Mild Steel Square Pipe for Structural Frame

Mild Steel Square Pipe for Structural Frame

Our mild steel tube, square and rectangular box section products come in a variety of grades, sizes and finishes and we also offer a quick turnaround cutting service, so if we don't stock the exact hollow steel section you are after, we can cut to order and ship your steel out to you.

1. STANDARD:

GB/T3094-2000, GB/T6728-2002, ASTM A500, JIS G 3466, DIN EN 10210, GB/T178-2005

2. MATERIAL:

Q195, Q215, Q235, Q275, Q345, 20#, 45#, Stainless steel, Seamless steel, Alloy steel.

3. SURFACE:

Bared, Galvanized, Oiled, Color Paint, 3PE; Or Other Anti-corrosive Treatment.

4. TECHINQUE:

Hot rolled, Cold rolled, ERW, High-frequency welded.

5. APPLICATION:

(1).Machinery manufacture: glass machinery, agricultural machinery, textile machinery, papermaking machinery, food machinery, electrical equipment, sanitation equipment.

(2).Roads and Bridges: railway, aviation, expressway, overpass, road fence, traffic signs.

(3).Construction engineering: steel structure construction, sports venue, three-dimensional garage, exhibition hall.

(4).Decoration: wrought iron doors and windows, outdoor advertising, pavilion and vestibule, glass curtain wall.

(5).Transportation: automobile manufacture, ship manufacture, container, tricycle, tower crane.

6. SUFACE ALLOWED DEVIATION:

Assessment Criteria	First Grade			Second Grade
Wall thickness/t	4mm≤t≤10mm ±8%t	4mm≤t≤10mm ±8%t
	10mm≤t≤22mm ±6%t	10mm≤t≤22mm ±6%t
	Suitable for flat parts	Suitable for flat parts
Right Angle	90°±1.0°	90°±1.5°
Corner radius of circular arc	t≤6mm(1.5-2.5)t
	6mm≤t≤10mm(2-3)t
	T>10mm(2.5-3.5)t
Concave and convex degree	≤5% side length		≤6% side length
Bending degree	≤1.5mm/m, total bending degree ≤0.15% specified length		≤2mm/m, total bending degree ≤0.2% specified length
Distortion degree	2mm+0.5mm/m		-
Scale accuracy	Ordinary precision 0- +50mm		Ordinary precision 0- +70mm
	Fine scale 0- +5mm		Fine scale 0- +15mm
Cutting quality	100mm≤side length≤300mm		100mm≤side length≤300mm
	Cutting slope≤3mm		Cutting slope≤4mm
	300mm		300mm
	Cutting slope≤3mm		Cutting slope≤6mm
	End without cutting burr		End with few cutting burr

7. MECHANICAL PROPERTY:

Yield Strength Grade	Wall thickness(mm)	Yield strength (Mpa)	Tensile strength (Mpa)	Elongation%	Impact work (J)
235	4-12>12-22	≥235	≥375	≥23	≥27
345	4-12>12-22	≥345	≥470	≥21	≥27
390	4-12>12-22	≥390	≥490	≥19	≥27

8.What advantage do we have?

1. Our factory established in 1997, we have 16 years experience in this area.
2. We engaged in research square and rectangular steel tube at the beginning of company established, now our technology is far ahead.
3. We have a leading international, domestic origination of production units.
4. We have passed the standards of ASTM A500, JIS G 3466, DIN EN10210, GB/T178-2005, GB/T 3094-2000 and GB/T6728-2002.
5. Our products in different sizes, and different thickness (1.0mm-32mm), can satisfy your desire a station buy need.
6. Perfect after-sale service to solve your worries.

Contact us if you need more details on Structural Steel Pipe. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Steel Tube、Rectangular Tube Standard Sizes. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Stainless steel square/rectangular tube