For Nut And Bolt Cold Extrusion Steel Wire

Materials

Spec.

Hardness

(HRD)

Ovality

(mm)

Reduction of area

Tensile strength

N/mm2

Decarbonizing

In part

Decarbinizing

In complete

Balling Grade

Elogat-ion

Fault

on Surface

SWCH10A/SWRCH15A

SWRCH18A/

SWRCH22A/SWRCH8A

D≤6

Allow+0/-0.03

6<D≤16

allow+0/-0.04

≤80

Meet factory standard

≥65%

310-500

D<10 Total decarburization≤0.01d 10≤D<15  Total decarburization≤0.10

D<10  Complete decarburization ≤0.015   10≤D<15 Surface decarburization≤0.02

≥4

By technology agreement

Not Allow

SCM435/42CrMo/

SCM440/20CrMnTi/

20Cr/20CrMo

D≤6

Allow+0/-0.03          6<D≤16

Allow+0/-0.04

≤92

Meet factory standard

≥65%

480-600

D<10 Total decarburization≤0.01d 10≤D<15  Total decarburization≤0.10

D<10  Complete decarburization ≤0.015   10≤D<15 Surface decarburization≤0.02

≥4

By technology agreement

Not Allow

SCR440/40Cr

D≤6

Allow+0/-0.03          6<D≤16

Allow+0/-0.04

≤92

Meet factory standard

≥65%

480-600

D<10 Total decarburization≤0.01d 10≤D<15  Total decarburization≤0.10

D<10  Complete decarburization ≤0.015   10≤D<15 Surface decarburization≤0.02

≥4

By technology agreement

Not Allow

SWCH35K/SWRCH45K

D≤6

Allow+0/-0.03          6<D≤16

Allow+0/-0.04

≤87

Meet factory standard

≥60%

450-550

D<10 Total decarburization≤0.01d 10≤D<15  Total decarburization≤0.10

D<10  Complete decarburization ≤0.015   10≤D<15 Surface decarburization≤0.02

≥4

By technology agreement

Not Allow

Wire Diameter

Product Ring Diameter

Weight

D6.5mm  max

<800mm

150—200kg

D6.5mm—14mm

<1200mm

1000kg

D14 mm  min.

1200---1900mm

2000kg