PROPRIETARY ASP X818 Stainless steels

Material group: Ferrous Alloys / Stainless steels
Country / Standard: PROPRIETARY

Data updates

Latest Update: 2015-03
Total number of updates: 1
Update History

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PROPRIETARY ASP X818 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 1.7000
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 18.0000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 0.3000
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
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

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PROPRIETARY ASP X818 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 230 GPa
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Density
7.6 — 8.1 kg/dm³
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Poisson Coefficient
0.27 — 0.3
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Coefficient of Thermal Expansion (CTE)
val1
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10-6/°C
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This material has 17 properties — only a subset is shown here.

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PROPRIETARY ASP X818 Heat Treatments

  • Soft annealing in a protective atmosphere at 850 - 900°C for 3h, slow cooling at 10°C/h down to 700°C, air cooling. Stress-relieving at 600 - 700°C for approximately 2h, slow cooling down to 500°C. Hardening in a protective atmosphere with pre-heating at 450 - 500°C and 850 - 900°C and austenitising at a temperature suitable for chosen working hardness. Cooling down to 40 - 50°C. Tempering at 560°C three times for at least 1h each time. Cooling to room temperature (25°C) between temperings. Surface treatment: Good substrate material for PVD and CVD coating. If nitriding is requested a small zone of 2 - 15 µm is recommended. The steel grade can also be steam-tempered if so desired.

PROPRIETARY ASP X818 Mechanical Properties

Temperature

PROPERTY / VALUE
Brinell Hardness (HB)
≤ 320
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  • -Cross References
  • 6Composition
  • 3Mechanical Properties
  • 6Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
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