MIL 347 Stainless steels

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

Data updates

Latest Update: 2020-11
Total number of updates: 4
Update History
2019-05 2014-10 2014-09

This material has 1848 properties — only a subset is shown here.

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MIL 347 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.0800
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
17.0000 – 20.0000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 2.0000
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Nb+Ta
VALUE
val1
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UNIT
%
CAS NUMBER
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-P-1144D: 1975 / Pipe, corrosion-resistant, stainless steel, seamless or welded (future acquisition use MIL-P-24691/3)

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MIL 347 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
179.6 — 215 GPa
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Thermal Conductivity
val1
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W/(m∙°C)
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Electrical Resistivity
val1
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Ω∙mm²/m
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Density
val1
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kg/dm³
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Electrical Conductivity
val1
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S/m
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Heat Capacity
val1
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J/(kg∙°C)
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Melting Temperature
val1
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°C
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Poisson Coefficient
val1
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Shear Modulus
val1
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GPa
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Coefficient of Thermal Expansion (CTE)
val1
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10-6/°C
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This material has 1848 properties — only a subset is shown here.

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MIL 347 Heat Treatments

  • Annealing: Heating 1800 to 2050°F; When stress relieving after welding is specified, hold for 1/2 hour minimum at specified temperature or holding for 2 hours at 1650°F +/- 25°F. Cooling: air or water quench.
  • Pipe shall be furnished in the heat treated condition. The heat treatment procedure shall consist of annealing the pipe at a minimum temperature of 1900°C (1038°C) and the rapidly cooling the pipe at a sufficient rate so that all the material meets the requirements of the intergranular corrosion test.

MIL 347 Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 517 MPa
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Brinell Hardness (HB)
val1
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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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Reduction of Area
val1
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%
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MIL 347 International Equivalent Materials

Showing 15 of 498 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
30347
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
347
STANDARD
AISI
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
347
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
ABS Grade S
STANDARD
ABS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
A 271 TP347
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
A 473 347
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
A 473 S34700
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
F 2281 347
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
F738 Class A2-50 S34700
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
F738 Class A2-70 S34700
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
30347
STANDARD
IRAM
COUNTRY / PRODUCER
Argentina
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
04Cr19Ni9Nb40
STANDARD
IS
COUNTRY / PRODUCER
India
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
TP 347
STANDARD
NBR
COUNTRY / PRODUCER
Brazil
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
30347
STANDARD
NBR
COUNTRY / PRODUCER
Brazil
EQUIVALENCE CATEGORY
Composition 100%
MATERIAL
347
STANDARD
NBR
COUNTRY / PRODUCER
Brazil
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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  • 498Cross References
  • 58Composition
  • 568Mechanical Properties
  • 333Physical Properties
  • 3Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • 33Joints
  • -Coatings
  • 2Dimensions
  • -Tribology
  • 346Corrosion
  • 2Ageing
  • -Weatherability
  • -Irradiation
  • 5Total Suppliers