PROPRIETARY Carpenter No. 158 Alloy Tool steels

Material group: Ferrous Alloys / Tool steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2022-02

Total number of updates: 2

Update History

2016-01

This material has 45 properties — only a subset is shown here.

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PROPRIETARY Carpenter No. 158 Alloy Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.10

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

≤ 1.50

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

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

Carpenter Technology Corporation, Product Data Sheets,

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PROPRIETARY Carpenter No. 158 Alloy Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Density

7.72 — 8.027 kg/dm³

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Poisson Coefficient

val1

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Shear Modulus

81 GPa

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Coefficient of Thermal Expansion (CTE)

val1 10^-6/°C

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This material has 45 properties — only a subset is shown here.

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PROPRIETARY Carpenter No. 158 Alloy Heat Treatments

Treatment A: carburize at 871/899ºC (1600/1650ºF), pack cool or air cool. For hardening, heat the parts to 816°C (1500°F), quench in oil. Reheat parts to 774°C (1425°F), quench in oil. Temper at 93/149ºC (200/300ºF).
Treatment B: carburize at 843/871ºC (1550/1600ºF), air cool or pack cool. Heat the parts at 778°C (1450°F), quench in oil. Temper at 93/149ºC (200/300ºF).
Treatment C: parts may be carburized at 843/871ºC (1550/1600ºF) and quenched directly in oil. This should be followed by tempering at 93/149ºC (200/300ºF).
Normalizing: heat to 899/954ºC (1650/1750ºF), cool in air.
Annealing: heat to 677/693ºC (1250/1280ºF), then cool slowly. To secure maximum softness, do not exceed 693°C (1280°F).
Carburizing: Cyanide Treatment - performed in a cyanide salt bath at approximately 788°C (1450°F). Pack and Gas Carburizing - carburize between 816/871ºC (1500/1600ºF) for long enough to secure the desired case depth. Eight hours at 871ºC (1600ºF) will produce a case depth of between 0.76 and 1.02 mm (0.030 and 0.040").
Hardening: harden from a temperature of 774/816ºC (1425/1500ºF) followed by oil quenching. Small sections may be fully hardened by air quenching.
Cold Treatment: it is desirable to cold treat by lowering the temperature to under -73°C (-100°F) and holding for one hour, followed by allowing the steel to come back naturally to room temperature.
Stress Relieving: should be carried out by heating to 593ºC (1100ºF), holding for one hour at heat, followed by air cooling.

PROPRIETARY Carpenter No. 158 Alloy Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

1138 — 1172 MPa

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Brinell Hardness (HB)

352 — 363

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Elongation, A

14 — 17 %

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Reduction of Area

val1 %

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Rockwell Hardness (HR)

val1

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Yield Strength, Rp0.2

val1 MPa

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Impact Energy

val1 J

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PROPRIETARY Carpenter No. 158 Alloy International Equivalent Materials

Showing 4 of 4 results.

MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

T51606

STANDARD

UNS

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Official

MATERIAL

P-6

STANDARD

AISI

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

MATERIAL

A 681 Type P6

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

MATERIAL

STANDARD

PROPRIETARY

COUNTRY / PRODUCER

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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4Cross References

6Composition
21Mechanical Properties
7Physical Properties
1Heat Treatment
-Metallography
-Machinability

3Stress-Strain
-Formability
-Fatigue
-Fracture
-Creep

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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