BÖHLER M201 (PROPRIETARY) Material Properties

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

Data updates

Latest Update: 2017-02
Total number of updates: 1
Update History:

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Brinell Hardness (HB) 290 — 330 view details
Brinell Hardness (HB) 290 — 330 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
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 33 W/(m∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Electrical Resistivity 0.19 Ω∙mm²/m view details
Electrical Conductivity val1
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S/m view details
Modulus of Elasticity 27.6 E+03 — 30.5 E+03 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 19.1 BTU/(h∙ft∙°F) view details
Heat Capacity val1
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BTU/(lb∙°F) view details
Electrical Resistivity 316 E-06 Ω∙circular·mil/ft view details
Electrical Conductivity val1
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S/in view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
val1
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UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-47-3
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
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

Böhler Edelstahl, Product Data Sheets / Available at: www.bohler-edelstahl.com, visited 2017

Heat Treatments

  • Normalizing at 850 to 900°C / Air cooling; <br /> Annealing at 720 to 740°C. Slow controlled cooling in furnace at a rate of 10 to 20°C/hr down to approx. 600°C, further cooling in air. Hardness after annealing: max. 230 HB. <br /> Stress relieving at approx. 600°C.In hardened and tempered condition approx. 30 to 50°C below the tempering temperature. After through heating, hold at temperature in neutral atmosphere for 1 to 2 hours / slow cooling in furnace.<br /> Hardening at 840 to 860°C / oil or at 860 to 880 °C / air. After through soaking, hold for 15 to 30 minutes. Obtainable hardness: approx. 55 HRC.<br /> Tempering: Slow heating to tempering temperature immediately after hardening / time in furnace: 1 hour for each 20 mm of workpiece thickness, but at least 2 hours / cooling in air. For average hardness values after tempering please refer to the tempering chart.<br /> Surface treatment: Nitriding: Variation of hardness. Gas nitriding in a stream of ammonia 50 hours at 520°C. Bath nitriding ( Tufftride-process ) 2 hours at 570°C.