Product:
Tube of Centrifugal Steel Casting;
ERW Steel Pipe;
Seamless Steel;
Heat Expended Steel Pipe;
Hot Rolled Steel Pipe;
Spiral Steel Pipe;
and Galvanized Steel Pipe.
Standards:
API; ASTM; ASME; JIS; DIN; BS; EN; UNI; and GB;
Material:
GX 25CrNiSi 20-14 DIN 1.4832;
GX 40NiCrSi 38-18 DIN 1.4865;
GX-40CrNiSi25/20  DIN 1.4848;
G-X40CrNiSi25-12  DIN 1.4837; 
DIN 1.4408;
DIN1.4404;
10#, 20#, 35#, 45#;
20CrMo,
DZ40/50;
40Mn2;
X42/46/52;
And etc