Ferritic / Martenstic Stainless Steel Tube Astm A268 Tp304 Seamless Iso Certificated
ASTM A268 TP304 Seamless Ferritic and Martenstic Stainless Steel Tubing
Size range: O.D.:4-230mm W.T.:1-30mm L: according to customer requirement
Steel Grade and Chemical Compositions:
TP405, TP410, TP429, TP430, TP443, TP446-1, TP446-2, TP409
| Grade: | TP4 05 | TP4 10 | TP2 49 | TP4 30 | TP4 43 | TP4 46-1 | TP4 46-2 | … | TP4 09 |
| UNS | S40500 | S41000 | S42900 | S43000 | S44300 | S44600 | S44600 | S40800 | S40900 |
| C, max | 0.08 | 0.15 | 0.12 | 0.12 | 0.20 | 0.20 | 0.12 | 0.08 | 0.08 |
| Mn,max | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.50 | 1.50 | 1.00 | 1.00 |
| P, max | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.045 | 0.045 |
| S, max | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.045 | 0.045 |
| Si, max | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Ni | 0.50max | … | … | … | 0.75max | 0.75max | 0.50max | 0.80max | 0.50max |
Cr | 11.5- 14.5 | 11.5- 13.5 | 14.0- 16.0 | 16.0- 18.0 | 18.0- 23.0 | 23.0- 27.0 | 23.0- 27.0 | 11.5- 13.0 | 10.5- 11.7 |
| Mo | … | … | … | … | … | … | … | … | … |
| Al | 0.10- 0.30 | … | … | … | … | … | … | … | … |
| Cu | … | … | … | … | 0.90- 1.25 | … | … | … | … |
| N | … | … | … | … | … | 0.25 | 0.25 | 12xCmin | 6xCmin |
| Ti | … | … | … | … | … | … | … | 1.10max | 0.75max |
Manufacture:
Tubes are made by the seamless process.
Heat treatment:
As a final treatment, tubes shall be reheated to a temperature of 1200℉(650℃) or higher and cooled (as appropriate for the grade) to meet the requirements of this specification.
The martensitic grade UNS S41500 shall be reheated to a temperature of 950℉ (510℃) or higher and cooled as appropriate to meet the requirements of this specification.
Surface Condition:
The finished tubes are free of scale., slight amount of oxidation is not considered as scale.
Test and Inspection:
Mechanical Test
- Tension Test
- Flaring Test
- Flange Test
- Reverse Test
- Hardness Test
- Hydrostatic or Nondestructive Electric Test
Applications: for general corrosion-resisting and high-temperature service.
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