Reliable Steel is a leading distributors and exporter of Ferritic Martensitic pipes in mostly countries. We offer best quality ferritic martensitic pipes but we are specialised in ASTM A268 TP 446 tubes. These tubes are used for applications that require better mechanical properties, like hardness, crevice and stress corrosion.
Email us Whatsapp us Call us
TP446 has higher modulus and thus lighter walls can be used without vibration issues. The ASTM A268 TP446 Tube is ferritic stainless steel alloy which is non-heat treatable. They are known for offering good resistance to oxidation, corrosion, and high temperature. The 446 Stainless Steel Tube is easily weldable using traditional methods except the oxyacetylene welding.
The tube comes with increased cr content and hence are tough to bend, draw and weld. They are suitably used within the temperature range of 1500-2100°F but their high temperature strength is quite low. They show high steam and water droplet resistance which offers a great cushioning for extensive conditions.
| Grade | TP 446-1 | TP 446-2A |
| UNS DesignationB |
S44600 | S44600 |
| Element | Composition, % | |
| C, max | 0.20 | 0.12 |
| Mn, max | 1.50 | 1.50 |
| P, max | 0.040 | 0.040 |
| S, max | 0.030 | 0.030 |
| Si, max | 0.75 | 0.75 |
| Ni | 0.50max | 0.50max |
| Cr | 23.0-30.0 | 23.0-30.0 |
| Mo | … | … |
| Al | … | … |
| Cu | … | … |
| N | 0.10-0.25 | 0.10-0.25 |
| Ti | … | … |
| Grade | Yield Strength 0.2% Proof min (MPa) | Tensile Strength min | Elongation (% in 50 milimeter) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 446 | 275 | 485 | 20 | 92 | 201 |