PROPRIETARY CarTech M-50 Bearing Steel Tool steels

Material group: Ferrous Alloys / Tool steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2025-07

Total number of updates: 3

Update History

2018-04 2016-01

This material has 64 properties — only a subset is shown here.

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PROPRIETARY CarTech M-50 Bearing Steel Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.80

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

4.00

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

Balance

UNIT

CAS NUMBER

7439-89-6

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

Carpenter Technology Corporation, Product Data Sheets,

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PROPRIETARY CarTech M-50 Bearing Steel Physical Properties

Temperature

≤ 0°C 0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Density

7.72 — 8 kg/dm³

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Poisson Coefficient

val1

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Service Temperature

≤ 371 °C

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This material has 64 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

PROPRIETARY CarTech M-50 Bearing Steel Heat Treatments

Normalizing: Normalizing is not recommended.
Annealing: Heat uniformly to 843/899°C (1550/1650°F), hold at heat for one hour per inch of thickness, then cool slowly in the furnace at a rate of no more than 11°C (20°F) per hour. The slow cooling rate should be maintained until the parts are black. Because it is subject to decarburization and therefore must be protected either by packing in suitable containers with clean cast-iron borings or by annealing in a controlled atmosphere furnace.
Hardening: The following is a specific recommendation for heat treating to produce optimum stability: Preheat at 816°C (1500°F) and equalize, then transfer to superheated furnace at 1100°C (2010°F). Superheat only long enough to allow the piece to reach superheated furnace temperature and follow immediately by quenching to room temperature. Following quenching, cool the part to approximately -73°C (-100°F). Following cooling, double temper at 538°C (1000°F). This should produce a hardness of Rockwell C 62-64 and optimum stability so far as size change during service is concerned. An additional general hardening recommendation would be to preheat to 816/871°C (1500/1600°F), followed by superheating from 1093/1121°C (2000/2050°F). The parts may be oil, air, or high temperature salt quenched.
Tempering: Temper immediately after the pieces have been cooled in the quench. The normal tempering range is from 525/552°C (975/1025°F). Double tempering is desirable with two hours at heat being the recommended time for each temper. The pieces should be cooled back to room temperature between tempers.

PROPRIETARY CarTech M-50 Bearing Steel Mechanical Properties

Temperature

0 - 30°C 30 - 100°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Elongation, A

val1 %

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Reduction of Area

val1 %

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Rockwell Hardness (HR)

val1

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PROPRIETARY CarTech M-50 Bearing Steel International Equivalent Materials

Showing 2 of 3 results.

MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

CarTech M-50 High Speed Steel

STANDARD

PROPRIETARY

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

Composition 100%

MATERIAL

T11350

STANDARD

UNS

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.

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3Cross References

10Composition
34Mechanical Properties
10Physical Properties
2Heat Treatment
-Metallography
-Machinability

-Stress-Strain
-Formability
-Fatigue
-Fracture
-Creep

-Joints
-Coatings
-Dimensions
1Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

4Total Suppliers