1. Quick Details:
| Type | Stainless |
| Production | Welded |
| Application | Agricultural machinery, construction industry,etc |
| OD | 5-420mm |
| WT | 0.5-25mm |
| Length | 5.8m for 20GP, 11.8 for 40HQ |
| Production | 25-30 days |
| Surafce | Pickling or blank tube |
| Heat Treatment | Annealing |
| Package | Packing in seaworthy package |
2.Product Details:
(1) Diemension:
OD≤406.4mm
WT≥0.51mm
(2) Delivery condition:
1. As welded
2. Welded and annealed
3. Cold reduced
4. Cold reduced and annealed
(3)Inside diameter bead:
a. Bead not removed
b. Bead controlled to 0.005 in. (0.13mm) or 15% of the specified wall thickness, whichever is greater
c. Bead removed
(4)Type one: Pickling Pipe
Size: OD:0.23''-80''(5.8-2032mm)
WT:0.01''-1.125''(0.25-28mm)
ANSI/ASME size as under,
NPS:1/8''-80'' SCH:5/5s,10/10s,20/20s,40/40s,80/80s,120/120s,160/160s acc. to ANSI B36.19/36.10
other standard of size is for ready choice.
Length: according to clients' request.
Standard:JIS DIN GB BS ASTM(ASME) etc.
Surface Finish: Annealed,Polish,Brush etc.
Application:for fluid and gas transport structure and machining.
Packing:Plywood cases or bundles.
Type two: Bright Annealed Tube
Size: OD range:6-50.8mm WT range:0.71-3.68mm Length:6-24m
Standard:ASTM A249, EN 10217-7, etc
Process Method:Welded ,bright annealed.
Surface Finish:Bright Annealed(BA),pickling,bright annealed(BA)&polish
Packing:
In bundles with outside protection and seaworthy packing
Wooden box, crate, cartons, with a lifts on the bundles for easy loading and unloading
Stainless steel square tubes are commonly used in construction, architectural, commercial, and industrial applications due to their excellent resistance to corrosion and high strength-to-weight ratio. The chemical composition and mechanical properties of commonly used stainless steel types for square tubes are summarized in the table below:
| Stainless Steel Type | Chemical Composition (%) | Mechanical Properties |
| TP304L | C ≤ 0.035, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.030, Cr 18.0-20.0, Ni 8.0-12.0 | Tensile Strength: ≥ 485 MPa, Yield Strength: ≥ 170 MPa, Elongation: ≥ 35% |
| TP316L | C ≤ 0.035, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.030, Cr 16.0-18.0, Ni 10.0-14.0, Mo 2.0-3.0 | Tensile Strength: ≥ 485 MPa, Yield Strength: ≥ 170 MPa, Elongation: ≥ 35% |
| TP347 | C ≤ 0.08, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.030, Cr 17.0-20.0, Ni 9.0-13.0, Nb+Ta 8xC-1.10 | Tensile Strength: ≥ 515 MPa, Yield Strength: ≥ 205 MPa, Elongation: ≥ 35% |
| TP347H | C ≤ 0.04-0.10, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.030, Cr 17.0-20.0, Ni 9.0-13.0, Nb+Ta 8xC-1.10 | Tensile Strength: ≥ 515 MPa, Yield Strength: ≥ 205 MPa, Elongation: ≥ 35% |
| TP321H | C ≤ 0.04-0.10, Si ≤ 1.00, Mn ≤ 2.00, P ≤ 0.045, S ≤ 0.030, Cr 17.0-19.0, Ni 9.0-12.0, Ti 5xC-0.70 | Tensile Strength: ≥ 515 MPa, Yield Strength: ≥ 205 MPa, Elongation: ≥ 35% |
QUALITY CONTROL:
1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
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