COLD FORMING MATERIALS

DT4C DT4 DT4E DT4A cold heading wire rod

MATERIALSENGINEERINGCREATION GROUP

Products / GB National Standard / GB/T 6983

DT4C DT4 DT4E DT4A cold heading wire rod

Wire diameter: 0.40-46mm

Tensile Strength: Please refer to the technical parameters page

Product Detail Technical Information Inspection Packaging

Shanghai Creation GroupCo., Ltd. is a benchmark enterprise of domestic cold heading wire rod, with an average of more than 15 years of industry experience in production management. Most of its cooperative customers are first-class suppliers of global automobile enterprises, and all raw materials come from well-known domestic steel mills. All production orders are 100 per cent traceable.

Technical delivery conditions

Surface quality

- : Continuous smooth wire surface

- : No seams, overlaps, pits, scratches and pull marks

- : No rust

Application Industry

- : Automotive industry

- : building materials industry

- : Machinery and equipment industry

- : Other Industries

Case Study

Products & Service

Wire rod

Pickling and phosphating

Cold drawing

Spheroidizing annealing

Check

Finished products

1. Chemical composition

Table 1-Reference values for chemical composition (smelting analysis) of electromagnetic pure iron

Steel grade	Chemical composition (mass fraction) /%
	C	Si	Mn	P	S	Al	Ti	Cr	Ni	Cu
DT4	<0.010	<0. 10	<0.25	<0.015	<0.010	0.20 〜0.80	<0.02	<0. 10	<0. 05	<0. 05
DT4A
DT4E
DT4C

2. Mechanical properties

Table 5-Mechanical properties and surface hardness

Mechanical properties		Surface hardness
Tensile strength	Elongation after fracture A/%	Vickers hardness HV5
≥265	≥25	≤195

2.1 According to the requirements of the buyer, the mechanical properties of the forged round bar, hot-rolled round bar and hot-rolled plate can be tested, and the results shall meet the requirements of Table 5
2.2 The electromagnetic pure iron cold-rolled sheet (strip) delivered in the state of softening and annealing shall be tested for surface Vickers hardness. Three points shall be measured for each sample, and the average value shall be taken as the measurement result of a single sample. The hardness value shall be 85HV5~140HV5.

3. Electromagnetic performance

Table 2 Electromagnetic Performance

Magnetic grade	Steel grade	Coercive force Hc/(A/m) ≤	Increase in coercive force after aging △Hc/(A/m) ≤	Maximum permeability µ_m	Magnetic flux density B/T
					B₂₀₀	B₃₀₀	B₅₀₀	B₁₀₀₀	B₂₅₀₀	B₅₀₀₀	B₁₀₀₀₀
普通级	DT4	96.0	9.6	0.0075	≥1.20	≥1. 30	≥1.40	≥1. 50	≥1.62	≥1. 71	≥1.80
高级	DT4A	72.0	7.2	0.0088
特级	DT4E	48.0	4.8	0.0113
超级	DT4C	32.0	4.0	0.0151
注：B_{200 ，}B_300，B500 ......B10000分别表示磁场强度为 200 A/m、300 A/m、500 A/m......10 000 A/m 时的磁感应强度。

Note: B200 ,B300,B500 ...... B10000 respectively indicate the magnetic induction intensity when the magnetic field strength is 200 A/m, 300 A/m, 500 A/m ...... 10 000 A/m.

4. Surface quality

Table 3 Provisions of corresponding standards for surface quality of electromagnetic pure iron products.

The surface quality of electromagnetic pure iron products shall meet the requirements of the corresponding standards in Table 3.

Product type	Standard	Product type	Standard
电磁纯铁连铸方坯和矩形坯	YB/T 2011	电磁纯铁锻制圆棒	GB/T 699
电磁纯铁连铸板坯	YB/T 2012	电磁纯铁热轧板（带）	GB/T 711
电磁纯铁初轧坯	YB/T 004	电磁纯铁冷拉圆棒	GB/T 3078
电磁纯铁热轧圆棒	GB/T 699	电磁纯铁冷轧薄板（带）	GB/T 13237
电磁纯铁热轧盘条	GB/T 701