Alloy 200 (UNS N02200)
Description
Nickel 200 is a wrought commercially pure nickel product. The alloy provides highly ductile mechanical properties across a wide temperature range and good corrosion resistance in neutral to moderately reducing environments. In the annealed condition, the alloy possesses the approximate strength of mild steel.
The nickel alloys are readily fabricated by standard fabrication practices. The materials are covered by a variety of specifications and are assigned maximum allowable stresses in the ASME Boiler and Pressure Vessel Code. Nickel 200 is ferromagnetic and provides high thermal and electrical conductivity in comparison to nickel base alloys, stainless and low alloy steels.
Because long term exposures of Nickel 200 in the 800 to 1200°F range can result in precipitation of a carbon containing phase and loss of ductility, the alloy is not recommended for service above 600°F.
Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM B160*
| Carbon | 0.10 | Manganese | 0.50 |
| Nickel | 20.00-23.00 | Silicon | 0.015 |
| Iron | 58.00 min | Sulfur | 0.015 |
*Maximum, unless range is indicated
Physical Properties
Physical properties for Nickel 200
| Density, lb/in3 | 0.322 |
| Modulus of Elasticity, psi | 30.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 7.4 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 38.8 |
| Specific Heat, Btu/lb ˚F | 0.106 |
| Electrical Resistivity, Microhm-in | 21.6 |
Mechanical Properties
Mechanical property requirements for annealed bar product as specified in ASTM B160
| Yield Strength, min. (ksi) | 15 |
| Tensile Strength, min. (ksi) | 55 |
| Elongation, min. (%) | 40 |
Standards
Typical standards for Nickel 200
| ASTM B160 |
| ASME SB160 |