SAE HP 9-4-30 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country / Standard: United States / SAE

Data updates

Latest Update: 2023-04

Total number of updates: 6

Update History

2022-01 2020-11 2020-07 2017-02 2014-01

This material has 180 properties — only a subset is shown here.

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SAE HP 9-4-30 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.29 – 0.34

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

4.25 – 4.75

UNIT

CAS NUMBER

7440-48-4

CRITERIA

VALUE

0.90 – 1.10

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

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

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

SAE AMS 6524E: 1991 / Steel, Sheet, Strip, and Plate 1.0Cr - 7.5Ni - 4.5Co - 1.0Mo - 0.09V (0.29 - 0.34C) Consumable Electrode Vacuum Melted, Annealed

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SAE HP 9-4-30 Physical Properties

Temperature

≤ 0°C 0 - 30°C 30 - 100°C 100 - 300°C

PROPERTY / VALUE

Compression Modulus

205 GPa

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Modulus of Elasticity

190 — 210 GPa

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Density

val1 kg/dm³

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Poisson Coefficient

val1

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Thermal Conductivity

23.019 W/(m∙°C)

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Coefficient of Thermal Expansion (CTE)

val1 10^-6/°C

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This material has 180 properties — only a subset is shown here.

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SAE HP 9-4-30 Heat Treatments

Duplex annealed: heat to 677°C +/- 14, holding at heat for 4 hours +/-0.25, cooling to room temperature in air or other atmosphere at a rate equivalent to an air cool, reheating to 621°C +/- 14, holding at heat for 4 hours +/-0.25 and cooling to room temperature in air or other atmosphere at a rate equivalent to an air cool;
Heat treatment for specimens:
Normalized: heat to 913°C ± 14, hold at heat for not less than 1 hour per 25 mm of maximum section thickness, and cool at a rate equivalent to air cooling to room temperature;
Hardened: heat to 843°C ± 14, hold at heat for 1 hour per 25 mm of maximum section thickness but not less than 1 hour, quench sections 102 mm and under in nominal thickness into room temperature oil or water and sections over 102 mm in nominal thickness into room temperature oil. Cool to -73°C ± 6, within 2 hours after quenching, hold at -73°C ± 6 for not less than 2 hours, and warm in air to room temperature;
Tempered: heat to 538°C ± 6, hold at heat for not less than 2 hours, cool to below 52 °C, reheat to 538°C ± 6, hold at heat for not less than 2 hours, and cool in air to room temperature.
Normalize by heating to 899°C +/-10, holding at heat for 1 hour per 25,4 mm of maximum cross-section, and cooling in air to room temperature; harden by heating to 843°C +/-10, holding at heat for 1 hour per 25,4 mm of maximum cross-section but not less than 1 hour and quenching in oil or water; cooling to -73°C +/-10, holding at -73°C +/-10 for not less than 2 hours, warming to room temperature; and double temper by heating to 524°C +/-5, holding at heat for 2 hours per inch of maximum cross-section but not less than 2 hours, cooling to approximately 52°C, reheating to 524°C +/-5, holding at heat for 2 hours per 25,4 mm of maximum cross-section but not less than 2 hours and cooling in air to room temperature.

SAE HP 9-4-30 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

≥ 1138 MPa

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Brinell Hardness (HB)

≤ 341

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Compression Yield Strength

val1 MPa

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Elongation, A

≥ 6 %

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Rockwell Hardness (HR)

val1

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Yield Strength, Rp0.2

val1 MPa

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Grain Size

val1

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Reduction of Area

val1 %

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SAE HP 9-4-30 International Equivalent Materials

Showing 9 of 10 results.

MATERIAL

STANDARD

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

MATERIAL

9Ni-4Co-0.30C

STANDARD

SAE

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Identical

MATERIAL

K91283

STANDARD

UNS

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Official

MATERIAL

K91313

STANDARD

UNS

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Official

MATERIAL

A 579 Grade 82 Class 1380 (200)

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

MATERIAL

9Ni-4Co-0.30C

STANDARD

AISI

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

MATERIAL

A 646 Grade 17

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

MATERIAL

A 646 Grade HP 9-4-30

STANDARD

ASTM

COUNTRY / PRODUCER

United States

EQUIVALENCE CATEGORY

Implicit

MATERIAL

LESCALLOY HP 9-4-30 VAC-ARC

STANDARD

PROPRIETARY

COUNTRY / PRODUCER

EQUIVALENCE CATEGORY

Implicit

MATERIAL

HP 9-4-30

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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10Cross References

22Composition
20Mechanical Properties
17Physical Properties
2Heat Treatment
-Metallography
-Machinability

19Stress-Strain
-Formability
-Fatigue
9Fracture
-Creep

-Joints
-Coatings
74Dimensions
-Tribology

-Corrosion
5Ageing
-Weatherability
-Irradiation

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