ASTM B160 Ni200 Nickel Wire Description
Product Introduction
ASTM B160 Ni200 nickel wire (UNS N02200) is a commercially pure nickel rod and wire product conforming to ASTM B160. Nickel content ≥99.0% (plus cobalt) with FCC crystal structure, offering excellent caustic alkali corrosion resistance, electrical conductivity, and thermal conductivity. ASTM B160 governs chemical composition, mechanical properties, and dimensional tolerances for nickel bar and wire used in chemical processing, electronics, and food industries. Available from φ0.1 mm to φ6.5 mm, customizable up to φ10.0 mm, as straight wire or coil.
Technical Specifications
1. Basic Information
Product Name | ASTM B160 Ni200 Nickel Wire |
Grade Equivalents | ASTM B160/UNS N02200/Ni ≥99.0% |
Standards | ASTM B160 |
Supply Forms | Straight wire, Coil wire |
Surface Conditions | Pickled, Bright finish |
Diameter Range | φ0.1-φ6.5 mm; customizable up to φ10.0 mm |
Straightness | ≤2/1000 |
2. Chemical Compositions
Ni+Co | Fe | Mn | Si | Cu | C | S |
≥99.0% | ≤0.40% | ≤0.35% | ≤0.35% | ≤0.25% | ≤0.15% | ≤0.01% |
3. Mechanical Properties
Tempers | UTS (MPa) | YS (MPa) | Elongations (%) |
Annealed | 345-550 | 80-195 | ≥40 |
4. Physical Properties
Properties | Values |
Density | 8.89 g/cm³ |
Melting Point | 1435-1446°C |
Coefficient of Thermal Expansion | 13.3×10⁻⁶/°C |
Thermal Conductivity | ≈70 W/(m·K) |
Electrical Resistivity | ≈0.095 μΩ·m (20°C) |
Magnetic Properties | Ferromagnetic (Curie point≈358°C) |
Max. Service Temperature | ≤315°C in oxidizing atmospheres |
Features and Advantages
- ASTM B160 certified: Conforms to ASTM nickel and nickel alloy rod/wire specification with proven quality system.
- Superir caustic alkali resistance: Virtually immune to corrosion in hot concentrated NaOH and KOH -far exceeding stainless steel.
- High electrical and thermal conductivity: Electrical resistivity ≈ 0.095 μΩ·m, thermal conductivity≈70 W/(m·K).
- Excellent ductility: Elongation ≥40% annealed; easily drawn to ultra-fine wire diameters.
- High purity: Nickel ≥99.0% with consistent batch composition and reproducible performance.
- Broad temperature window: 1440°C melting point; reliable continuous service up to 315°C.
Performance Solutions
A. Problem: Stainless steel suffers caustic embrittlement and stress corrosion cracking in hot concentrated alkalis, creating significant safety risks.
Solution: ASTM B160 Ni200 is virtually immune to corrosion in NaOH and KOH. A reliable material choice for caustic concentration and evaporation systems.
B. Problem: Copper and copper alloys suffer pitting and dealloying corrosion in chloride environments, resulting in short service life.
Solution: ASTM B160 Ni200 remains stable in neutral chloride and sulfate solutions. Corrosion rates are extremely low.
C. Problem: Iron-based materials cause metal contamination in food processing media, compromising product purity.
Solution: ASTM B160 Ni200 resists food acids and cleaning solutions. Compliant with FDA food-contact requirements.
D. Problem: Conventional metal wire oxidizes and loses conductivity under high-temperature, high-humidity conditions.
Solution: ASTM B160 Ni200 has good oxidation resistance and stable conductivity. Excellent for electronic component leads and connectors.
Applications
A. Used in caustic evaporator tube bundles, diaphragm cell components, caustic piping, and storage tank components. Virtually immune to corrosion in hot, concentrated NaOH.
B. Used in resistor leads, semiconductor bonding wires, capacitor leads, and battery tabs. High conductivity and oxidation resistance. ASTM B160 electronic-grade compliant.
C. Used in food-grade piping, heat exchangers, filter screens, and conveyor belt components. FDA food-contact compliant. No metal contamination.
D. Used in viscose rayon spinnerets, filter screens, and spinning components. Resists spin-bath corrosion with clean surface. No fiber contamination.
E. Used in fluorine-process piping, evaporators, and heat exchanger components. Resists anhydrous HF and moderate-concentration hydrofluoric acid. ASTM B160 certified.