NAS NM15M；High Strength and Non-Magnetic Stainless Steel
Characteristics of NAS NM15M
A high-manganese austenitic stainless steel, NAS NM15M, with a composition of 17Cr-15Mn-4Ni provides higher strength than conventional non-magnetic austenitic stainless steels, and NAS NM15M does not magnetize even if cold worked with force.
Chemical Composition of NAS NM15M
(%)
| - | C | Si | Mn | Ni | Cr | N |
| NM15M | 0.08 | 0.8 | 14.5 | 4.3 | 17.0 | 0.33 |
Mechanical Properties
| - | Thickness (mm) | 0.2% Proof stress （MPa） |
Tensile strength （MPa） |
Elongation （％） |
Hardness （HV） |
| Example | 0.8 | 470 | 790 | 45.3 | 211 |
Magnetic Permeability
Effect of Cold Rolling and Aging
Work Hardening Behavior
Work hardening behavior
Spring Deflection Limit
Spring deflection limit
Corrosion Resistance
Pitting Corrosion Resistance
Pitting corrosion potential
(V)
| - | Solution Treated | 60% Cold Reduced |
| 3.5%NaCl，30℃ | 0.34 | 0.31 |
Atmospheric Corrosion Resistance
Salt water spraying Test
| - | Solution Treated | 60% Cold Reduced |
| 3.5%NaCl，30℃ | No Rust | No Rust |
Wear Resistance
Wear resistance of NAS NM15M
| - | ＮＡＳ ＮＭ１５Ｍ | Type 305 as a reference |
| Wear width（μｍ） | ２２－２５ | ２０－２５ |
Specimen: 60% cold rolled material
Surface area of wear tested: 1×17 ㎜, Magnetic tape running: 3 hours
