FAQ

The main material is medium carbon steel and stainless steel.

Material number of Carbon Steel: SWRH57-72 (Chine Steel PN#)

Material number of Stainless Steel: SUS304、SUS316

The standard of JIS is HRC 42-50

The standard of IFI is HRC 38-46

The standard of DIN is HV 430-530

There have Zinc Plated、Yellow Zinc Plated、Black Oxide、Nickel Plated、Hot Dip Galvanised、Mechanical Zinc…etc.

We also can per customer's request.

In pressuring molding process, the molecular structure of the steel material will be changed. Slight magnetism is a normal physical phenomenon, and it doesn’t affect material properties.

When we received the material, we need to process the wire to forming the washer. So the washer have magnetic is normal.

We are strict control our quality. If customer have any questions, we can offer the raw material certification of product.

The main material is low carbon steel and stainless steel.

Material number of Carbon Steel: SAE1005~1015

Material number of Stainless Steel: SUS304、SUS316