PROPRIETARY ATI 418 SPL Stainless steels

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

Data updates

Latest Update: 2021-10
Total number of updates: 2
Update History
2016-12

This material has 56 properties — only a subset is shown here.

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PROPRIETARY ATI 418 SPL Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.15 – 0.20
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
12.00 – 14.00
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 0.50
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
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
W
VALUE
val1
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UNIT
%
CAS NUMBER
7440-33-7

Allegheny Technologies Incorporated, Product Data Sheets,

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PROPRIETARY ATI 418 SPL Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Electrical Resistivity
0.617 Ω∙mm²/m
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Density
7.61 — 8.1 kg/dm³
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Service Temperature
val1
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°C
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Electrical Conductivity
val1
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S/m
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Poisson Coefficient
val1
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This material has 56 properties — only a subset is shown here.

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PROPRIETARY ATI 418 SPL Heat Treatments

  • Forging temperature:
    Initial: 1093-1149°C (2000-2100°F);
    Final: 871-927°C (1600-1700°F).
    For maximum softness, the material should be heated to 657-679°C (1215-1255°F) and held for 6 hours at temperature followed by air cooling.
    If a somewhat higher hardness is not objectionable, a simpler annealing treatment is to heat the material to 704-732°C (1300-1350°F) followed by air cooling.
    May be fully hardened by oil quenching from 954-1038°C (1750-1900°F) for heavy sections and air cooling from the same range for thin sections.

PROPRIETARY ATI 418 SPL Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
792.9 — 1034.2 MPa
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Brinell Hardness (HB)
240 — 477
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Elongation, A
val1
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%
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Yield Strength, Rp0.2
val1
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MPa
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Impact Energy
val1
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J
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Rockwell Hardness (HR)
val1
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  • 4Cross References
  • 7Composition
  • 28Mechanical Properties
  • 13Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • 1Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 2Total Suppliers