China Wuxi Square pipe manufacturers can produce all kinds of material models of square pipe and rectangular pipe delivery fast quality assurance

Quick Detail:

Square and rectangular tubes are a common building material with unique shapes and structures. It is made of high-strength steel or other alloy materials and usually has square and rectangular sections. This design makes square and rectangular tubes widely used in many fields.

Square rectangular tube materials include:America：Cr.B Gr.D

Europe：S185 S235JR S235JRGl S235JRG2 040 A10 A12 080A15 S235JO S235J2G3 S235J2G4

Japan：SS330 SPHC SPHD SS400 SM400A SM400A (SM41A) SM400B (SM41B)

ISO：E235C E235D ISO630 E235B E355DD E355E S420CC

China：Q195 Q235A Q235C Q235B Q235D 20# 45#

America ASTM ：Grade42[290] Grade50[345] Grade55[380] Grade 55[380] Grade

65[450] Type8Grade80[550] 100[690]TypeQ100w[690W]TypeQ

Europe DIN EN：E295(1.0050) E335(1.0060) S355JR(1.0045) S355JO(1.0553) S355J2(1.0577) S355NL(1.0546) S460NL(1.8903) S460ML(1.8838)S500Q(1.8924)S500QL(1.8909) S500QL1(1.8984) S550Q(1.8904) S550QL(1.8926) S550QL1(1.8986) S690Q(1.8931) S690QL(1.8928) S690QL1(1.8988)

Japan JIS：SPFC490 SPFC590 STKT540 SEV295 SM570 SMA570W SMA570P SPFC980Y SHY685

ISO：E275 E355 E460 E550 E690

China：Q355B Q355D Q355E Q420C Q420D Q420E Q460D Q500D Q550D Q550E Q690D Q690E

Description:

Hot-rolled square pipe and cold-rolled bright square pipe are two common steel pipe products, they have some differences in production process, surface treatment and use.

First, the hot-rolled square pipe is made by heating the billet to high temperature and continuously pressing it on the roller table. Due to high temperature heating, its internal structure has been improved, with good mechanical properties and toughness. In addition, the surface roughness of the hot-rolled square pipe is relatively high, and there may be a certain degree of oxidation or rust.

In contrast, the cold-rolled bright square pipe is deformed by cold drawing the steel coil at room temperature for several times. Because it has not undergone high-temperature heating treatment, its internal grain structure remains dense, and it has better dimensional stability and surface quality. Cold-rolled bright square pipes are usually treated with polishing and other processes to give them a smoother and brighter appearance.

Applications:

Hot-rolled square pipe and cold-rolled bright are also slightly different in the field of application. Hot rolled square pipe is widely used in construction, bridge, machinery manufacturing and other fields need to bear large loads and high strength requirements. The cold-rolled bright square pipe is mainly used in decoration, home, electronic equipment and other high appearance quality requirements and do not need to bear large loads.

In general, both hot-rolled square pipe and cold-rolled bright square pipe have their own characteristics and advantages, and the appropriate material and specifications should be selected according to the specific needs in actual use.

Specifications:

Competitive Advantage:

• We have 16 square pipe production lines, raw steel coil we maintain inventory of more than 100,000 tons, all kinds of materials of steel coil inventory we have everything, and have their own steel coil slitting machine, can achieve customer orders within three days of rapid delivery.

• We have a professional quality inspection department, each quality inspector has more than three years of learning and training, and a production line is equipped with at least 6 quality inspectors 24 hours day and night in turn quality testing, to ensure that the product pass rate reaches 100%, for the company's products at home and abroad to create a good reputation.

• The company has a complete and scientific quality management system, including: CE certification, Japanese JIS certification, EN10219 certification EN10210 certification, EPD (Environmental Product Declaration) Environmental product declaration, French BV certification, American ABS Classification Society certification Norsk Veritas certification, environmental management system certification, ISO9001 certification, etc.