PROPRIETARY SIHARD S471 Tool steels

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

Data updates

Latest Update: 2021-10
Total number of updates: 2
Update History
2017-06

This material has 32 properties — only a subset is shown here.

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PROPRIETARY SIHARD S471 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
1.10
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
7.90
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.35
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
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
CRITERIA
W
VALUE
val1
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UNIT
%
CAS NUMBER
7440-33-7

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PROPRIETARY SIHARD S471 Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Thermal Conductivity
30 W/(m∙°C)
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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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Poisson Coefficient
val1
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This material has 32 properties — only a subset is shown here.

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PROPRIETARY SIHARD S471 Heat Treatments

  • Annealing: Heat at a rate not exceeding 50°C/h to reach 820-860°C, and hold at that temperature for 1 h for every 25 mm of workpiece thickness, 2 h minimum. Then cool down slowly in furnace to 600°C at a rate not exceeding 20°C/h. Continue cooling to ambient temperature in furnace or in the air. The final hardness should be maximum 240 HB.
    Hardening: To minimize distortion and stresses in large or complex tools use double preheat. Heat at a rate not exceeding 50°C/h to 620-680°C for equalization, and then continue heating to reach 820-840°C. For normal tools, use only the second temperature range as a single preheating treatment. Heat rapidly from the preheat. Furnace or salt bath at 1040-1080°C. Equalize and soak at austenitizing temperature for 30 minutes for pieces up to 25 mm in thickness, plus 15 minutes for each additional 25 mm of thickness. Quenching at 1040 to 1080°C / air, oil or inert gas. To increase hardness by 1-2 HRC and dimensional stability after quenching, sub-zero treatment may be used. Temper immediately after quenching (when material reaches temp. 90-70°C). At least two tempering treatments are recommended to achieve a uniform tempered microstructure. Slowly heat to reach tempering temperature. Holding time in the furnace: 1 h for every 25 mm of workpiece thickness, but 2 h minimum. This is followed by air cooling. Typical tempering temperatures are 150 to 550°C. If surface treatment is to be applied, tempering temperature has to be 20-30°C higher than the temperature at which steel is treated.

PROPRIETARY SIHARD S471 International Equivalent Materials

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MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
OCR8W
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Composition 100%

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  • 1Cross References
  • 7Composition
  • -Mechanical Properties
  • 17Physical Properties
  • 3Heat Treatment
  • 1Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 3Total Suppliers