Product Details

Specifications

Steel Tube of Rectangular Section
1.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

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
Yield Strength Grade	(mm)	(Mpa)	Tensile Strength (Mpa)	(%)	(20°C) Impact Value J
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

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

Contact Information Mild Steel Square Hollow Sections