UNI X 70 CrMnNiN 21 6 Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country / Standard: Italy / UNI

Data updates

Latest Update: 2019-05
Total number of updates: 1
Update History

This material has 26 properties — only a subset is shown here.

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UNI X 70 CrMnNiN 21 6 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.65 – 0.75
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
20 – 22
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
5.5 – 7
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
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 3992: 1975 / Hot rolled finished special alloyed steel products. Round bars for internal combustion engine valves

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UNI X 70 CrMnNiN 21 6 Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Density
val1
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kg/dm³
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Poisson Coefficient
val1
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This material has 26 properties — only a subset is shown here.

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UNI X 70 CrMnNiN 21 6 Heat Treatments


  • Quenching from the austenitizing temperature: heated at 1170-1190°C for 1h; quenched in water.
    Precipitated: heated at 750-770°C for 16h; cooled in air.

UNI X 70 CrMnNiN 21 6 Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
980 — 1180 MPa
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Brinell Hardness (HB)
≤ 270
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Elongation, A
≥ 8 %
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Reduction of Area
val1
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%
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Yield Strength, Rp0.2
val1
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MPa
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  • 7Cross References

  • 8Composition
  • 5Mechanical Properties
  • 5Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

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

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

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

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