Specs:

35/76,45/90,45/100,50/105,55/110,55/120,

60/125,65/120,65/132,68/143,70/135,70/140,

75/150,80/143,80/156,92/188,

The above specification can be customized according to customer’s requirements.

The screws can be designed according to different products and formulas.

Base material: 38CrMoAIA(JIS SACM645)

Material composition analysis:

C: 0.35～0.42 Si: 0.20～0.45 Mn: 0.30～0.60

S:≤0.035 P:≤0.035 Cr:1.35～1.65

Al: 0.70～1.10 Ni:≤0.030 Cu:≤0.030 Mo:0.15～0.25

Treatment process:

Hardening and tempering treatment

Nitrogen treatment

Alloy spray welding

Technical parameters:

Tempering hardness: HB260-290

Nitration case thickness: 0.50mm-0.80mm

Nitriding hardness: 900-1000HV

Nitriding brittleness: ≤ 1

Surface roughness: Ra0.32

Screw straightness: 0.015mm

Alloy thickness: 2-3mm

Alloy hardness: HRC58-65