45 SiCrMo 6 (Italy / UNI) Material Properties

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: Italy / UNI

Data updates

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Total number of updates: 0
Update History:
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Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 1370 — 1620 MPa view details
Elongation, A 6 % view details
Brinell Hardness (HB) 255 view details
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 1370 — 1620 MPa view details
Elongation, A 6 % view details
Brinell Hardness (HB) 255 view details

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 0.27 — 0.3 view details
Modulus of Elasticity 190 — 210 GPa view details
Density 7.67 — 7.86 kg/dm³ view details
Poisson Coefficient 0.27 — 0.3 view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.42 – 0.50
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.50 – 0.75
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.50 – 0.80
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
P
VALUE
val1
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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 3545: 1980 / Hot rolled special alloyed steel finished products, bars and wire rod, for quenched and tempered springs. Qualities, requirements and tests

Heat Treatments

  • This material is normally supplied in the annealed or normalized condition. The following temperatures are given in the specification as guidelines. Anneal at 640 to 700°C. Normalize at 860°C and air cool. Except for the Brinell hardness values, the values shown in the mechanical properties table apply to longitudinal testing of 10mm diameter test pieces subjected to the following quench and temper reference heat treatment (Q + T): Harden by oil quenching from 865°C +/- 10°C, after holding at temperature for a minimum of 1/2 hour, and temper at 480°C +/- 20°C for a minimum of 1 hour. The final heat treatment of springs may be carried out as follows (these are guideline temperatures only): Harden by oil quenching from 850 to 860°C. Temper at 400 to 450°C.