Austenitic & Super Austenitics Steels
TP 321 • UNS S32100 • 1.4541
Grade 321 stainless steel (1.4541) is a heat resistant grade supplied into numerous industry sectors. The key property of this grade is the added titanium content (5 x C%) stabilising the material and making its resistance to carbide precipitation when exposed to high temperatures and resistance to oxidation its main characteristics.
Whilst retaining good strength and corrosion resistance when exposed to high temperatures, this grade of stainless steel like most austenitic grades will also maintain its strength and toughness at sub-zero temperatures, making this an excellent choice for various applications ranging from oil refinery equipment to automotive exhaust systems. This heat resistant grade of stainless steel has a maximum dry air service temperature of 850oC.
- Typical manufacturing specifications
ASTM A213, ASTM A269, ASTM A312, ASTM A632 Also individual customer specifications.
- Industries predominantly using this grade
Exhaust Systems, Manifolds, Chemical Plant , Heat Exchangers, Furnace Parts, Chimney and Stack Liners
Technical Data
Chemical composition(% by Weight)
Element | C | Mn | P | S | Si | Ni | Cr |
|---|---|---|---|---|---|---|---|
Minimum | - | - | - | - | - | 9.0 | 17.0 |
Maximum | 0.080 | 2.00 | 0.045 | 0.030 | 1.00 | 12.0 | 19.0 |
Aiming | 0.045 | 1.4 | 0.025 | 0.002 | 0.3 | 9.2 | 17.3 |
Mechanical Properties
| Specifications(Tubing, Annealed) | Actual data | |||
|---|---|---|---|---|
Tensile Rm | 75 | ksi (min.) | 79 ~ 98 | ksi |
Tensile Rm | 515 | MPa (min.) | 550 ~ 680 | MPa |
Yield (R.p. 0.2%) | 30 | ksi (min.) | 35 ~ 56 | ksi |
Yield (R.p. 0.2%) | 205 | MPa (min.) | 250 ~ 370 | MPa |
Elongation | 34 | % (min.) | 45 ~ 52 | % |
