ASME X7Ni9 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: United States / ASME

Data updates

Latest Update: 2024-02
Total number of updates: 5
Update History
2024-01 2023-10 2020-01 2014-05

This material has 258 properties — only a subset is shown here.

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ASME X7Ni9 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.10
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr+Cu+Mo
VALUE
≤ 0.50
UNIT
%
CAS NUMBER
CRITERIA
Mn
VALUE
0.30 – 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
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2

Flat products made of steels for pressure purposes - Part 4: nickel alloy steels with specified low temperature properties, EN 10028-4 / 2017

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ASME X7Ni9 Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Density
7.67 — 7.86 kg/dm³
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Poisson Coefficient
val1
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Coefficient of Thermal Expansion (CTE)
val1
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10-6/°C
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Thermal Conductivity
36.3 W/(m∙°C)
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This material has 258 properties — only a subset is shown here.

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ASME X7Ni9 Heat Treatments

  • Quenched and tempered (+QT). (For nominal t < 15 mm, conditions +N plus +NT are also applicable.)
    Austenitizing at 770 to 830°C, water or oil cooling.
    Tempering at 540 to 600°C, air or water cooling.

ASME X7Ni9 Mechanical Properties


Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
575 MPa
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Tensile Strength
680 — 820 MPa
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Elongation, A
18 %
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Impact Energy
val1
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J
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  • 96 Cross References

  • 9 Composition
  • 42 Mechanical Properties
  • 59 Physical Properties
  • 1 Heat Treatment
  • - Metallography
  • - Machinability

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

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

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

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