Spec: 12X1 -406X30 SUS304   stainless steel chemical composition ≤0.08 ≤1.00 ≤2.00 ≤0.05 ≤0.03 18.00-20.00 8.25~10.50
 
One kind of high alloy that is corrosion resistant in air or chemically aggressive media. With nice appearances and corrosion resistance, without color plating, all specialties can be brought in to play. 13 chrome steel, 18-8chrome nickel steel and other high-alloy steel are the representative ones.
 
Allowed deviation
 
Deviation level                      Allowed diameter tolerance

D1                                         ±1.5% minimum ±0.75 mm
D2                                         ±1.0% minimum±0.50 mm
D3                                         ±0.75% minimum±0.30 mm
D4                                         ±0.50% minimum±0.10 mm