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STELLITE Alloy 6

ELEVATED TEMPERATURE PROPERTIES

Temperature 0C 20 100 200 300 400 500 600 700 800 900

Hardness DPH 410 390 356 345 334 301 235 155 138 95

Expans. coefficient 200

to 13.9 14.5 15.0 15.3 15.8 16.3

Typical melting range 1260 - 13570C

STELLITE ALLOY 6 is the most widely used alloy in the Co-Cr-W-C family of alloys. It has an

excellent resistance to many forms of wear and corrosion over a wide range in temperature.

Stellite Alloy 6 has an outstanding resistance to seizing or galling as well as cavitation erosion.

Retains its hardness at high temperature and resists oxidation to 1095 0C. Combines these

properties along with the highest strength and ductility for this wear resistant family of alloys.

CHEMICAL ANALYSIS (%)

C Si Fe Ni Cr W Co B Others

1.2 1.0 2.0 2.0 29.0 4.5 Bal

MECHANICAL PROPERTIES

Hardness : 37 - 50 HRC

Tensile Strength : 121 KSI

Yield Strength : Near UTS KSI

Elongation : < 1 %

Modulus of Elasticity : 30,400 KSI

FINISHING

The most machinable grade is this family of alloys and can be satisfactorily machined with

carbide tip tools. Stress relieving before machining is recommended.

APPLICATIONS

Used extensively to combat galling in valve trim. Protects against erosion on turbine blades and

valve parts, also used for half and full sleeves and bushings as well as knives, scrappers, pump

sleeves and liners. Environments which have a combination of adhesive, abrasive or erosive

wear along with corrosion or temperature make ideal applications.

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WEAR

Stellite alloy 6 has excellent resistance to thermal shock and resists most types of mechanical

wear especially when in combination with corrosion and/or temperature. When self-mated, it

has a very low coefficient of friction of .12 and exceptional resistance to galling. It has cavitation-

erosion resistance ten times that of 304 stainless steel. The material is also ten times moreresistant than 1020 or 304 SS in low stress abrasion and at least twice as resistant as hardened

1090 steel (Rc 55). Stellite alloy 6 is used to protect bearing surfaces in non-lubrication conditions

due to its resistance to metal-to-metal wear.

CORROSION

Stellite alloy 6 has high resistance to a variety of corrosive media and excellent oxidizing

resistance to about 1095 0C. The material is inferior to most nickel base alloys but is resistant

to oxidation acids such as acetic, formic, phosphoric and low concentration sulphuric. The

alloy is not recommended for strongly reducing acids such as hydrochloric. The material behaves

similar to 316SS and the extent of resistance will vary with acid concentration, temperatureand contaminants making actual field tests the best method for determining suitability.

HEAT TREATMENT

This material does not respond to thermal treatments but may be stress relieved for machining

by holding at 900 0C for four hours and slow cool.

The above data have been obtained from experiment and trial results; they are considered to be

accurate but do, in no way, constitute a specification

STELLITE is a trade mark of Deloro Stellite Inc.

FCT 04/11/0/05-97/2000

ISO-9002 CERTIFICATED FIRM

ADOR FONTECH LIMITED

Belview 7 Haudin Road Bangalore - 560 042Tel: 080 5596045 5596073 5583157 Fax: 080 5597085 5594601e-mail :customerservice@adorfon.com

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