GB 70MnCr Structural and constructional steels

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

Data updates

Latest Update: 2023-04
Total number of updates: 1
Update History

This material has 14 properties — only a subset is shown here.

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GB 70MnCr Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.67 – 0.76
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.50 – 0.70
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
1.00 – 1.20
UNIT
%
CAS NUMBER
7439-96-5
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 24181: 2022 / Steels for diamond welded saw blades

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GB 70MnCr Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Density
7.67 — 7.86 kg/dm³
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Poisson Coefficient
0.27 — 0.3
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This material has 14 properties — only a subset is shown here.

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GB 70MnCr Heat Treatments

  • 1. 790-820°C and cooling medium
    2. 400-450°C and cooling medium

GB 70MnCr Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
1140 — 1450 MPa
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Brinell Hardness (HB)
≤ 360
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Rockwell Hardness (HR)
38 — 47
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  • -Cross References
  • 6Composition
  • 4Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • -Total Suppliers