Stainless steels are high-alloy steels with good corrosion resistance because of large amounts of chromium present in them. About 10% of chromium is present in most stainless steels.
Stainless steels are available in three different groups based on their crystalline structure. These groups include martensitic, austenitic and ferritic. The combination of martensitic and ferritic steels forms a fourth group of stainless steels known as precipitation-hardened steels.
Grade 440B stainless steel is a high carbon martensitic stainless steel containing good strength, moderate corrosion resistance and ability to obtain and maintain wear resistance and excellent resistance.
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Rockwell (HR C) | Impact Charpy V (J) |
| Annealed* | 758 | 448 | 14 | 269HB max# | - |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960 | 1830 | 4 | 57 | 9 |
| 316 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 440A |
min. max. |
0.65 0.75 |
- 1.00 |
- 1.00 |
- 0.040 |
- 0.030 |
16.00 18.00 |
- 0.75 |
- | - |
| 440B |
min. max. |
0.75 0.95 |
- 1.00 |
- 1.00 |
- 0.040 |
- 0.030 |
16.00 18.00 |
- 0.75 |
- | - |
FAQ
Q.Are you a factory or trading company?
A.We are professional manufacturer for steel pipe, and our company also is a veryprofessional a trade company for steel products.we can also provide a wide range of steelproducts.
Q.Can I get samples before order ?
A.Yes, of course. Usually our samples are free. we can produce by your samples ortechnical drawings.
Q.What is SUS 440B 430F ss pipe seamless stainless steel?
A.SUS 440B 430F ss pipe seamless is a specification for seamless and welded austenitic stainless steel pipes that perform well in high temperature and corrosive environments.
