S275JR Square And Rectangular Pipe

gnee pipe team

1. The allowable deviation of the wall thickness of square and rectangular pipes shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is not greater than 10mm. When the wall thickness is greater than 10mm, it shall be plus or minus 8% of the wall thickness. Corner and weld areas Except wall thickness.
2. The usual delivery length of square and rectangular tubes is 4000mm-12000mm, with the majority being 6000mm and 12000mm. Square and rectangular pipes are allowed to be delivered in short length and non-fixed length products of not less than 2000mm, and can also be delivered in the form of interface pipes, but the purchaser should cut off the interface pipes when using them. The weight of short-length and non-fixed-length products shall not exceed 5% of the total delivery quantity, and for square and rectangular pipes with a theoretical weight greater than 20kg/m, it shall not exceed 10% of the total delivery quantity.
3. The curvature of square and rectangular tubes shall not be greater than 2mm per meter, and the total curvature shall not be greater than 0.2% of the total length. S275JR square and rectangular tube process classification Square and rectangular tubes are divided according to the production process: hot-rolled seamless square tube, cold-drawn seamless square tube tube, extruded seamless square tube. Material Classification Square tubes are divided according to material: plain carbon steel square tubes, low alloy square tubes.

Chemical composition of S275JR square and rectangular tube
C≤0
Mn≤0
P≤0
S≤0.045
N≤0.009

S275JR square tube mechanical properties grade
S275JR tensile strength (σb/MPa): 430-580MPa, yield point (σs/MPa): ≥270MPa, elongation after break (δ5/%): ≥14, impact temperature ℃: 20, impact energy J: ≥27

S275jr Steel Square Hollow Section

S275JR square and rectangular tube production standard classification Square tubes are divided according to production standards: national standard square tube, Japanese standard square tube, British square tube, American standard square tube, European standard square tube, and non-standard square tube. Structural steel, usually delivered without heat treatment. S275 is equivalent to Q275.

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