Gold Member Since 2009
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Shanghai Vastar International Co., Ltd.

Structure Tube, Carbon Steel Tube manufacturer / supplier in China, offering JIS G3444 Carbon Steel Tubes for General Structure, Stainless Steel Welded Pipe 304L, Precision Stainless Steel Capillary Tube and so on.

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JIS G3444 Carbon Steel Tubes for General Structure

FOB Price: Get Latest Price
Min. Order: 5 Tons
Production Capacity: 2000 Tons/Year
Transport Package: by Bundle or as Per Client′s Requirements
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: JIS G3444
  • Technique: EFW
  • Surface Treatment: Varnishing
  • Section Shape: Round
  • Origin: China
  • Type: Welded
  • Material: Carbon Steel
  • Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
  • Trademark: VASTAR
Product Description

JIS G3444 Carbon Steel Tubes for general Structure
Standard: JIS G3444
Steel grade: STK290, STK400, STK490, STK500, STK540

Application: used for structure of civil engineering and architecture, such as steel towers, scaffoldings, footing piles, foundation piles, piles for landslide suppressions and so on.

 
Chemical Composition: %
GradeCSiMnPS
STK290------0.050 max0.050 max
STK4000.25 max----0.040 max0.040 max
STK4900.18 max0.55 max1.65 max0.035 max0.035 max
STK5000.24 max0.35 max0.30 to 1.300.040 max0.040 max
STK5400.23 max0.55 max1.50 max0.040 max0.040 max
 
Mechanical Property
GrradeTensile strength, N/mm2Yield point of proof stress   N/mm2Tensile strength in weld zone  N/mm2
STK290290 min--290 min
STK400400 min235 min400 min
STK490490 min315 min490 min
STK500500 min355 min500 min
STK540540 min390 min540 min



Size Tolerance
Tolerance on OD
ClassificationODTolerance on ODApplicable division
Class 1Under 50mm±0.5mmApplied when there is no specification. Applicable to hot finished seamless steel tubes.
50mm or over±1%
Class 2Under 50mm±0.25mmApplied when there is no specification. Not applicable to hot finished seamless steel tubes.


Tolerance on wall thickness
ClassificationFor seamless steel tubefor other than seamless steel tubeApplicable division
WTTolerance on WTWTTolerance on WT
Class 1Under 4mm+0.6mm
-0.5mm
Under 4mm+0.6mm
-0.5mm
Applied when there is no specification. Applicable to hot finished seamless steel tubes.
4mm or over+15%
-12.5%
4mm or over to and excl.12mm+15%
-12.5%
12mm or over+15%
-1.5mm
Class 2Under 3mm±0.3mmUnder 3mm±0.3mmApplied when there is no specification. Not applicable to hot finished seamless steel tubes.
3mm or over±10%3mm or over to and excl.12mm±10%
12mm or over+10%
-1.2mm

 

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