PROPRIETARY CarTech No. 879 Tool steels
Material group:
Ferrous Alloys / Tool steels
Country / Standard:
PROPRIETARY
Data updates
Latest Update: 2019-09
Total number of updates: 1
Update History
This material has 113 properties — only a subset is shown here.
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PROPRIETARY CarTech No. 879 Chemical Composition
CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.40
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Co
VALUE
4.25
UNIT
%
CAS NUMBER
7440-48-4
CRITERIA
Cr
VALUE
4.25
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Fe
VALUE
val1
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UNIT
%
CAS NUMBER
7439-89-6
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2
CRITERIA
W
VALUE
val1
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UNIT
%
CAS NUMBER
7440-33-7
Carpenter Technology Corporation, Product Data Sheets,
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PROPRIETARY CarTech No. 879 Physical Properties
Temperature
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 113 properties — only a subset is shown here.
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PROPRIETARY CarTech No. 879 Heat Treatments
- Decarburization: Steel displays medium resistance to decarburization during thermal processing. Precautions must be taken to control this condition. Modern furnaces are available which provide environments designed to minimize decarburization.
Normalizing: Do not normalize.
Annealing: Anneal in a controlled atmosphere furnace or with a neutral packing compound. Heat slowly to 871-889°C (1600-1650°F), and hold until the entire mass is heated through. Cool slowly in the furnace 22°C (40°F) per hour to 593°C (1100°F), then air cool.
Hardening: Preheat slowly and uniformly to 816-843°C (1500-1550°F). Then heat more rapidly to an austenitizing temperature of 1093-1204°C (2000-2200°F). The lower end of the temperature range is only used when a relatively low final hardness is desired. Hold for 2-5 minutes at temperature and harden by cooling in air or oil. A controlled atmosphere or vacuum furnace should be used to minimize decarburization and oxidation.
Tempering: As soon as the hardened steel reaches 52-66°C (125-150°F), temper to the hardness desired as suggested in the chart on the following page. Double tempering is recommended to improve toughness and reduce heat cracking. Time at temperature should be no less than one and a half hours or one hour per inch of section.
Forging: Preforge heating must be slow and uniform. Soak through at 1038-1093°C (1900-2000°F) and reheat when necessary, stopping work when the temperature falls below 889°C (1650°F). After forging, cool slowly in furnace, mica, lime or dry ashes. Anneal as soon as possible after forging and cooling.
PROPRIETARY CarTech No. 879 Mechanical Properties
Temperature
Brinell Hardness (HB)
207 — 241
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Rockwell Hardness (HR)
val1
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Impact Energy
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PROPRIETARY CarTech No. 879 International Equivalent Materials
Showing 6 of 7 results.
MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STANDARD
ISO
COUNTRY / PRODUCER
International
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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- 7Cross References
- 9Composition
- 85Mechanical Properties
- 9Physical Properties
- 1Heat Treatment
- -Metallography
- -Machinability
- -Stress-Strain
- -Formability
- -Fatigue
- -Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 2Total Suppliers