Delivery Time:25~35days
Certification:ISO9001 14001 BV TUV PED DNV etc
JIS G3444 STK290 Weld Mild Steel Tubing , Round Furniture Steel Tubes 35mm Thick
Quick Detail:
Standards: JIS G3444
Grade: STK290, STK400, STK500, STK490, STK540 ; STK30, STK41,STK,50,STK 51,STK55
Outer Dimensions: 6mm ~ 350mm
Wall Thickness: 0.8mm ~ 35mm
Length: max 24000mm
Description:
Standards: JIS G3444
Grade: STK290, STK400, STK500, STK490, STK540
Size (mm):
Outer Dimensions: 6mm ~ 350mm
Wall Thickness: 0.8mm ~ 35 mm
Length: max 24000mm
Application: Tubes used for machinery, automobiles, bicycles, furniture, appliances and other machine parts.
Packing: Beveled/black painting/ plastic caps/ in bundles/ steel strips/ wooden protection
Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength, Yield Strength,Elongation, Flaring, Flattening, Bending, Hardness, Impact Test),Surface and Dimension Test,Nodestructive Test, Hydrostatic Test.
Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Mark: As requested.
Delivery Condition:Annealed, Normalized, Normalized and Tempered
Chemical composition,%:
|
Steel grade |
Chemical composition,% |
||||
|
C |
Si |
Mn |
P |
S |
|
|
STK290 |
- |
- |
- |
≤0.050 |
≤0.050 |
|
STK400 |
≤0.025 |
- |
- |
≤0.040 |
≤0.040 |
|
STK500 |
≤0.24 |
≤0.35 |
0.30-1.30 |
≤0.040 |
≤0.040 |
|
STK490 |
≤0.18 |
≤0.55 |
≤1.50 |
≤0.040 |
≤0.040 |
|
STK540 |
≤0.23 |
≤0.55 |
≤1.5 |
≤0.040 |
≤0.040 |
Mechanical Properties:
|
Mechanical properties |
Tensile strength, N/mm2 |
Yield strength, N/mm2 |
Elongation,% |
Bending property |
Weld tensile strength,N/mm2 |
||
|
Longitudinal |
Transverse |
Angel of bending |
ID |
||||
|
OD |
All |
All |
≥40mm |
≤50mm |
≥350mm |
||
|
STK290 |
≥290 |
- |
≥35 |
≥25 |
90o |
6D |
≥290 |
|
STK400 |
≥400 |
≥235 |
≥23 |
≥18 |
90o |
6D |
≥400 |
|
STK500 |
