MS SMnC 420 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country / Standard: Malaysia / MS

Indicative price:

Data updates

Latest Update: 2015-12

Total number of updates: 1

Update History

This material has 30 properties — only a subset is shown here.

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MS SMnC 420 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.17 – 0.23

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

0.35 – 0.70

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

1.20 – 1.50

UNIT

CAS NUMBER

7439-96-5

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

MS 1795: 2005 / Steels for cold heading and cold extruding - Specifications

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MS SMnC 420 Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Density

7.67 — 7.86 kg/dm³

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Poisson Coefficient

0.27 — 0.3

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This material has 30 properties — only a subset is shown here.

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MS SMnC 420 Heat Treatments

Carburizing: 880-980°C; Direct and simple hardening: 820-860°C; Double hardening - Core hardening: 860-900°C, Case hardening: 780-820°C; Tempering: 150-200°C; The temperatures given for carburizing, direct and simple hardening, core hardening, case hardening and tempering are for guidance only. The actual temperatures chosen should be those that will give the properties required; The carburizing temperature will depend on the chemical composition of the steel, the mass of the product, and the carburizing medium. In general, if the steels are direct hardened, a temperature of 950°C is not exceeded. Also, for special procedures e.g. under vacuum, higher temperatures, e.g. 1020-1050°C, are not unusual; If the steels are direct hardened and if there is a danger of distortion, they should be quenched from a temperature between the core-hardening and case-hardening temperatures; Time for tempering, as a guide: 1h minimum. Quenching temperature (hardenability): 870 ± 5°C.

MS SMnC 420 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

650 — 1230 MPa

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Elongation, A

≥ 9 %

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Impact Energy

val1 J

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Reduction of Area

val1 %

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Yield Strength, Rp0.2

≥ 450 MPa

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18Mechanical Properties
3Physical Properties
2Heat Treatment
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