347H Stainless Steel Seamless Pipe/ Tubo sin soldadura de acero inoxidable 347H austenitic stainless hot strength steel has good corrosion resistance, weldability and hot strength. Application: 347H stainless steel is used for large boiler superheater, reheater, steam pipe, petrochemical heat exchanger fittings. Main Standard: ASTM A213, ASTM A312, ASTM A269 Main Grade: 347H; 1.4912 Outer Diameter: 21-508mm Wall Thickness: 2-55mm Length: Random Surface Treatment: pickling or as customers’ requirement How is it Measured? Outer Diameter (A) X Schedule or Wall Thickness (B) X Length PS: H in 347H means HIGH.