38 NiCrMo 4 KB (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

0 - 30°C
PROPERTY / VALUE
Tensile Strength ≤ 690 MPa view details
Brinell Hardness (HB) ≤ 206 view details
Rockwell Hardness (HR) 38 — 43 view details
Tensile Strength ≤ 100.1 ksi view details
Brinell Hardness (HB) ≤ 206 view details
Rockwell Hardness (HR) 38 — 43 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 27.6 E+03 — 30.5 E+03 ksi view details
Density 0.277 — 0.284 lb/in³ view details
Poisson Coefficient 0.27 — 0.3 view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.34 – 0.41
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.70 – 1.00
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
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
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 7356: 1974 / Hot rolled finished steel products. Wire rods and round bars for cold- or hot-headed bolts, nuts and rivets

Heat Treatments

  • Material shall be supplied spheroidize annealed (Annealed). Response to Heat Treatment: The hardness value contained in the mechanical properties table for the Hardened condition is the minimum value required in the centre of a test piece with a maximum diameter of 30mm following hardening by oil quenching from 850°C. The hardness value shown for the Hardened and Tempered (H+T) condition is that required after final heat treatment.