SAE 872 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country / Standard: United States / SAE

Data updates

Latest Update: 2018-12

Total number of updates: 1

Update History

This material has 20 properties — only a subset is shown here.

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SAE 872 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.6 – 0.9

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

15 – 25

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

Balance

UNIT

CAS NUMBER

7439-89-6

CRITERIA

Other

VALUE

val1

UNIT

CAS NUMBER

SAE J 471: 2018 / Sintered powder metal parts: Ferrous

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SAE 872 Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Density

7.1 — 7.86 kg/dm³

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Poisson Coefficient

0.27 — 0.3

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This material has 20 properties — only a subset is shown here.

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SAE 872 Heat Treatments

P/M parts are porous and thus provide more surface area in any metal/gas reactions proceeding during heat treatment. In any given set of heat treating circumstances, the depth of carburization or decarburization will increase with decreasing density. Provided that the proper care is taken to maintain the appropriate carbon potential, carbon bearing iron-base P/M parts can be heat treated by conventional quench-hardening methods. It should be noted that the porous material will, on cooling, absorb some of the quench medium, perhaps resulting in some minor problems during tempering or further treatment. The absorption of fluids by the porous materials usually precludes the use of liquid salt bath treatments.
STEAM TREATMENT - This process consists of heating ferrous parts to 1000-1100°F (540-600°C) and subjecting them to superheated steam under pressure. A layer of black iron oxide is formed on all external and internal (interconnected porosity) surfaces. This oxide layer improves wear resistance, surface hardness, compressive strength and, under some conditions, corrosion resistance. The presence of oxide within the pores tends to close these channels, reducing the volume of interconnected porosity and providing a measure of pressure tightness. Steam treatment usually results in a decrease in impact resistance. It should also be noted that oxidation can lead to the generation of internal stresses with a general degradation of mechanical properties.

SAE 872 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Yield Strength, Rp0.2

586 — 827 MPa

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Compression Yield Strength

621 MPa

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4Cross References

4Composition
3Mechanical Properties
4Physical Properties
1Heat Treatment
-Metallography
-Machinability

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

-Joints
-Coatings
4Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

-Total Suppliers