JIS G3444 STK400 Structural Steel Tube
What is the ASTM equivalent of STK400 hot-dip galvanized structural steel pipe?
The original steel grade STK41 steel pipe is exactly the same as STK400 steel pipe. Equivalent grades: ASTM A53 steel pipe, ASTM A106 GrB steel pipe, API 5L GRB steel pipe.
stk400 carbon structural steel pipe is a Japanese carbon structural steel pipe brand. There is no corresponding brand for stk400 galvanized steel pipe in China. You can choose the national standard GB/T8162 structural seamless steel pipe according to the usage requirements. This type of structural steel pipe is generally smelted in a converter or an open-hearth furnace. Its main raw materials are molten iron and scrap steel. The sulfur and phosphorus content in the steel is higher than that of high-quality carbon structural steel pipes.
JIS G3444 structural steel tube chemical composition:
|
Steel Grade |
Chemical Composition % |
||||
| C | Si | Mn | P | S | |
| STK 400 | 0.25 max. | - | - | 0.040 max. | 0.040 max. |
| STK 490 | 0.18 max. | 0.55 max. | 1.50 max. | 0.040 max. | 0.040 max. |
JIS G3444 Carbon Steel Tube mechanical property:
| Steel Grade | Tensile strength | Yield Strength | Elongation % |
| N/kgf | N/kgf | (No.5 test piece) | |
| STK 400 | 400 {41} min. | 245 {25} min. | 23 min. |
| STK 490 | 490 {50} min. | 325 {33} min. | 23 min. |
STK400 Mild Carbon Hollow Section

Grade: STK400
Outer diameter: 21.7-609.6mm
Wall thickness: 2-22mm
Length: 0.8-18m
Manufacturing method: hot rolling
Surface treatment: coating, painting, galvanizing, etc.
gnee company specializes in the production of seamless steel pipes, seamless steel square pipes, seamless steel oval pipes, welded steel pipes, large diameter steel pipes and carbon steel plates and sheets, as well as galvanized products of all carbon steel materials, galvanized steel pipes, etc. The company produces annually The capacity is 15,000 tons of galvanized steel seamless pipes.
Gnee Factory environment

FAQ
1.Q.Why choose Gnee?
A.With us, you will get the most competitive price, guaranteed quality, guaranteed delivery and after-sales service.
2.Q.Can your products be customized?
A.We can make most arades and specifications.meet your different requirement.
3.Q. Do you have a quality control system?
A.Yes, we have our own quality control laboratory.
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