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Rulon Bearings

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Carpenter Four Star High Speed Steel Red-Wear® (AISI M4)
Categories: Metal; Ferrous Metal; Carbon Steel; High Carbon Steel; Tool Steel

Material Notes: Carpenter Four Star, a molybdenum-tungsten high speed tool steel possessing high carbon and vanadium contents, provides a very high degree of wear resistance coupled with high strength.

Applications: Lathe tools, Planer tools, Drills, Taps, Reamers, Broaches, Milling cutters, Form cutters, Thread chasers, Hobs, Counterbores, Inserts-heading dies

Information provided by Carpenter Technology Corporation.

Key Words: UNS T11304
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Physical PropertiesOriginal ValueComments
Density 7.97 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell C 59 - 61Tempered at 1200°F
 64 - 65As hardened
Izod Impact Unnotched 47.0 Jwhen tempered at 900°F
Abrasion 20.2loss in mm3, tested at 1000°F; ASTM G65
 28.4loss in mm3, tested at 1175°F; ASTM G65
 
Component Elements PropertiesOriginal ValueComments
Carbon, C 1.3 %
Chromium, Cr 4.5 %
Iron, Fe 79.6 %As Balance
Manganese, Mn 0.30 %
Molybdenum, Mo 4.5 %
Silicon, Si 0.30 %
Tungsten, W 5.5 %
Vanadium, V 4.0 %

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NCARN23 / 15862

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