
Threeway Steel Co., Ltd
E-mail: sales@srtsteelpipe.com
Address: 22nd Floor, Royal Wing Tower, Long Champ International Building, No.9 Xiangfu Road, Changsha, Hunan, China, PC: 410116Phone:0086-731-8873-9521

Keywords :Q355 Series Square and Rectangular Tube Update : 2026-09-22 View(s) : 155
Selecting Q355 square and rectangular tubes requires more than confirming nominal yield strength. Grades Q355B, Q355C, Q355D, and Q355E differ significantly in impact toughness, with B-grade suitable for 20°C environments, C-grade for 0°C, D-grade for -20°C, and E-grade for -40°C extreme ...

Keywords :square and rectangular tubes Update : 2026-09-21 View(s) : 108
Square and rectangular steel tubes are widely used in agricultural machinery, greenhouse structures, and farm equipment due to their high strength, lightweight design, and fabrication flexibility. They are ideal for manufacturing equipment frames, trailers, brackets, greenhouse columns, b...

Keywords :rectangular and square tubes building steel structures Update : 2026-09-20 View(s) : 120
Square and rectangular steel tubes , also known as hollow structural sections (HSS), are essential for modern building construction. Their closed-section design offers superior resistance to axial loads, bending, and torsion, making them ideal for columns, beams, and roof trusses. Square t...

Keywords :square and rectangular tubes Update : 2026-09-18 View(s) : 124
Selecting the right square and rectangular tubes (HSS) requires more than checking dimensions; understanding the applicable global standard is critical for structural integrity. This guide compares three major standards: China's GB/T 6728, North America's ASTM A500, and Europe's EN 10219. ...

Keywords :ERW steel pipes Update : 2026-09-11 View(s) : 121
ASTM A53 Grade B ERW steel pipes are widely used in industrial applications, but the localized heating during welding can alter the metallurgical properties of the weld zone and heat-affected zone (HAZ). To address this, heat treatment is often applied to reduce brittleness, eliminate res...