Nippon Yakin Kogyo NASNM15M Non-Magnetic Alloys

Manufacturer: Nippon Yakin Kogyo Co., Ltd
Model : NASNM15M

NASNM15M
Non-Magnetic High-Strength Stainless Steel

Nippon Yakin developed NASNM15M, a high-manganese austenitic stainless steel, with a composition of 17Cr-15Mn-4Ni.A high-manganese austenitic stainless steel, NASNM15M was developed by Nippon Yakin with a composition of 17Cr-15Mn-4Ni. Providing higher strength than conventional non-magnetic austenitic stainless steels, NASNM15M does not magnetize even if cold worked with force. Nippon Yakin supplies this product in plate, sheet, and strip forms.

Chemical Composition17Cr-15Mn-4Ni-0.3N

Product shape

CoilSheet

Plate

WorkabilityThe hot and cold workability of NASNM15M is basically the same as that of standard austenitic stainless steels such as Type 304, Type 316, etc. However, it is important to consider that this is a high-strength material in both cold and hot working processes.
Heat TreatmentThe heat treatment is similar to austenitic stainless steels. The typical heat treatment is as follows: Solution heat treatment: 1050~1150°C; rapid cooling.

Steel Grade/Standard

Nippon Yakin GradeJISASTM
NASNM15M

Chemical Composition

Specification (NASNM15M)CSiMnPSNiCrN
0.040~0.090≦0.9014.00~15.00≦0.045≦0.0154.00~4.6016.50~17.500.30~0.35

Physical Properties

Density[g/cm³]8.00
Specific heat[J/kg·K]480
Electrical resistivity[µΩ·cm]77
Thermal conductivity[W/m·K]13.2
Average coefficient of thermal expansion[10⁻⁶/°C]30~100°C: 16.0
30~300°C: 17.7
30~500°C: 19.2
30~700°C: 20.3
Young’s modulus[MPa]19.6 × 10⁴
MagnetismNone
Melting range[°C]1360~1412

Mechanical Properties

Mechanical Properties at Room Temperature

Specification (NASNM15M)0.2% proof stress [MPa]Tensile strength [MPa]Elongation [%]Hardness [HV]
Specification (NASNM15M)≧390≧690≧30≦240
Cold-rolled sheet46178945211

High Temperatures Strength

Work Hardening

Permeability

Even when cold working is applied, there is no variation in the relative permeability, and NASNM15M does not become magnetized.

Age Hardening Behavior

After cold-rolling, the hardness of NASNM15M can be raised to between 50 and 70 Hv with heat treatment between 300 and 500°C.

Corrosion Resistance

Just as with the standard austenitic stainless steel Type 304, the corrosion resistance of NASNM15M shows no degradation even after strong cold working.

Evaluation of Pitting Corrosion Resistance

Solution-treated NASNM15M0.34V
60% cold-rolled NASNM15M0.31V

Test condition: 5% NaCl, 30°C

Atmospheric Corrosion Resistance in Salt Spray Test

Solution-treated NASNM15MNo rusting
60% cold-rolled NASNM15MNo rusting

Test condition: 5% NaCl, 35°C for 7 days

Workability

The hot and cold workability of NASNM15M is basically the same as that of standard austenitic stainless steels such as Type 304, Type 316, etc. However, the fact that this is a high strength material must be considered in both cold and hot working.

Heat Treatment

The heat treatment is similar to austenitic stainless steels. The typical heat treatment is as follows:
Solution heat treatment: 1030–1150°C; rapid cooling

Applications

Non-magnetic springs, Electronic components, Components in which a non-magnetic property is required.

 

 

 

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