IS X70Cr21Mn6Ni2N Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country / Standard: India / IS

Data updates

Latest Update: 2021-06
Total number of updates: 1
Update History

This material has 67 properties — only a subset is shown here.

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IS X70Cr21Mn6Ni2N Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.65 – 0.75
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
20.00 – 22.00
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
5.5 – 7.0
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

Specification for steel for valves for internal combustion engines, IS 7494, 1981

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IS X70Cr21Mn6Ni2N Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Density
7.61 — 8.1 kg/dm³
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Poisson Coefficient
0.27 — 0.3
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This material has 67 properties — only a subset is shown here.

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IS X70Cr21Mn6Ni2N Heat Treatments


  • Solution treatment + Patenting (ST+P): 1100-1200°C, Quenching media: water; Tempering: 730-780°C.
  • Solution treated and precipitation hardened: 1100-1200°C, water quenched; Tempered: 730-780°C (temperature for ageing treatment).

IS X70Cr21Mn6Ni2N Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
≥ 1030 MPa
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Brinell Hardness (HB)
321 — 390
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Elongation, A
val1
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%
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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

  • 15Composition
  • 14Mechanical Properties
  • 3Physical Properties
  • 2Heat Treatment
  • -Metallography
  • -Machinability

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

  • -Joints
  • -Coatings
  • 26Dimensions
  • -Tribology

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

  • -Total Suppliers