UNI 18 NiCrMo 5 Structural and constructional steels

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

Data updates

Latest Update: 2021-04
Total number of updates: 4
Update History
2019-08 2019-07 2017-08

This material has 291 properties — only a subset is shown here.

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UNI 18 NiCrMo 5 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.15 – 0.21
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.70 – 1.00
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.60 – 0.90
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 7846: 1978 / Finished products in hot rolled unalloyed or special hardening alloyed steel bars and rolls. Quality, requirements and tests

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UNI 18 NiCrMo 5 Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Electrical Resistivity
0.16 Ω∙mm²/m
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Density
val1
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kg/dm³
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Electrical Conductivity
val1
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S/m
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Heat Capacity
val1
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J/(kg∙°C)
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Thermal Conductivity
41 W/(m∙°C)
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Poisson Coefficient
val1
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Shear Modulus
val1
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GPa
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This material has 291 properties — only a subset is shown here.

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UNI 18 NiCrMo 5 Heat Treatments


  • Hot worked at 1100-900°C; Cementation at 870-900°C; Core hardened at 840-870°C; Surface hardened at 800-830°C. Quenched in hot water bath; Stress relieved at 150-200°C.
  • 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). Spheroidise Annealed (Spheroidised). Annealed to obtained a lamellar ferrite and pearlite structure (Annealed). The H + T values shown in the mechanical properties table are obtained from an 11mm test bar hardened by oil quenching from 850°C +/- 10°C after holding at temperature for at least 30 minutes, and tempered at 180°C +/- 10°C for at least 1 hour. Final Heat Treatment: Case harden at 870 - 900°C. Harden the core by oil quenching from 840 - 870°C. Harden the case by oil quenching from 800 - 830°C. Finally, temper at 150 - 200°C.

UNI 18 NiCrMo 5 Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
785 — 1520 MPa
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Brinell Hardness (HB)
149 — 275
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Elongation, A
≥ 8 %
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Impact Energy
val1
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J
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Yield Strength, Rp0.2
val1
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MPa
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UNI 18 NiCrMo 5 International Equivalent Materials


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Official
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Germany
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Germany
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Hungary
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NBN
COUNTRY / PRODUCER
Belgium
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Official

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  • 99Cross References

  • 28Composition
  • 39Mechanical Properties
  • 10Physical Properties
  • 6Heat Treatment
  • -Metallography
  • -Machinability

  • 5Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep

  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology

  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation

  • 104Total Suppliers