MatWeb - Material Property Data Advertise with MatWeb!     Register Now
Data sheets for over 180,000 metals, plastics, ceramics, and composites.
MatWeb - Material Property Data HOME  •   SEARCH  •   TOOLS  •   SUPPLIERS  •   FOLDERS  •   ABOUT US  •   FAQ  •   LOG IN    
Recently Viewed Materials (most recent at top)  

Login to see your most recently viewed materials here.

Or if you don't have an account with us yet, then click here to register.

  Searches:   Advanced  | Category  | Property  | Metals  | Trade Name  | Manufacturer  | Recently Viewed Materials
  

Rulon Bearings

Crucible Steel REX® M42 High Speed Steel, AISI M42
Categories: Metal; Ferrous Metal; Tool Steel

Material Notes: REX M42 is a super cobalt high speed steel which may be heat treated to HRC 68. This makes REX M42 outstanding for special purpose cutting tools, with requirements beyond the capability of general purpose high speed steels.

Information provided by Crucible Industries

Key Words: AISI M42
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 8.00 g/cc0.289 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Brinell 235 - 255235 - 255
Hardness, Rockwell C 6666oil quenched from 2050°F
 50
@Tempering Temp. 621 °C
50
@Tempering Temp. 1150 °F
oil quenched from 2050°F then tempered
 54
@Tempering Temp. 593 °C
54
@Tempering Temp. 1100 °F
oil quenched from 2050°F then tempered
 60
@Tempering Temp. 566 °C
60
@Tempering Temp. 1050 °F
oil quenched from 2050°F then tempered
 63
@Tempering Temp. 551.7 °C
63
@Tempering Temp. 1025 °F
oil quenched from 2050°F then tempered
 64.5
@Tempering Temp. 538 °C
64.5
@Tempering Temp. 1000 °F
oil quenched from 2050°F then tempered
Tensile Strength, Ultimate 2560 MPa372000 psihardened at 2175°F
 3080 MPa446000 psihardened at 2100°F
Modulus of Elasticity 207 GPa30000 ksi
Charpy Impact 6.78 J5.00 ft-lbhardened at 2175°F; C-notch
 9.49 J7.00 ft-lbhardened at 2100°F; C-notch
 
Processing PropertiesMetricEnglishComments
Processing Temperature 849 °C1560 °FCritical Thermal Treatment Temperature
 
Component Elements PropertiesMetricEnglishComments
Carbon, C 1.08 %1.08 %
Chromium, Cr 3.75 %3.75 %
Cobalt, Co 8.0 %8.0 %
Iron, Fe 74 %74 %as balance
Manganese, Mn 0.30 %0.30 %
Molybdenum, Mo 9.5 %9.5 %
Silicon, Si 0.30 %0.30 %
Sulfur, S 0.030 %0.030 %
Tungsten, W 1.6 %1.6 %
Vanadium, V 1.15 %1.15 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

Users viewing this material also viewed the following:
AISI Type M42 Molybdenum High Speed Tool Steel (UNS T11342)
Carpenter Micro-Melt® M-42 Alloy (AISI M42)
Bohler-Uddeholm BÖHLER S500(m42) High Speed Steel
Clifton Steel Tensalloy™ AR400 Abrasion-Resistant Steel Wear Plate, 0.188 - 0.25 in. thickness
Crucible Steel CPM® 10V® (AISI A11) Tool Steel

NCRUC928 / 160379

Aluminum Castings

Please read our License Agreement regarding materials data and our Privacy Policy. Questions or comments about MatWeb? Please contact us at info@matweb.com. We appreciate your input.

The contents of this web site, the MatWeb logo, and "MatWeb" are Copyright 1996-2025 by MatWeb, LLC. MatWeb is intended for personal, non-commercial use. The contents, results, and technical data from this site may not be reproduced either electronically, photographically or substantively without permission from MatWeb, LLC.