PROPRIETARY 440C Stainless steels

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

Data updates

Latest Update: 2025-10
Total number of updates: 2
Update History
2021-06

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PROPRIETARY 440C Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.9500 – 1.2000
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
16.0000 – 18.0000
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
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

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PROPRIETARY 440C Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 215 GPa
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Electrical Resistivity
0.8 Ω∙mm²/m
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Density
val1
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kg/dm³
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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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Thermal Conductivity
15 — 22.846 W/(m∙°C)
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Dynamic Modulus of Elasticity
val1
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GPa
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Electrical Conductivity
val1
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S/m
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Poisson Coefficient
val1
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Coefficient of Thermal Expansion (CTE)
val1
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10-6/°C
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This material has 399 properties — only a subset is shown here.

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PROPRIETARY 440C Heat Treatments

  • Annealing 800-850°C/slow cool; Hardening 1010-1060°C/O.Q./A.C.;Tempering 180-430°C/air
  • Hot Working
    Preheat to 760/816°C (1400/1500°F), then heat slowly and uniformly to 1038/1149°C (1900/2100°F). Do not forge below 954°C (1750°F), and reheat as often as necessary. Furnace cool slowly. Anneal after forging; cool to room temperature before annealing.
    Annealing
    Heat to 843-871°C (1550-1600°F), slow cool in furnace. Brinell hardness should be approximately 223.
    Hardening
    Heat to 1010/1066°C (1850/1950°F). Quench in warm oil or air. Do not overheat. Temper between 149-427°C (300-800°F) depending on desired hardness. Temper immediately after quenching.
    Cold Working
    If annealed for maximum softness, this steel can be moderately cold formed or headed.

PROPRIETARY 440C Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
1965 MPa
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Brinell Hardness (HB)
≤ 580
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Elongation, A
2 %
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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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PROPRIETARY 440C International Equivalent Materials

Showing 15 of 188 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
SUS440C
STANDARD
JIS
COUNTRY / PRODUCER
Japan
EQUIVALENCE CATEGORY
Official
MATERIAL
440C
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
440 C
STANDARD
AISI
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 580 Type 440C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 493 Type 440C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
51440C
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 473 440C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 276 440C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 314 440C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 959 Type 440C
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 314 S44004
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 473 S44004
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 493 S44004
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
S44004
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
A 276 S44004
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official

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

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  • 188Cross References
  • 30Composition
  • 19Mechanical Properties
  • 17Physical Properties
  • 3Heat Treatment
  • -Metallography
  • -Machinability
  • 1Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 141Total Suppliers