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Specifications
Steel Tube of Rectangular Section1.seamless ,welded,galvanized,stainless square tube
2.OD:15x15-800x800mm 20x20--600x800mm
Mild Steel Square Hollow Sections
ASTM Gr.D Steel Tube Rectangular section
Product Description Mild Steel Square Hollow Sections
Technical requirements: Mild Steel Square Hollow Sections
Chemical Composition:
Yield Strength Grade |
Demotic Raw-material Grade |
235 |
Q235B, Q235C, Q235D, Q235qC, Q235qD |
345 |
Q345A, Q345B,Q345C,Q345D,Q345Qc, Q345Qd, StE355, B480GNQR |
Carbon Equivalent:
Ceq(%)=C+Mn/6+Si/24 +Ni/40+Cr/5+Mo/4+V/14
Ⅰgrade product Ceq(%)
Yield Strength Grade |
235 |
345 |
390 |
Ceq(%) |
≤0.36 |
≤0.43 |
≤0.45 |
Note: In order to improve the performance of steel,390 could add the microelement such as V, Nb, Ti, Mo and N etc. | |||
Mechanical Property:
Yield Strength Grade |
W.T |
Yield Strength |
Tensile Strength (Mpa) |
Elongation |
(20°C) Impact Value J |
(mm) |
(Mpa) |
(%) |
|||
235 |
4~12>12~22 |
≥235 |
≥375 |
≥23 |
≥27 |
345 |
4~12>12~22 |
≥345 |
≥470 |
≥21 |
≥27 |
390 |
4~12>12~22 |
≥390 |
≥490 |
≥19 |
≥27 |
Production Flow : Mild Steel Square Hollow Sections
Technoligy: gradually roll-extruded to square steel tube.(3)
Adcvange:Adopt multichannel gradually continuous deformation,could eddiciently reduce the inner stress and damage of R angles.We reached the industy and international leading level of precise control of Outer Dimensions of R Angles,as well as Twist and Distortion.
Contact Information Mild Steel Square Hollow Sections
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