NAS NM17 Cr-Mn-N Steel Round Bar

Product Description

NAS NM17 (manufactured by Nippon Yakin Kogyo Co., Ltd.) is a high-performance, non-magnetic (amagnetic) soft austenitic stainless steel.

Unlike standard high-strength non-magnetic alloys that focus heavily on high yield strength via severe cold working, NAS NM17 is specifically formulated as a soft, highly formable non-magnetic alloy. By balancing a high manganese content with a robust addition of nickel, chromium, and nitrogen, it provides excellent ductility and deep-drawing capabilities while maintaining an incredibly stable non-magnetic footprint even after aggressive cold deformation.

Chemical Composition (Mass Weight %)

The dual utilization of both Manganese ($16.00–17.00\%$) and Nickel ($7.00–8.00\%$) creates an incredibly stable austenitic matrix, preventing the formation of strain-induced martensite or delta ferrite during fabrication.

Key Technical & Magnetic Attributes

• Absolute Non-Magnetism: In its supplied solution-annealed state, it has zero magnetic footprint ($\mu \approx 1.00$). Most importantly, because of its rich Ni + Mn composition, it remains strictly non-magnetic after bending, deep drawing, or structural machining.

• Excellent Formability (Soft Condition): With an annealed hardness threshold of $\le 180 \text{ HV}$, NAS NM17 behaves similarly to conventional soft austenitic sheets and bars. It allows for the fabrication of highly intricate shapes, tight radius bends, or stamped components without the immediate cracking risks seen in high-strength amagnetic grades.

• Corrosion Resistance: The $17\%$ Chromium baseline provides reliable resistance to atmospheric rust, urban pollution, moisture, and mild organic chemical contact, matching or exceeding standard 304-grade stainless properties under nominal conditions.

Mechanical Properties (At Room Temperature)

Physical Properties

• Density: $7.80 \text{ g/cm}^3$

• Melting Point: 1340°C – 1400°C

• Specific Heat: $500 \text{ J/kg}\cdot\text{K}$

• Electrical Resistivity: $75 \mu\Omega\cdot\text{cm}$

• Thermal Conductivity: $14.5 \text{ W/m}\cdot\text{K}$

Processing & Heat Treatment

• Solution Annealing: Typically heated between 1050°C and 1150°C, immediately followed by rapid cooling (water quenching or forced air). This completely dissolves any alloyed carbides or nitrides back into the solid matrix to maintain its soft, amagnetic, and highly corrosion-resistant profile.

• Machinability: Due to its soft baseline state, it generates fewer tooling friction peaks than stiffer high-nitrogen variants (like P2000). Standard sharp carbide tooling configurations with positive cutting feeds work efficiently.

Primary Applications for Round Bars

NAS NM17 round bars and raw stocks are heavily preferred for complex, intricate structural parts in high-tech consumer electronics and precision signal hardware:

• Electronic Communication Equipment: Structural components for mobile phones, high-end camera lens modules, and micro-actuators that require no magnetic field distortion.

• Signal & Diagnostics: Internals for signal generators, radar equipment housing components, and satellite navigation hardware.

• Consumer Luxury & Apparel: Precision non-magnetic watch parts, luxury wearable frames, and electronic component pins.

• Complex Shielding Assemblies: Intricately machined brackets, guide pins, and hardware operating near sensitive electronic tracking arrays.