... , A269, A312, A688 Stainless Mechanical Tubing Instructions: Stainless Mechanical Tubing :The stainless mechanical tubing is made from stainless steel ... subsequent processing and hot-reducing. We can supply stainless mechanical tubing with following details:1, Specification: OD: 6-219mm, ... with Bao Steel and Shanghai Minmetals.4, More than usd$50,000,000 annual turnover. · Stainless Mechanical ...