2.Why there are a little different prices in the stainless steel grade under same?
The size, the standard , the surface treatment, stainless steel grade and heat treatment all same. The different price depend on Ni and Cr chemical content.You know the stainless steel materials costing is changing according to different alloy elements contents.
such as ASTM A312 TP304 seamlessstainless steel pipe:
Chemical analysis: Cr:18.00%-20.00% Ni:8.00-12.00. so if you need Ni ≥10% , the price must be higher thanNi:8%-9.9% which is even qualified on the ASTM A 312 standard.