38CrMoAlA (China / GB) Material Properties

Material group: Ferrous Alloys / Structural and constructional steels
Country/Standard: China / GB

Data updates

Latest Update: 2022-03
Total number of updates: 3
Update History:
2015-08 2014-10

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 930 MPa view details
Elongation, A 15 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) ≤ 269 view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 134.9 ksi view details
Elongation, A 15 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) ≤ 269 view details

Physical Properties

Temperature

0 - 30°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Density 7.67 — 7.86 kg/dm³ view details
Poisson Coefficient val1
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view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Thermal Conductivity 37.67 W/(m∙°C) view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 ksi view details
Density 0.277 — 0.284 lb/in³ view details
Poisson Coefficient val1
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view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°F view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°F view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°F view details
Thermal Conductivity 21.8 BTU/(h∙ft∙°F) view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
0.70 – 1.10
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.35 – 0.42
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
1.35 – 1.65
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
val1
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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

GB/T 3079: 1993 / Alloy structure steel wires

Heat Treatments

  • Quenching at 930-950°C / water or oil cooling; tempering at 600-670°C / water or oil cooling.
  • Tempered at 930-960°C, air-cooled at 650-680°C; Quenched and tempered (1) and (2): Heated at 930-950°C (oil or warm water quenched) and tempered at 600-670°C (oil or water cooled);