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Introduction
A hollow structural section (HSS) is a type of metal profile with a hollow cross section.HSS members can be circular, square, or rectangular sections, although other shapes such as elliptical are also available. HSS is only composed of structural steel per code.
HSS is sometimes mistakenly referenced as hollow structural steel. Rectangular and square HSS are also commonly called tube steel or box section. Circular HSS are sometimes mistakenly called steel pipe, although true steel pipe is actually dimensioned and classed differently from HSS. (HSS dimensions are based on exterior dimensions of the profile; pipes are also manufactured to an exterior tolerance, albeit to a different standard.) The corners of HSS are heavily rounded, having a radius which is approximately twice the wall thickness. The wall thickness is uniform around the section.
Classification
1.Circular hollow sections(CHS)
2.Square hollow sections(SHS)
3.Rectangular hollow sections(RHS)
Material
1.Stainless Steel: S31254, 904L, 347H, 317L, 310S, 309, 316Ti, 321H, 304L, 304H, 316L, 316H
2.Duplex Stainless Steel: UNS S31803, S32205, S32750, S32760
Standard:ASTM A500/A1085,EN10219/10210,JIS G3466
Production Process:Cold Drawn,Cold Rolled,Bright Anneal,etc.
Advantages
1.High quality surface, clean finished.
2.Corrosion & oxidation resistance, more durable.
3.High ductility and good toughness.
4.High strength and to deform5. the use to diversity.
Applications
1.HSS, especially rectangular sections, are commonly used in welded steel frames where members experience loading in multiple directions.
2.HSS can also be used as beams.
3.The flat square surfaces of rectangular HSS can ease construction.
4.In the recent past, HSS was commonly available in mild steel, such as A500 grade B. Today, HSS is commonly available in mild steel, A500 grade C. Other steel grades available for HSS are A847 (weathering steel), A1065 (large sections up to 50 inch sq made with SAW process), and recently approved A1085 (higher strength, tighter tolerances than A500).
Standard Size(mm)
Specifications of common square tubes | Specifications of common rectangular tubes | ||
Length*Width | Thickness | Length*Width | Thickness |
20*20 | 1.5-3.0 | 30*20 | 1.5-3.0 |
25*25 | 40*20 | ||
30*30 | 50*25 | ||
40*40 | 1.5-5.0 | 50*30 | 1.5-4.0 |
50*50 | 1.5-6.0 | 60*30 | 2.0-4.0 |
60*60 | 2.0-6.0 | 60*40 | 2.0-5.0 |
65*65 | 3.0-6.0 | 70*50 | 2.0-6.0 |
70*70 | 75*50 | 2.5-5.0 | |
75*75 | 80*40 | 1.5-6.0 | |
80*80 | 2.0-8.0 | 80*50 | 3.0-6.0 |
90*90 | 4.0-6.0 | 80*60 | 2.0-6.0 |
100*100 | 2.0-10.0 | 90*50 | 4.0-6.0 |
120*120 | 3.0-10.0 | 90*60 | |
125*125 | 4.0-8.0 | 100*50 | 2.0-6.0 |
140*140 | 4.0-10.0 | 100*60 | 3.0-6.0 |
150*150 | 3.0-12.0 | 100*80 | 3.0-8.0 |
160*160 | 4.0-10.0 | 120*50 | 4.0-6.0 |
180*180 | 120*60 | 2.0-8.0 | |
200*200 | 3.0-12.0 | 120*80 | 3.0-8.0 |
250*250 | 5.0-14.0 | 140*80 | |
300*300 | 6.0-16.0 | 150*100 | 3.0-10.0 |
350*350 | 150*50 | 3.0-6.0 | |
400*400 | 150*75 | ||
500*500 | 160*60 | 4.0-6.0 | |
160*80 | 3.0-8.0 | ||
180*100 | 4.0-8.0 | ||
200*100 | 3.0-10.0 | ||
200*150 | 4.0-12.0 | ||
200*80 | 4.0-8.0 | ||
250*150 | 4.0-12.0 | ||
250*200 | 5.0-12.0 | ||
300*100 | 4.0-10.0 | ||
300*150 | 5.0-12.0 | ||
300*200 | |||
400*200 | 6.0-14.0 | ||
400*300 | 8.0-16.0 | ||
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