PROPRIETARY CarTech M-50 High Speed Steel Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2020-10

Total number of updates: 2

Update History

2019-09

This material has 98 properties — only a subset is shown here.

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PROPRIETARY CarTech M-50 High Speed 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 High Speed 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

7.67 — 7.972 kg/dm³

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Poisson Coefficient

val1

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Service Temperature

≤ 371 °C

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This material has 98 properties — only a subset is shown here.

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PROPRIETARY CarTech M-50 High Speed Steel Heat Treatments

Decarburization: Must be heat treated from a relatively high temperature, it must be protected from changes in surface chemistry during the hardening operation. This is best done by treating from neutral salt baths or from controlled atmosphere furnaces. A dew point of -9.4 to -6.7°C (15 to 20°F) is usually satisfactory to prevent decarburization during hardening.

Normalizing: Normalizing is not recommended.

Annealing: Heat uniformly to 843-899°C (1550-1650°F), 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 furnace is black. The furnace may then be turned off and allowed to cool naturally.

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) and hold for one hour. 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.

Stress relieving: To relieve machining stresses for greater accuracy in hardening - first, rough machine, then anneal below the critical at 649-977°C (1200-1250°F) a minimum of one hour at temperature and cool slowly - then finish machine.

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.

Forging: Preheat to 760-816°C (1400-1500°F) and allow pieces to equalize, then increase the furnace temperature to 1066-1121°C (1950-2050°F). Do not forge below 982°C (1800°F). Reheat as often as required to maintain forging temperature. After forging pieces may be cooled in the furnace or in lime or ashes. When cooled, the forgings should be annealed.

PROPRIETARY CarTech M-50 High Speed Steel Mechanical Properties

Temperature

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

PROPERTY / VALUE

Tensile Strength

2800 MPa

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Brinell Hardness (HB)

val1

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Elongation, A

val1 %

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Rockwell Hardness (HR)

val1

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Yield Strength, Rp0.2

val1 MPa

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Reduction of Area

val1 %

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PROPRIETARY CarTech M-50 High Speed Steel International Equivalent Materials

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MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

CarTech M-50 Bearing 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
70Mechanical Properties
10Physical Properties
1Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

4Total Suppliers