BÖHLER M340 ISOPLAST (PROPRIETARY) Material Properties

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

Data updates

Latest Update: 2025-01
Total number of updates: 4
Update History:
2022-09 2021-02 2017-08

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Brinell Hardness (HB) ≤ 260 view details
Brinell Hardness (HB) ≤ 260 view details

Physical Properties

Temperature

0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 219 GPa view details
Density 7.61 — 8.1 kg/dm³ view details
Poisson Coefficient val1
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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 18.2 W/(m∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Modulus of Elasticity 27.6 E+03 — 31.8 E+03 ksi view details
Density 0.275 — 0.293 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 10.5 BTU/(h∙ft∙°F) view details
Heat Capacity val1
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BTU/(lb∙°F) 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
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
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

Böhler Edelstahl, Product Data Sheets / Available at: www.bohler-edelstahl.com, visited 2024

Heat Treatments

  • <b>Stress relieving:</b> 650°C (1202°F); After temperature equalization, soak for 1 to 2 hours in neutral atmosphere. Slow cooling in furnace. After hardening and tempering, stress relieving has to be performed 50°C (90°F) below last tempering temperature.<br><br /><b>Hardening and tempering:</b> 980-1000°C (1796-1832°F); For hardening hold at temperature for 15 to 30 min. An optional sub-zero treatment at -80°C (-112°F) can be applied after hardening. For highest corrosion resistance, temper once for a minimum of 2h at 250-350°C (482-662°F). For best wear resistance, temper twice for a minimum of 2h at 505-520°C (941-968°F) (without sub-zero treatment) or 490-505°C (914-941°F) (with sub-zero treatment). After each heat treatment step, material should be cooled down to approx. 30°C.