Our services: 1.Special design avaliable according to requirements. 2.All production processes are under ISO 9001-2008 strictly 3.Free sample 4.Acceptable for any third party inspection(SGS,BV...) 5.OEM is ok. 6.Visit factory any time. All items of our products and related tests as follow : 1.ERW black round pipe (ASTM A53,GB..) 2.Weld black square/rectangular pipe(ASTM A500,GB,...) 3.Hot dip galvanized round pipe (BS 1387,ASTM A53,GB ,...) 4.Hot dip galvanized square/rectangular pipe(ASTM A500,GB...) 5.Pre-galvanized square/rectangular/round pipe,cold rolled black annealed or bright finished pipe. 6.Spiral steel pipe 7.Seamless pipe (ASTM A53,A106B,) 8.Oval pipe in galvanized and black surface 9.LTZ... special sizes pipe 10.Steel prop , steel plank,steel scaffolding pipe and Accessories... steel constrctution material 11.Steel angle, Flat bar,round bar,sqaure bar, 12.H,I,U,C,T,Y,W...steel beam/channel 13.Deformed steel bar 14.Hot rolled& cold rolled steel sheet/coil in black,galvanized,color coated surface. Plastic Grilles,Plastic Return Air Grille,Plastic Air Vent Grilles,Plastic Ventilation Grilles Guangzhou Jointair Co., Ltd. , https://www.jointairaccessories.com
Galvanized Square Hollow Section Q235 Q345
I.Product Basic Info:
 Shape:
round/sqaure/rectangular/oval               or other special section tube
 OD:
20-219.1mm, WT: 0.8-12mm      Â
 Size:
10*10-400*400mm,WT:0.8-12mm
 Size:
10*20-400*600mm, WT:0.8-12mm
 length:
0.3-13m     (as customers' request)
Surface:
Pre-galvanized/Hot Dip Galvanized/Oiled/Painted/Bared , can be dealed as customers'need
Zinc Coating:
50-150g/m2 for Pre- galvanized, more than 200g/m2 for hot dip galvanized.or as clients'need
Material:
Q195/Q215/Q235/Q345/Q195-Q235 ABCD
Standard:
ASTM-A53Â Â Â /BS 1387-1985/Â Â Â GB/T 3091-2001 for round pipe
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ASTM A500Â /GB/T3094Â Â Â Â Â Â Â for square/rectangular pipe
 Manufacturing Technique
Weld/Seamless/Â Â Â Â Â ERW/ SSAW/ LSAW /Â Â Â Â Â Cold Drawn/ Hot Drawn
 Ends:
Plain /Beveled/ Threaded with sockets coupling and plastic caps/ Necking down/ Expanding neck/ Punching holes
Grade
Chemical Composition
Mechanical Properties
C
Mn
Si
S
P
Yield
Tensile
Elongati
Strength Mpa
Strenth Mpa
-on %
Q195
0.06-0.12
0.25-0.50
≤0.30
≤0.045
≤0.05
≥195
315-430
≥33
Q215
0.09-0.15
0.25-0.55
≤0.30
≤0.05
≤0.045
≥217
335-450
≥27
Q235
0.12-0.20
0.30-0.67
≤0.30
≤0.045
≤0.04
≥235
375-500
≥26
Q345
≤0.20
1.00-1.60
≤0.55
≤0.04
≤0.04
≥345
470-630
≥22
2) Market: All of the world
3) Application: Widely
4) Ensure quality and after-sales service
5) O. D.: 15*15~400*400mm
6) W. T.: 0.8-14.0mm
7) Length: 3-12m
8) Zinc content: 220--400g/square metre
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Shopping Websites Galvanized Square Steel Pipe Material Ss400 China Manufacture
Size: 10*10-400*400mm
Grade: Q235, Q345
Thickness: 0.6-12mm
Length: Stock 6m, Can Be Customer Made
Zinc Coating: Usually 40G/M2, Can Be Customer Made
Trademark: TYT
Transport Package: in Bundle
Specification: API-5L ASTM-A53, Bs1387-1985, GB/T3091-2001
Origin: Tianjin China
HS Code: 73066100
Thick Wall ERW Galvanized Steel Pipe