21Cr-6Ni-9Mn is a high manganese nitrogen strengthened, austenitic stainless steel. It combines high strength in the annealed condition, excellent resistance to oxidation at high temperatures as well as good resistance to lead oxide and a high level of corrosion resistance at ambient temperatures. The alloy can be fabricated and formed much the same as type 304 and 316, and is readily weldable. It remains nonmagnetic after severe cold work.
Available tube product forms
Typical Applications
Typical manufacturing specifications
- AMS 5561
- Also individual customer specifications.
Industries predominantly using this grade
Technical Data
Mechanical Properties
| Temper |
Annealed |
Cold-worked |
| Tensile Rm |
95 |
ksi (min) |
142 |
ksi (min) |
| Tensile Rm |
655 |
MPa (min) |
979 |
MPa (min) |
| R.p. 0.2% Yield |
48 |
ksi (min) |
120 |
ksi (min) |
| R.p. 0.2% Yield |
330 |
MPa (min) |
827 |
MPa (min) |
| Elongation (2” or 4D gl) |
35 |
% (min) |
20 |
% (min) |
Physical Properties (Room Temperature)
| Specific Heat (0-100°C) |
500 |
J.kg-1.°K-1 |
| Thermal Conductivity |
14 |
W.m -1.°K-1 |
| Thermal Expansion |
16.7 |
μm/μm/°C |
| Modulus Elasticity |
19.6 |
GPa |
| Electrical Resistivity |
73 |
μohm/cm |
| Density |
7.83 |
g/cm3 |
Chemical Composition (% by weight)
| Element |
Min |
Max |
| C |
- |
0.08 |
| Mn |
8 |
10 |
| Ni |
5.5 |
7.5 |
| Cr |
19 |
21.5 |
| Fe |
Balance |
| Mo |
1.5 |
3 |
| N |
0.15 |
0.4 |
| Si |
- |
1 |
| P |
- |
0.06 |
| S |
- |
0.03 |