C 43 (Italy / UNI) Material Properties
Material group:
Ferrous Alloys / Structural and constructional steels
Country/Standard:
Italy / UNI
Data updates
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Mechanical Properties
Temperature
Physical Properties
Temperature
Composition
CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.40 – 0.46
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Mn
VALUE
0.50 – 0.80
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
P
VALUE
≤ 0.030
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
UNI 7847: 1979 / Hot rolled, unalloyed and alloyed special steel products, bars and coils, for surface hardening. Qualities, requirements and tests
Heat Treatments
- Material is normally supplied in the annealed or normalised condition. The values shown in the mechanical properties table apply to the following conditions: TC: Annealed. TD: Normalised. TF: Hardened and tempered. Spheroidised: Spheroidise annealed. Heat treated: Normalised or hardened and tempered followed by surface hardening followed by stress relieving at 140 to 180°C for one hour (to achieve the minimum surface hardness value specified after flame or induction hardening followed by stress relieving). Anneal at 650 - 700°C. Normalise at 840 - 860°C. Harden from 840 - 880°C and temper at 550 - 660°C for at least 1 hour.
- Material is normally supplied in the hot rolled condition but, subject to agreement, may be supplied in one of the following conditions: Soft Annealed (SA) to a maximum hardness by annealing at 650 - 700°C. Spheroidise Annealed (Spheroidised). Annealed to obtain a ferritic/pearlite structure (Annealed). Normalized at 860 - 890°C. Hardened and Tempered (H+T). The H+T values shown in the mechanical properties table are obtained from a test piece hardened by water quenching from 840 - 860°C followed by tempering at 550 - 650°C for at least 1 hour. The temperature of the water must be between 15 - 30°C. The Rockwell C Scale hardness minimum value (Heat Treated condition) shown in the mechanical properties table is the surface hardness which must be obtained whether material is in the normalised condition and subsequently surface hardened or whether the material is in the hardened and tempered condition and subsequently surface hardened; Both treatments are followed by tempering at 140-180°C for approximately 1 hour.
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38 Cross References
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10 Composition
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129 Mechanical Properties
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3 Physical Properties
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5 Heat Treatment
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- Metallography
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- Machinability
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- Stress-Strain
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- Formability
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- Fatigue
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1 Fracture
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- Creep
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- Joints
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- Coatings
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- Dimensions
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- Tribology
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- Corrosion
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- Ageing
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- Weatherability
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- Irradiation
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