Guarantee chemical composition of cold heading quality steel wires.

O&K Osaka Test Center obtained ISO/IEC 17025's approval for their accredited test center. This qualification allows us to analyze chemical composition of rods officially, and enables us to select optimal raw material that has chemical composition within narrow limits to meet our customers' requirement.

Chemical composition of wire rods is ,generally, guaranteed by steel mill on its correspondence with JIS standard, foreign standards, such as AISI, SAE. However, many fastener producers' recent requirements indicate that they should use steel wire that has chemical composition within narrow limits to avoid the quality variation at heat treatment process on their parts production. This would be beyond steel mill's ability to control.

O&K can select wire rods having the best chemical composition and grade from narrow limited range, and verifying this in our own certified laboratory.