Welded Seamless Alloy Steel Tube ASTM A554 For Mechanical 304 306
ASTM A554 Welded Stainless Steel Tubing for Mechanical 304 306
| Name | stainless steel pipe | |||||
| Items | Square tubes, round tubes, oval pipes, special shaped pipes, | |||||
| empaistic pipes, fittings | ||||||
| Standard | ASTM A554, A249, A269 and A270 | |||||
| Material Grade | 201: Ni 0.8%~1% | |||||
| 202: Ni 3.5%~4.5% | ||||||
| 304: Ni 8%, Cr 18% | ||||||
| 316: Ni 10%, Cr 18% | ||||||
| 316L: Ni10%~14% | ||||||
| 430: Cr16%~18% | ||||||
| Outer Diameter | 9.53mm--159mm | |||||
| Thickness | 0.3mm - 3.0mm | |||||
| Length | 6m or as customers' request | |||||
| a) Outer Diameter: +/- 0.2mm | ||||||
| Tolerance | b) Thickness: +/- 0.02mm | |||||
| c) Length: +/- 5mm | ||||||
| Surface | Pickling and annealing | |||||
| AP tube | ||||||
| BA tube | ||||||
| MP tube | ||||||
| EP tube | ||||||
| end treatment | 1) Plain | |||||
| 2) Beveled | ||||||
| 3) Thread with Coupling or cap | ||||||
| 4)Bending | ||||||
| Application | Liquid or gas transportation,such as oil and gas,water or chemical liquids. | |||||
| Test | Squash test, extended test, water pressure test, crystal rot test, heat treatment, NDT | |||||
| Chemical Composition of Material | Material Composition | 201 | 202 | 304 | 316L | 430 |
| C | ≤0.15 | ≤0.15 | ≤0.08 | ≤0.035 | ≤0.12 | |
| Si | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | ≤1.00 | |
| Mn | 5.5-7.5 | 7.5-10 | ≤2.00 | ≤2.00 | ≤1.00 | |
| P | ≤0.06 | ≤0.06 | ≤0.045 | ≤0.045 | ≤0.040 | |
| S | ≤0.03 | ≤0.03 | ≤0.030 | ≤0.030 | ≤0.030 | |
| Cr | 13-15 | 14-17 | 18-20 | 16-18 | 16-18 | |
| Ni | 0.7-1.1 | 3.5-4.5 | 8-10.5 | 10-14 | ||
| Mo | 2.0-3.0 | |||||
| Material Item | 201 | 202 | 304 | 316 | ||
| Mechanical Property | Tensile Strength | ≥535 | ≥520 | ≥520 | ≥520 | |
| Yield Strength | ≥245 | ≥205 | ≥205 | ≥205 | ||
| Extension | ≥30% | ≥30% | ≥35% | ≥35% | ||
| Hardness (HV) | <105 | <100 | <90 | <90 | ||
| Payment | Payment by T/T, 30% as advance payment and 70% balance pay before shipping. | |||||
| Delivery time | A.7 days if this goods is stock goods. | |||||
| B. 15 days if this goods will be produced after order | ||||||
| Validity | Valid time is 3 days for price usually. | |||||
Surface Quality:
Inside and outside surface is smooth.There is no delamination,crack,folding,double skin,twisted,pickling,residual scale or other defects.
Test Item:
Chemical Component
Tensile Test
Hydraulic Test
Eddy current Test
Flattening Test
Weld Transverse Bending Test
Intergranular Corrosion Test
Radiographic Inspection
Flanging Test
Austenitic Grain Size
Impact Test of Weld Joint
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
8. Packing and Stocking.
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
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