45 (China / GB) Material Properties

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

Data updates

Latest Update: 2025-01
Total number of updates: 21
Update History:
2023-02 2022-08 2022-07 2022-04 2021-12 2021-05 2021-04 2021-01 2020-05 2020-04 2020-02 2018-07 2018-06 2017-09 2017-01 2016-12 2016-05 2015-08 2014-10 2014-05

Mechanical Properties

Temperature

≤ 0°C
0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 400 — 1030 MPa view details
Elongation, A 4 % view details
Reduction of Area val1
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% view details
Impact Strength val1
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kJ/m² view details
Impact Strength val1
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kJ/m² view details
Impact Energy val1
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J view details
Brinell Hardness (HB) 156 — 302 view details
Rockwell Hardness (HR) val1
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view details
Vickers Hardness (HV) val1
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view details
Grain Size val1
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view details
Yield Strength, Rp0.2 val1
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ksi view details
Tensile Strength 58 — 149.4 ksi view details
Elongation, A 4 % view details
Reduction of Area val1
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% view details
Impact Strength val1
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ft·lb/in² view details
Impact Strength val1
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ft·lb/in² view details
Impact Energy val1
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ft·lb view details
Brinell Hardness (HB) 156 — 302 view details
Rockwell Hardness (HR) val1
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view details
Vickers Hardness (HV) val1
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view details
Grain Size val1
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view details

Physical Properties

Temperature

0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 210 GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Density val1
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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 48.15 W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Electrical Resistivity 0.132 Ω∙mm²/m view details
Electrical Conductivity val1
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S/m view details
Service Temperature val1
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°C view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 ksi view details
Modulus of Elasticity val1
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ksi view details
Modulus of Elasticity val1
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ksi view details
Modulus of Elasticity val1
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ksi view details
Density val1
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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 27.8 BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details
Thermal Conductivity val1
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BTU/(h∙ft∙°F) view details
Heat Capacity val1
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BTU/(lb∙°F) view details
Heat Capacity val1
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BTU/(lb∙°F) view details
Heat Capacity val1
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BTU/(lb∙°F) view details
Electrical Resistivity 219 E-06 Ω∙circular·mil/ft view details
Electrical Conductivity val1
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S/in view details
Service Temperature val1
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°F view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.42 – 0.50
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 0.25
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
≤ 0.25
UNIT
%
CAS NUMBER
7440-50-8
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
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 699: 2015 / Quality carbon structural steels

Heat Treatments

  • <b>Normalized </b> at 850 ± 30°C, air cooled; <br> <b>Quenched and tempered:</b> Heated at 840 ± 20°C (oil quenched) and tempered at 600 ± 50°C (oil quenched)
  • Normalizing at 850°C; Quenching at 840°C; Tempering at 600°C.