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NAS NM15MGHigh 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
iMPaj
Tensile strength
iMPaj
Elongation
i“j
Hardness
iHVj
Example 0.8 470 790 45.3 211

Magnetic Permeability

@@@@@@NAS NM15M

Effect of Cold Rolling and Aging

Work Hardening Behavior

@@@@@@NAS NM15M
@@@@@@NAS NM15M

@@@@@@@@@@@@@@@@@@ Work hardening behavior

Spring Deflection Limit

@@@@@@NAS NM15M

@@@@@@@@@@@@@@@@@@@@Spring deflection limit

Corrosion Resistance

Pitting Corrosion Resistance

@Pitting corrosion potential

(V)

- Solution Treated 60% Cold Reduced
3.5%NaClC30Ž 0.34 0.31

Atmospheric Corrosion Resistance

@Salt water spraying Test

- Solution Treated 60% Cold Reduced
3.5%NaClC30Ž No Rust No Rust

Wear Resistance

Wear resistance of NAS NM15M

- ‚m‚`‚r ‚m‚l‚P‚T‚l Type 305 as a reference
Wear widthi삍j ‚Q‚Q|‚Q‚T ‚Q‚O|‚Q‚T

Specimen: 60% cold rolled material

Surface area of wear tested: 1~17 ‡o, Magnetic tape running: 3 hours

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