MIL Grade 250 Type I Structural and constructional steels

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

Data updates

Latest Update: 2016-01
Total number of updates: 1
Update History

This material has 33 properties — only a subset is shown here.

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MIL Grade 250 Type I Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
0.0500 – 0.1500
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
B
VALUE
≤ 0.0030
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
C
VALUE
≤ 0.0300
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Ca
VALUE
val1
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UNIT
%
CAS NUMBER
7440-70-2
CRITERIA
Co
VALUE
val1
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UNIT
%
CAS NUMBER
7440-48-4
CRITERIA
Fe
VALUE
val1
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UNIT
%
CAS NUMBER
7439-89-6
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
CRITERIA
Ti
VALUE
val1
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UNIT
%
CAS NUMBER
7440-32-6
CRITERIA
Zr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-67-7

MIL-S-46850D: 1991 / Steel: bar, plate, sheet, strip, forgings, and extrusions, 18 percent nickel alloy, maraging,

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MIL Grade 250 Type I 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
0.27 — 0.3
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This material has 33 properties — only a subset is shown here.

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MIL Grade 250 Type I Heat Treatments

  • When received solution annealed condition, shall conform to the following requirements for mechanical properties after aging for 3 to 6 hours +/- 10 minutes at 482+/-5°C followed by air cooling to room temperature.

MIL Grade 250 Type I Mechanical Properties

Temperature

PROPERTY / VALUE
Elongation, A
≥ 3 %
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Yield Strength, Rp0.2
≥ 1655 MPa
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Impact Energy
val1
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J
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Rockwell Hardness (HR)
≥ 34
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MIL Grade 250 Type I International Equivalent Materials

Showing 3 of 6 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
Grade 250 Type II
STANDARD
MIL
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
Grade 250 Type III
STANDARD
MIL
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
Grade 250 Type IV
STANDARD
MIL
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%

Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.

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  • 6Cross References
  • 14Composition
  • 9Mechanical 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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