company sales of products species has extended to party pipe, and h steel, and round, and stainless steel tube,, and widely of application in mechanical, and petrochemical, and power, and space, and port, and ship, and bridge ·, car, and sports, and decorative, and spinning machine, all field, and and domestic each big Mills, baogang, and angang, and days steel, and gang, has long-term stable of business cooperation relationship.

 OUR ADVANTAGES:

1.Our factory established in 1993, we have 20 years experience in this area.
2.We engaged in research square and rectangular steel tube at the beginning of company established, now our technology is far ahead.
3.We have a leading international, domestic origination of production units.
4.We have passed the standards of ASTM A500, JIS G 3466, DIN EN10210, GB/T178-2005, GB/T 3094-2000 and GB/T6728-2002.
5.Our products in different sizes, and different thickness , can satisfy your desire a station buy need.
6.Perfect after-sale service to solve your worries.

Chemical composition

Chemical component (molten steel analysis value) of STPY400 is, analytical testing is performed by the analytical method in accordance with JIS G 0320 (molten steel analysis methods of steel), will be the following values.

· C: 0.25% or less 
· P: 0.040% or less 
· S: 0.040% or less

Mechanical property

Steel band or steel sheet used for the pipe or pipe of STPY400 is, tensile strength, yield point or yield strength, and the test is performed with respect to growth, and these correspond to the following values.

Tensile strength (N / mm2): 400 or higher 

-yield point or yield strength (N / mm2): 225 or more 

-growth (No. 5 test piece transverse direction): 18% or more