Cold-Formed Structural Rectangular Steel Pipe (RHS) is manufactured from hot rolled coil with a smooth surface and raised internal welds. These tubes give up weldability and greater strength and are often used as structural parts.

For joining and various other types of fabrication work, flat surfaces are the more economical solution, so rectangular steel pipes are a popular choice for mechanical, structural and architectural applications. The shape of rectangular steel pipe is easy to weld, cut, form and machine.

S235JRH Cold Formed Rectangular Steel Pipe:High durability, good electrical conductivity, excellent ductility, forming and welding performance. With high tensile strength and precise dimensions, it is very corrosion resistant and can be used in mining and excavation industrial applications.

S275J2H Cold Formed Rectangular Steel Pipe:With high yield strength and high mechanical resistance, it is used as fixed load-bearing structure in civil engineering and construction. Due to its static advantages, this flat pass is very suitable for mechanical engineering. It is also used in the automotive industry and aerospace.

S355J0H Cold Formed Rectangular Steel Pipe:Welding can be performed without intergranular corrosion. High tensile strength, heat and corrosion resistance, strong and easy to install, suitable for machinery manufacturing, steel construction engineering, shipbuilding, solar support, steel structure engineering, power engineering, etc. It is also an ideal choice for infrastructure development, petrochemical, boiler manufacturing and other industries.

S355J2H Cold Formed Square Tube:Good strength, high tensile strength, inherently toughened, easy to remove and install, perform well in any temperature range.

The available grades of rectangular steel pipes are EN, ASTM, GB and JIS.
The section size of the cold-formed structural rectangular 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
鋼管材質等級：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.

European Standard BS EN 10219-2: 2006

grade	The chemical composition is not more than Max.(%)
	C	Si	Mn	P	S	N
S235JRH	0.17	—	1.4	0.040	0.040	0.009
S275J0H	0.20	—	1.5	0.035	0.035	0.009
S275J2H	0.20	—	1.5	0.030	0.030	—
S355J0H	0.22	0.55	1.6	0.035	0.035	0.035
S355J2H	0.22	0.55	1.6	0.030	0.030	—

grade	The chemical composition is not more than Max.(%)
	C	Si	Mn	P	S	Nb	V	Al (Min.)	Ti	Ni	Mo	N
S275MH	0.13	0.50	1.50	0.035	0.030	0.050	0.08	0.020	0.050	0.30	0.20	0.020
S275MLH				0.030	0.025
S420MH	0.16	0.50	1.70	0.035	0.030	0.050	0.12	0.020	0.050	0.30	0.20	0.020
S420MLH				0.030	0.025

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	—	—	—