receiving parties. 2. When the diameter of the wire is 20 mm or more, the aperture is reduced by 5 from the value of Table 3. For 3 mm or less, the diaphragm is not defined. 3 1N/mm2 = 1MPa

3. Depth of coal-decalination

Table 4 Average decalination depth allowable limits

Unit mm
Wire diameter	Depth of ferrite decarburization	Total depth of decarburization
≤15	≤0.02	≤0.15
>15~25	≤0.03	≤0.20
>25~32	≤0.04	≤0.25

In the case of the line between the decarburying depth SWCH30K and SWCH50K and the designation of the orderer, the test of 10.3.1 is performed, and the allowable limit of the average decarburying depth is in accordance with Table 4. However, a line having a diameter of more than 32 mm is subject to an agreement between the receiving parties.

4. Allowance of wire diameter and differential deviation

Table 5 Allowance of Wire Diameter and Difference Difference

Wire diameter	Tolerance	Out-of-roundness
≤ 3	0-0.025	≤ 0.013
Over 3 up to and including 6	0-0.030	≤ 0.015
Over 6 up to and including 10	0-0.036	≤ 0.018
Over 10 up to and including 18	0-0.043	≤ 0.022
Over 18 up to and including 30	0-0.070	≤ 0.035
Over 30 up to and including 40	0-0.100	≤ 0.050
Over 40 up to and including 50	0-0.150	≤ 0.070

Note (4) The deviation difference refers to the difference between the maximum value and the minimum value of the diameter in the same cross section of the line.

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