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	PRODUCT DATA of Incoloy 901

Material

Incoloy 901

General Information

A nickel-iron-chromium alloy containing titanium and aluminum for precipitation hardening and molybdenum for solid-solution strengthening. The alloy has high yield strength and creep resistance at temperatures to about 1110°F (600°C). A substantial iron content enables the alloy to combine high strength with good forging characteristics. Used in gas turbines for discs and shafts

	EXPERIENCE IN PRACTICE

Development Status

Commercial Product

	PHYSICAL PROPERTIES

Specific Gravity

8.14

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

1.12e-6 ohm.m

	THERMAL PROPERTIES

Thermal Expansion Coefficient

13.5 ustrain/C

Specific Heat

0.431 J/g.K

Melting Range

1280 to 1345 C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status

No specific corrosion protection required

Atmospheric Corrosion

Has good corrosion resistance to the atmospheres normally found in jet engine operations. It has slightly lower scaling resistance than such alloy as Types 309 and 310 stainless steel.

Stress Corrosion Status

High Resistance to SCC: Table 1 Data Quality: Design Data

Bimetallic Corrosion

Can be connected without any restriction to: 400 series Stainless steel Can be connected in a non-controlled environment to the above and 300 series stainless steel, Ti and Ti-alloys, Cr, Cu, brasses, Cu-Ni, Al-bronzes, Si-bronzes, Can be connected in a clean room environment to above and Ag, SnPb alloys, Sn, Pb, low C steel, Al-Cu alloys, Cd, Au Needs specific measures: All others Test:ECSS-Q-ST-70C Rev.1 Table 5.1 Data Quality: Design Data

Welding

Can be welded by the inert-gas-arc method. It is difficult to weld. All welding should be done in the solution treated condition