Square hollow section

Product Detail

Overview

Application

It Is Mainly Used for Mechanical structure，general structure.

Main Grade

S235JRH, S275JOH, S275J2H, S355JOH, S355J2H,S355K2H

Chemical Component

Stell grade		Type of deoxidation^a	% by mass, maximum
Steel name	Steel nmber	Type of deoxidation^a	C	Si	Mn	P	S	N^b
S235JRH	1.0039	FF	0.17	—	1.4	0.04	0.04	0.009
S275J0H	1.0149	FF	0.2	—	1.5	0.035	0.035	0.009
S275J2H	1.0138	FF	0.2	—	1.5	0.03	0.03	—
S355J0H	1.0547	FF	0.22	0.55	1.6	0.035	0.035	0.009
S355J2H	1.0576	FF	0.22	0.55	1.6	0.03	0.03	—
S355K2H	1.0512	FF	0.22	0.55	1.6	0.03	0.03	—
a The deoxidation method is designated as follows: FF: Fully killed steel containing nitrogen binding elements in amounts sufficient to bind available nitrogen (e.g, min. 0,020 % total Al or 0,015 % soluble Al). b The maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0.020 % with a minimum AlN ratio of 2:1, or if sufficient other N-binding elements are present. The N-binding elements shall be recorded in the Inspection Document.

Mechanical Property

Steel Grade		Minimum yield strength R_eH MPa		tensile strength R_m MPa		Minimum elongation A^d %	Minimum impact energy KV^e J
Steel name	Steel number	Specified thickness mm		Specified thickness mm		Specified thickness mm	at test temperature of
		≤16	＞ 16≤ 40	﹤3	≥3≤ 40	≤ 40	-20℃	0℃	20℃
S235JRH^a	1.0039	235	225	360-510	360-510	24^b	-	-	27
S275J0Hc^a	1.0149	275	265	430-580	410-560	20^c	-	27	-
S275J2H	1.0138						27	-	-
S355J0H^a	1.0547	355	345	510-680	470-630	20^c	-	27	-
S355J2H	1.0576						27	-	-
S355K2H	1.0512						40^f	-	-
a The impact properties are verified only when Option 1.3 is specified. b For thicknesses >3 mm and section sizes D/T < 15 (round) and (B+Hy2T < 12,5 (square and rectangular) the minimum elongation is reduced by 2. For thicknesses ≤ 3 mm the minimum value for elongation is 17 %. c For section sizes DIT < 15 (circular) and (B+Hy2T < 12,5 (square and rectangular) the minimum elongation is reduced by 2. d For thicknesses < 3 mm see 9.2.2. e For impact properties for reduced section test pieces see 6.7.2. f This value corresponds to 27J at-30 °C (see EN 1993-1-1).

Test Requirement

Elongation, Tensile strength and yield strength; Tensile test in accordance with EN 10002-1; Impact strength; Impact test in accordance with EN 10045-1;Weldability; Chemical analysis in accordance with the methods listed in CR 10261.