Descriptions

Square Steel Tubes (SHS) are ideal when symmetrical and aesthetically pleasing hollow profiles are required, along with an ideal balance of strength and practicality.

Cold-formed square steel pipes are made of custom-made steel strips or custom-made steel plates directly into a square shape by cold forming, and then completed by a high-frequency welding process.

Characteristics of cold formed square pipe

S235JRH Cold Formed Square pipe:

Non-magnetic, easier to strengthen and harden by cold working process. Has good machinability and excellent fire resistance. Widely used in civil engineering and construction industries, such as building buildings, bridges and dams.

S275J0H Cold Formed Square pipe:

Due to its important properties such as high tensile strength and high resistance to electrical conductivity, it is mainly used to transport electricity, water, etc.

S275J2H Cold Formed Square pipe:

Rust-free, corrosion-resistant, and easy to use in high-temperature environments. It has durability, high tensile strength, and strong resistance to acidic environments, and is mostly used in food processing equipment and food packaging equipment.

S355J0H Cold Formed Square pipe:

High tensile strength, corrosion resistance, heat resistance, sturdy, easy to install, it has great uses in steel structure, solar bracket, electric power, steel structure engineering, steel structure engineering, machinery manufacturing, shipbuilding, etc. Can also be used in food processing units and food packaging units.

S355J2H Cold Formed Square pipe:

Has better static properties. In addition, lighter construction, less resistance to water and air, and good visuals give it an edge. Suitable for industrial applications with small surface and interior space, such as wire, cable, concrete, etc. It can be used effectively in the temperature range of 932°F to 1472°F (500°C to 800°C).

Product supply

The available grades of square steel pipes are EN, ASTM, GB and JIS.
The section size of the cold-formed structural square steel pipe can reach 800mm and the thickness can reach 35mm. The normal supply length is 6m~12m, but other lengths of 4m~16m can be provided upon request. Additionally, other lengths are available upon request. This meets almost all international quality standards and undergoes various tests.

Steel pipe implementation standard:EN 10219-2 : 2006
Steel pipe material grade:S235JRH，S275J0H，S275J2H，S355J0H，S355J2H，S275NH，S420MH，S460MH， IS 4923 / ASTM A500

Cold-formed square tubes can be used in their natural state or can be shot peened, primed sawed, drilled or milled.
Surface Protection: Black (Natural Uncoated), Clear/Oil Coated, Pre-Galvanized, Hot-Dip Galvanized
Metal slings are generally bundled into rectangles for storage and transportation.

Pipe Specifications

European Standard BS EN 10219-2: 2006

size（D x B）	thickness（t）	unit weight
mm	mm	kg/m
20 x 20	2	1.05
25×25	2	1.36
	2.5	1.64
	3	1.89
30 x 30	2	1.68
	2.5	2.03
	3	2.36
40×40	2	2.31
	2.5	2.82
	3	3.3
	4	4.2
50×50	2	2.93
	2.5	3.6
	3	4.25
	4	5.45
	5	6.56
60 x 60	2	3.56
	2.5	4.39

Chemical Composition

grade	The chemical composition is not more than Max.(%)
	C	Si	Mn	P	S	N
S235JRH	0.17	—	1.4	0.04	0.04	0.009
S275J0H	0.2	—	1.5	0.035	0.035	0.009
S275J2H	0.2	—	1.5	0.03	0.03	—
S355J0H	0.22	0.55	1.6	0.035	0.035	0.009
S355J2H	0.22	0.55	1.6	0.03	0.03	—

grade	The chemical composition is not more than Max.(%)
	C	Si	Mn	P	S	Nb	V	Al	Ti	Ni	Mo	N
								(Min.)
S275MH	0.13	0.5	1.5	0.035	0.03	0.05	0.08	0.02	0.05	0.3	0.2	0.02
S275MLH				0.03	0.025
S420MH	0.16	0.5	1.7	0.035	0.03	0.05	0.12	0.02	0.05	0.3	0.2	0.02

Mechanical Behavior

grade	Yield strength not less than Min.（N/mm2）						tensile strength（N/mm2）
	t≤16	16<t≤40	40<t≤63	63<t≤80	80<t≤100	100<t≤120	t≤3	3<t≤100	100<t≤120
S235JRH	235	225	215	215	215	195	360~510	360~510	350~500
S275J0H	275	265	255	245	235	225	430~580	410~560	400~540
S275J2H
S355J0H	355	345	335	325	315	295	510~680	470~630	450~600
S355J2H
S275MH	275	265	—	—	—	—	360~510	360~510	—
S275MLH
S420MH	420	400	—	—	—	—	500~660	500~660	—
S420MLH

grade	The elongation is not less than Min.（%）				Minimum impact energy KV（J）
	t≤40	40<t≤63	63<t≤100	100<t≤120	-50℃	-20℃	0℃	+20℃
S235JRH	26（24）	25	24	22	—	—	—	27
S275J0H	23（20）	22	21	19	—	—	27	—
S275J2H					—	27	—	—
S355J0H	22（20）	21	20	18	—	—	27	—
S355J2H					—	27	—	—
S275MH	24	—	—	—	—	40	—	—
S275MLH					27	—	—	—
S420MH	19	—	—	—	—	40	—	—
S420MLH					27	—	—	—