MIL S-860B Grade G Stainless steels

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

Data updates

Latest Update: 2015-05
Total number of updates: 1
Update History

This material has 20 properties — only a subset is shown here.

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MIL S-860B Grade G Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.1500
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
11.5000 – 13.0000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 1.0000
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

MIL-S-860B: 1966 / Steel forgings for steam turbine rotors

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MIL S-860B Grade G 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 20 properties — only a subset is shown here.

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MIL S-860B Grade G Heat Treatments


  • Heat treatment shall consist of quenching and tempering or normalizing and tempering. No straightening by any means is permissible after heat treatment form mechanical properties. Minimum tempering temperatures 1200°F (649°C). After heat treatment for mechanical properties and prior to heat stability testing, the forgings shall be rough machined completely and then stress relieved at a temperature 50°F (10°C) to 100°F(38°C). Below the final tempering temperature the forging shall be held at the stress relief temperature for a period of 2h per inch of maximum redial thickness.

MIL S-860B Grade G Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
≥ 655 MPa
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Elongation, A
≥ 18 %
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Impact Energy
val1
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J
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Reduction of Area
val1
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%
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Yield Strength, Rp0.2
≥ 483 MPa
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  • 3Cross References

  • 8Composition
  • 5Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

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

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

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

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