MIL 8630 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country / Standard: United States / MIL
Indicative price:

Data updates

Latest Update: 2022-12
Total number of updates: 5
Update History
2021-02 2019-03 2016-01 2014-10

This material has 87 properties — only a subset is shown here.

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MIL 8630 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.2800 – 0.3300
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.4000 – 0.6000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
≤ 0.3500
UNIT
%
CAS NUMBER
7440-50-8
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
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-6050A: 1967 / Steel, Chrome-Nickel-Molybdenum (8630) Bars and Reforging Stock (Aircraft Quality)

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MIL 8630 Physical Properties


Temperature

PROPERTY / VALUE
Compression Modulus
200 GPa
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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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Shear Modulus
val1
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GPa
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This material has 87 properties — only a subset is shown here.

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MIL 8630 Heat Treatments


  • Normalizing temperature range 1600-1700°F, air quenched; Annealing temperature range 1525-1575°F; Furnace cool to 1000°F or below; (Recommended subcritical anneal temperature is 1250°F); Austenitizing temperature range 1525-1600°F; Medium for quenching: oil, water or polymer.

MIL 8630 Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
621 — 1379 MPa
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Brinell Hardness (HB)
≤ 229
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Compression Yield Strength
val1
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MPa
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Elongation, A
12 — 22 %
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Rockwell Hardness (HR)
val1
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Yield Strength, Rp0.2
val1
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MPa
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Reduction of Area
val1
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%
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MIL 8630 International Equivalent Materials


Showing 2 of 23 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%

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  • 23Cross References

  • 24Composition
  • 19Mechanical Properties
  • 16Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

  • 3Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep

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

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

  • 1Total Suppliers