PROPRIETARY CarTech CTS 204P Alloy Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2019-07

Total number of updates: 1

Update History

This material has 68 properties — only a subset is shown here.

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PROPRIETARY CarTech CTS 204P Alloy Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

1.90

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

20.00

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

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-33-7

Carpenter Technology Corporation, Product Data Sheets,

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PROPRIETARY CarTech CTS 204P Alloy Physical Properties

Temperature

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

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Thermal Conductivity

14 W/(m∙°C)

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Density

7.61 — 8.1 kg/dm³

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Poisson Coefficient

val1

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This material has 68 properties — only a subset is shown here.

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PROPRIETARY CarTech CTS 204P Alloy Heat Treatments

Alloy is subject to decarburization during thermal processing. Taking of proper precautions should insure that there is no decarburization during heat treatment. Salt bath, controlled atmosphere, or vacuum furnaces are acceptable for heat treating this alloy.

Annealing: Heat slowly at a rate not exceeding 222°C/h (400°F/h) to 1016-1038°C (1860-1900°F) and hold at temperature for the longer of 4h minimum or 1 h/in. of maximum thickness. Following soaking, cool slowly in the furnace at a rate not to exceed 17°C/h (30°F/h) to 538°C (1000°F), after which the part may be air-cooled to room temperature.

Hardening: Preheat at 760-788°C (1400-1450°F) and equalize. After preheating, rapidly heat at 1066-1149°C (1950-2100°F) when using salt or atmosphere controlled furnaces and 1121-1177°C (2050-2150°F) when using vacuum furnaces. Austenitizing at the low end of this temperature range will maximize toughness at the expense of wear resistance, while the reverse will occur when austenitizing at the high end of this range. Soak at the austenitizing temperature for 30 minutes and then quench.

Quenching: Quenching can entail the use of pressurized gas in a vacuum furnace, warm oil or neutral salt. When treating in a vacuum furnace, the inert pressurized gas should be a minimum of 4 bars. A quench rate of approximately 222°C/min (400°F/min) to a temperature < 538°C (1000°F) is necessary to insure the attainment of optimum properties.

When quenching using warm oil, quench until the part is black, about 482°C (900°F), then continue cooling in still air to room temperature.

When quenching using neutral salt, quench the tool into a salt bath maintained at 538°C (1000°F), equalize the part, then continue cooling in still air to room temperature.

When quenching using inert pressurized gas in a vacuum furnace, the time in the gas-quenching medium will depend on the size of the relevant work piece and furnace parameters.

Large complex parts should be preheated using a multi-step process that would entail equalizing jus below the Ac₁, heating slowly [14°C/h (25°F/h)] through the Ac₁ - Ac₃ range, equalizing just above the Ac₃ and then rapidly heating to the austenitizing temperature.

Cold treatment: When austenitizing at temperatures > 1149°C (2100°F), a cryogenic or refrigeration treatment is suggested after quenching to reduce the presence of retained austenite. After quenching from the austenitizing temperature to 51-66°C (125-150°F) cool the part to -73°C (-100°F) and hold at this temperature for 1 hour. Remove the part from the cooling medium and allow it to warm to room temperature in still air.

Stress relieving: Heat slowly at 649-704°C (1200-1300°F), hold for a minimum of 2 hours at temperature, cool slowly and uniformly to about 427°C (800°F), then cool in still air.

Tempering: Tools should be tempered immediately after completion of quenching or after completion of quenching and the cryogenic treatment. The typical tempering range for this alloy is 204-399°C (400-750°F). Tools should be soaked at temperature for the greater of 1h per 25.4 mm of thickness or 2 hours minimum, and then cooled to room temperature in still air. Parts should never be tempered between 427-583°C (800-1100°F) since both the corrosion resistance and toughness will be severely degraded to excessive carbide precipitation.

PROPRIETARY CarTech CTS 204P Alloy Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Brinell Hardness (HB)

≤ 280

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Rockwell Hardness (HR)

≤ 62

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PROPRIETARY CarTech CTS 204P Alloy International Equivalent Materials

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MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

CarTech Micro-Melt 20-4 Alloy

STANDARD

PROPRIETARY

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

Composition 100%

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

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2Cross References

8Composition
44Mechanical Properties
11Physical Properties
1Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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