IS 45C8 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: India / IS

Data updates

Latest Update: 2026-03

Total number of updates: 9

Update History

2022-08 2022-04 2019-03 2018-07 2017-07 2015-09 2013-12 2013-11

This material has 976 properties — only a subset is shown here.

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IS 45C8 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.40 – 0.50

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

0.60 – 0.90

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

≤ 0.035

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

IS 1875: 2025 / Steel Ingots, Billets, Blooms, Slabs, and Bars for Forging - Specification

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IS 45C8 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 976 properties — only a subset is shown here.

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IS 45C8 Heat Treatments

Annealed: 600-650°C or Hardened: 830-860°C, cooled in oil Tempered: 380-440°C
Annealed: 820-850°C; Subcritical annealed: 650-700°C; Normalized: 820-850°C; Hardened: 820-850°C; Tempered: 660°C;

IS 45C8 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Yield Strength, Rp0.2

val1 MPa

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Tensile Strength

340 — 1420 MPa

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Elongation, A

6 — 12 %

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Reduction of Area

val1 %

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Impact Energy

val1 J

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Brinell Hardness (HB)

170

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Rockwell Hardness (HR)

val1

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Vickers Hardness (HV)

val1

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Grain Size

val1 mm

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390 Cross References

105 Composition
166 Mechanical Properties
3 Physical Properties
10 Heat Treatment
- Metallography
- Machinability

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

- Joints
- Coatings
26 Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

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