PROPRIETARY ATI 17-7 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country / Standard: PROPRIETARY

Indicative price:

Data updates

Latest Update: 2021-10

Total number of updates: 2

Update History

2016-12

This material has 154 properties — only a subset is shown here.

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PROPRIETARY ATI 17-7 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.75 – 1.50

UNIT

CAS NUMBER

7429-90-5

CRITERIA

VALUE

≤ 0.09

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

16.00 – 18.00

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

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

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

Allegheny Technologies Incorporated, Product Data Sheets,

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PROPRIETARY ATI 17-7 Physical Properties

Temperature

0 - 30°C 30 - 100°C 100 - 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Electrical Resistivity

0.8 Ω∙mm²/m

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Density

val1 kg/dm³

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Electrical Conductivity

val1 S/m

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Shear Modulus

val1 GPa

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Poisson Coefficient

val1

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This material has 154 properties — only a subset is shown here.

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PROPRIETARY ATI 17-7 Heat Treatments

To develop the high precipitation hardened strength of the alloy by heat treatment, starting from Condition A, heat treatments are done to accomplish two necessary steps. The first is a heat treatment which allows the relatively stable austenite of Condition A to transform to martensite (Austenite Conditioning and Transformation). The second is a precipitation hardening heat treatment to further strengthen the material. The austenite is easier to transform to martensite using a lower temperature heat treatment. For this reason, Condition TH 1050 uses a 760°C (1400°F) heat treatment to produce a martensite transformation around room temperature, and this is followed by a precipitation hardening heat treatment at 565°C (1050°F). If Condition RH 950 is desired, the austenite conditioning heat treatment is conducted at 955°C (1750°F). In this case, the martensite transformation is not complete until the material is held for some time at -73°C (-100°F). When the transformation is complete, the material is precipitation hardened at 510°C (950°F) to Condition RH 950.
When alloy with an austenitic structure is cold worked by substantial deformation, a transformation to martensitic structure results from the deformation. In this condition, Condition C, the material may be precipitation hardened directly by heat treatment at 482°C (900°F) to condition CH 900.

PROPRIETARY ATI 17-7 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

≥ 825 MPa

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Elongation, A

7 — 30 %

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Rockwell Hardness (HR)

val1

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Yield Strength, Rp0.2

≥ 345 MPa

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PROPRIETARY ATI 17-7 International Equivalent Materials

Showing 1 of 103 results.

MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

17-7 PH

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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103Cross References

9Composition
16Mechanical Properties
20Physical Properties
1Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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