ASTM A 731 Grade 18Cr-2Mo Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country / Standard: United States / ASTM

Data updates

Latest Update: 2022-04
Total number of updates: 3
Update History
2020-11 2019-07

This material has 29 properties — only a subset is shown here.

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ASTM A 731 Grade 18Cr-2Mo Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.025
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
17.5 – 19.5
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu+Ni
VALUE
≤ 1.00
UNIT
%
CAS NUMBER
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
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
CRITERIA
Ti+Nb
VALUE
val1
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UNIT
%
CAS NUMBER

A731/A731M: 1985 / Seamless, Welded Ferritic, and Martensitic Stainless Steel Pipe

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ASTM A 731 Grade 18Cr-2Mo 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 29 properties — only a subset is shown here.

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ASTM A 731 Grade 18Cr-2Mo Heat Treatments


  • As a final heat treatment, pipe shall be heated to a temperature of 760°C (1400°F) or higher and cooled as appropriate for the grade.

ASTM A 731 Grade 18Cr-2Mo Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
≥ 415 MPa
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Elongation, A
≥ 20 %
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Yield Strength, Rp0.2
≥ 275 MPa
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ASTM A 731 Grade 18Cr-2Mo International Equivalent Materials


Showing 5 of 6 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
STANDARD
ASME
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
STANDARD
IS
COUNTRY / PRODUCER
India
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit

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  • 6Cross References

  • 10Composition
  • 3Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

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

  • -Joints
  • -Coatings
  • 4Dimensions
  • -Tribology

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

  • 2Total Suppliers