40C8 (India / IS) Material Properties

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: India / IS

Data updates

Latest Update: 2022-08
Total number of updates: 3
Update History:
2019-03 2013-12

Mechanical Properties

Temperature

0 - 30°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Yield Strength, Rp0.2 val1
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MPa view details
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 540 — 850 MPa view details
Elongation, A 8 % view details
Reduction of Area val1
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% view details
Impact Energy val1
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J view details
Brinell Hardness (HB) ≤ 240 view details
Rockwell Hardness (HR) val1
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Yield Strength, Rp0.2 val1
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ksi view details
Yield Strength, Rp0.2 val1
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ksi view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 78.3 — 123.3 ksi view details
Elongation, A 8 % view details
Reduction of Area val1
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% view details
Impact Energy val1
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ft·lb view details
Brinell Hardness (HB) ≤ 240 view details
Rockwell Hardness (HR) val1
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Physical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Density 7.67 — 7.86 kg/dm³ view details
Poisson Coefficient val1
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Service Temperature ≤ 425 °C view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 ksi view details
Density 0.277 — 0.284 lb/in³ view details
Poisson Coefficient val1
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Service Temperature ≤ 797 °F view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.3500 – 0.4500
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
0.6000 – 0.9000
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.0350
UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

IS 5517: 2006 / Steels for Hardening and Tempering - Specification

Heat Treatments

  • Annealed: 830-860°C; Subcritical annealed: 650-700°C; Normalized: 830-860°C; Hardened: 830-860°C; Tempered: max. 660°C;
  • Hardened and quenched: hardened: 830-860°C, quenched in an oil