SAE 300M Structural and constructional steels
Material group:
Ferrous Alloys / Structural and constructional steels
Country / Standard:
United States / SAE
Data updates
Latest Update: 2020-07
Total number of updates: 6
Update History
2019-12
2019-09
2019-01
2016-11
2015-05
This material has 109 properties — only a subset is shown here.
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SAE 300M Chemical Composition
CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.40
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.85
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.75
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
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2
SAE J 467b: 1968 / Special Purpose Alloys (ʺSuperalloysʺ)
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SAE 300M Physical Properties
Temperature
Modulus of Elasticity
190 — 210
GPa
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Thermal Conductivity
37.499
W/(m∙°C)
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Density
7.67 — 7.86
kg/dm³
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Poisson Coefficient
val1
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This material has 109 properties — only a subset is shown here.
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SAE 300M Heat Treatments
- Annealing temperature: 843°C (1550°F), cool at a rate not to exceed 111°C (200°F) per hour to below 538°C (1000°F). Normalizing temperature: 927°C (1700°F); Austenitizing temperature: 871°C (1600°F). Hardening quenchant: oil, polymer, inert gas. (Marquenching in a nitrate/nitrite salt bath, oil bath, or alternate quenchant operated at a set temperature applicable to the alloys processed is permitted. The parts shall be in the marquenching bath only for sufficient time to stabilize the parts at the bath temperature, but not less than 2 minutes, followed by cooling to approximately ambient temperature. Salt residues shall be removed by a hot water rinse before air tempering).
Tempering: 302°C (575°F), at least two tempering operations are required.
All parts, shall be in one of the following conditions prior to austenitizing: normalized, normalized or tempered or hardened. If those parts have been normalized only without tempering or overaging, they shall be preheated before exposure to the austenitizing temperature. - Normalizing: 913-941°C (1675-1725°F), air quenched. Annealing: 829-857°C (1525-1575°F). Furnace cool to 316°C (600°F) or below (rate of furnace cool should be 28°C (50°F) per hour or slower). Recommended subcritical anneal temperature is 677°C (1250°F).
Austenitizing: 857-885°C (1575-1625°F). Medium for quenching: oil.
SAE 300M Mechanical Properties
Temperature
Tensile Strength
1930 — 2103
MPa
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Brinell Hardness (HB)
≥ 525
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Elongation, A
≥ 9
%
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Reduction of Area
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Rockwell Hardness (HR)
val1
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Yield Strength, Rp0.2
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Impact Energy
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SAE 300M International Equivalent Materials
Showing 13 of 16 results.
MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official
MATERIAL
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.
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- 16Cross References
- 7Composition
- 9Mechanical Properties
- 5Physical Properties
- 8Heat Treatment
- 11Metallography
- -Machinability
- 23Stress-Strain
- -Formability
- 7Fatigue
- 7Fracture
- -Creep
- -Joints
- -Coatings
- -Dimensions
- -Tribology
- -Corrosion
- -Ageing
- -Weatherability
- -Irradiation
- 16Total Suppliers