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HAYNES 188 Alloy WIre

Material: Cobalt-Nickel-Chromium-Tungsten Alloy

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Features

Material:	Cobalt-Nickel-Chromium-Tungsten Alloy
Appearance:	Silvery metallic solid
Standard:	UNS R30188, AMS 5772, AMS 5801 (Welding Wire)
Type:	Shaped, Flat, Square, Round, Fine Wire, Plated and Un-plated
Size:	Customized

Haynes 188 Alloy Wire Description

Haynes 188 alloy is a cobalt-nickel-chromium-tungsten alloy with excellent high temperature tensile strength, sulfidation and oxidation resistance up to 1095°C (2000°F) for long term exposures. It is not age hardenable but may be cold worked to achieve higher tensile and yield strength. It responds well to conventional forming and welding techniques.

Mechanical Properties

ANNEALED (Typical)

● Ultimate Tensile Strength: 130 KSI min (896 MPa min)

● Yield Strength (0.2% offset): 60 KSI min (414 MPa min)

● Elongation: 45% min

Hot Tensile 1200°F (Typical)

● Ultimate Tensile Strength: 90 KSI min (620 MPa min)

● Yield Strength (0.2% offset): 35 KSI min (243 MPa min)

● Elongation: Gauges up to 0.020 inches: 35% min; Gauges over 0.020 inches: 20% min

Chemical Composition

Element	Percent by Weight
Carbon	0.05 - 0.15%
Manganese	1.25% max
Silicon	0.20 - 0.50%
Chromium	20.0 - 24.0%
Nickel	20.0 - 24.0%
Tungsten	13.0 - 16.0%
Lanthanum	0.02 - 0.12%
Boron	0.015% max
Iron	3% max
Cobalt	Balance

Features

● Good fabricability and weldability

● Retains excellent strength and ductility at elevated temperatures

● Good sulfidation resistance

● Excellent metallurgical stability at high temperatures

Physical Properties

Density	0.330 lb/in³ 9.14 g/cm³
Melting Range	2375-2425 °F 1300-1330 °C
Specific Heat	0.097 at 70 °F, Bru/lb °F 405 at 21 °C, J/kg °C
Permeability	1.0007 at 200 oersted
Coefficient of Expansion	6.6 0-200 °F, 10¯⁶ in/in•°F
Thermal Conductivity	84 Btu•in/ft²•h•°F W/wm•°C
Electrical Resistivity	613 ohm•circ mil/ft 102.0 microhm-cm