PROPRIETARY MA2 Stainless steels

Material group: Ferrous Alloys / Stainless steels

Country / Standard: PROPRIETARY

Data updates

Latest Update: 2020-08

Total number of updates: 1

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This material has 33 properties — only a subset is shown here.

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PROPRIETARY MA2 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

≤ 0.2100

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

≤ 13.3000

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 0.3500

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

Arcelor Mittal, Product Data Sheets,

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PROPRIETARY MA2 Physical Properties

Temperature

0 - 30°C 100 - 300°C ≥ 300°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 215 GPa

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Electrical Resistivity

0.62 Ω∙mm²/m

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Density

val1 kg/dm³

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Heat Capacity

val1 J/(kg∙°C)

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Thermal Conductivity

30 W/(m∙°C)

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Electrical Conductivity

val1 S/m

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Melting Temperature

val1 °C

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Poisson Coefficient

val1

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This material has 33 properties — only a subset is shown here.

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PROPRIETARY MA2 Heat Treatments

The recommended treatment is austenitisation with 10 min. holding at 1025°C - 1050°C followed by cooling in less than 1 min. to 20°C in a nitrogen and hydrogen reducing atmosphere and then tempering for 1 hour at 180°C.
An austenitising temperature below 1025°C is possible but it will result in a lower hardness. Conversely, an austenitising temperature higher than 1050°C, without exceeding 1100°C, will allow to increase the hardness of martensitic grades.
The tempering temperature can be increased slightly to 225°C to improve impact resistance but at the expense of the hardness. On the other hand it is not recommended to drop it below 180°C in order to prevent embrittlement of the part.

PROPRIETARY MA2 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

580 MPa

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Elongation, A

25 %

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Rockwell Hardness (HR)

val1

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Vickers Hardness (HV)

val1

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Yield Strength, Rp0.2

340 MPa

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-Cross References

9Composition
6Mechanical Properties
14Physical Properties
1Heat Treatment
-Metallography
-Machinability

1Stress-Strain
-Formability
-Fatigue
-Fracture
-Creep

-Joints
-Coatings
-Dimensions
-Tribology

-Corrosion
-Ageing
-Weatherability
-Irradiation

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