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BÖHLER M200
PLASTIC MOULD STEELS - HEAT TREATABLE STEELS AND PRECIPITATION HARDENING STEELSAvailable Product Shapes
Product Description
Large and medium-sized moulds for plastic processing, mould frames for the injection moulding and die casting industries, components for general mechanical engineering.
Properties
• Good toughness & ductility• Good wear resistance• Very good machinabilty• Good dimensional stability• Good polishability• No heat treatment necessary• Pre-paid
Applications
Chemical composition
C Si Mn S Cr Mo
0.40 0.40 1.50 0.08 1.90 0.20
Long Products Plates
Standard Parts (Molds, Plates, Pins, Punches)
Tool Holders (milling, drilling, turning & chucks)
General Components for Mechanical Engineering
Injection Molding Hotrunner systems
Material designation
1.2312 SEL
40CrMnMoS8-6 EN
~P20 AISI
voestalpine BÖHLER Edelstahl GmbH & Co KGwww.voestalpine.com/bohler-edelstahl
PLASTIC MOULD STEELS - HEAT TREATABLE STEELS AND
PRECIPITATION HARDENING STEELS
BÖHLER M200
Material characteristics
Etchabillity Grindability Machinability in as supplied condition
Polishability Through hardenability
Toughness Wear resistance
Delivery condition
Hardened and Tempered
Hardness 290 - 330 HB
Heat treatment
Normalizing
Temperature (°C / °F)
850 / 1562 - 900 / 1652
Slow controlled cooling in furnace at a rate of 50 to 68°F/hr (10 to 20°C/hr) down to approx. 1112°F (600°C), further cooling in air.
Stress relieving
Temperature (°C / °F) 600 / 1112
In hardened and tempered condition approx. 86 to 122°F (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 furnance.
Hardening and Tempering
Temperature (°C / °F)
840 / 1544 - 860 / 1580
1544 to 1580°F (840 to 860°C) / oil 1580 to 1616°F (860 to 880°C) / air After through soaking, hold for 15 to 30 minutes. After hardening, tempering to the desired working hardness, see tempering chart.
BÖHLER M200
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voestalpine BÖHLER Edelstahl GmbH & Co KGwww.voestalpine.com/bohler-edelstahl
PLASTIC MOULD STEELS - HEAT TREATABLE STEELS AND
PRECIPITATION HARDENING STEELS
BÖHLER M200
Continuous cooling CCT curves
Quantitative phase diagram
B... BainiteP... PearliteK... CarbideA... AusteniteM... Martensite
━━━━━ Water cooling- - - - - - Oil cooling- • - Air cooling
1... Edge or face2... Core3... Jominy test: distance from the face end
voestalpine BÖHLER Edelstahl GmbH & Co KGwww.voestalpine.com/bohler-edelstahl
PLASTIC MOULD STEELS - HEAT TREATABLE STEELS AND
PRECIPITATION HARDENING STEELS
BÖHLER M200
Tempering chart
Surface treatment
Hardening temperature: 850°CSpecimen size: square 50 mm.
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
voestalpine BÖHLER Edelstahl GmbH & Co KGwww.voestalpine.com/bohler-edelstahl
M200 EN – 11.2021
PLASTIC MOULD STEELS - HEAT TREATABLE STEELS AND
PRECIPITATION HARDENING STEELS
BÖHLER M200
Physical Properties at 20°C / 68°F
Thermal Expansions
Temperature (°C / °F) 100 / 212 200 / 392 300 / 572 400 / 752 500 / 932
Thermal expansion (10⁻⁶ m/(m.K) / 10⁻⁶ inch/(inch.F)) 12.8 / 7.111 13 / 7.222 13.8 / 7.667 14 / 7.778 14.2 / 7.889
For more information see www.voestalpine.com/bohler-edelstahl
Density 7.85 / 0.28 [kg/dm³ / lb/in³]
Thermal conductivity 33 / 19.07 [W/(m.K) / BTU (IT) ft/hr/ft²/F]
Specific heat 460 / 109.87 [J/(kg.K) / BTU (IT) lb/F]
Spec. electrical resistance 0.19 / <0.001 [Ohm.mm²/m / Ohm.inch²/ft]
Modulus of elasticity 210 / 30.46 [10³N/mm² / 10³ksi]
voestalpine BÖHLER Edelstahl GmbH & Co KGMariazeller Straße 25
8605 Kapfenberg, AT
T. +43/50304/20-0
www.voestalpine.com/bohler-edelstahl
