PROPRIETARY WM O-1 Tool steels

Material group: Ferrous Alloys / Tool steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2018-05

Total number of updates: 1

Update History

This material has 28 properties — only a subset is shown here.

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PROPRIETARY WM O-1 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.90

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

0.50

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

1.20

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-33-7

Ellwood Specialty Steel, Product Data Sheets,

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PROPRIETARY WM O-1 Physical Properties

Temperature

0 - 30°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

0.27 — 0.3

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This material has 28 properties — only a subset is shown here.

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PROPRIETARY WM O-1 Heat Treatments

Forging: Heating for forging must be done slowly and uniformly. Soak through at 1800-1900°F, and reheat as often as necessary, stopping work when the temperature drops below 1600°F. After forging cool slowly in lime, mica, dry ashes or furnace. Should always be annealed after forging.
Annealing: Heat slowly to 1400-1450°F, hold until the entire mass is heated through, and cool slowly in the furnace (40°F per hour) to about 1000°F, after which the cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.
Strain relieving: When desirable to relieve the strains of machining, heat slowly to 1050-1250°F, allow to equalize, and then cool in still air.
Preheat for hardening: Warm slightly before charging into the preheat furnace, which should be operating at about 1100-1200°F. Hardening: After thorough preheating, transfer to the hardening furnace, operating from 1450-1500°F, depending on the degree of hardening desired for the application, and the size of the tool.
Quenching: Quench in warm oil and allow to cool in the oil until a temperature of 125-150°F has been reached, or to where the tool can be held in the bare hand, and temper immediately. Care should be taken to prevent an accumulation of water in the oil quenching tank.
Tempering: It is generally tempered in the range of 300-600°F. The following curve may be used as a guide to the hardness that may be expected after tampering.

PROPRIETARY WM O-1 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Rockwell Hardness (HR)

51.5 — 65.5

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1Cross References

6Composition
11Mechanical Properties
8Physical Properties
1Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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