DIMO 2738 (EN 1.2738)

DIMO 2738 (EN 1.2738)

DIMO 2738 (EN 1.2738) introduction

DIMO 2738 is a prehardened CrMnNiMo-alloyed tool steel for the construction of plastic molds with superior surface
requirements on molds. It is characterized by excellent polishability, photoetchability, spark erosion behaviour and
dimensional stability as well as good machinability. DIMO 2738 shows a better through-hardening compared to
DIMO 2311.
DIMO 2738 is a modified version of 1.2738 according to Stahl-Eisen-Liste and of 40CrMnNiMo8-6-4 according to EN
ISO 4957. DIMO 2738 differs from 1.2311 according to Stahl-Eisen-Liste and from 40CMD8 according to NF A 35590
by a higher Ni-content of approximate 1 %.

Equivalent material: EN 1.2738, EN 40CrMnNiMo8-6-4, DIN 1.2738, DIN 40CrMnNiMo8-6-4

DIMO 2738 (EN 1.2738) general

Property Value Comment
Hardness, Brinell Hardness, Brinell of 280 - 325 [-] delivery condition
Tensile strength Tensile strength of 890 - 1030 MPa according to EN ISO 18265 table B2

DIMO 2738 (EN 1.2738) chemical

Property Value Comment
Carbon Carbon of 0.35 - 0.45 % limiting values
- Carbon of 0.4 % auxiliary data for 100 mm plate thickness
Chromium Chromium of 1.8 - 2.1 % limiting values
- Chromium of 1.9 % auxiliary data for 100 mm plate thickness
Iron -
Manganese Manganese of 1.3 - 1.6 % limiting values
- Manganese of 1.55 % auxiliary data for 100 mm plate thickness
Molybdenum Molybdenum of 0.15 - 0.25 % limiting values
- Molybdenum of 0.2 % auxiliary data for 100 mm plate thickness
Nickel Nickel of 0.9 - 1.1 % limiting values
- Nickel of 0.95 % auxiliary data for 100 mm plate thickness
Phosphorus Phosphorus of 0.015 % auxiliary data for 100 mm plate thickness
- Phosphorus of 0.025 % max. limiting values
Silicon Silicon of 0.2 - 0.4 % limiting values
- Silicon of 0.3 % auxiliary data for 100 mm plate thickness
Sulfur Sulfur of 0.001 % auxiliary data for 100 mm plate thickness
- Sulfur of 0.002 % max. limiting values
Vanadium Vanadium of 0.05 % auxiliary data for 100 mm plate thickness (alloyed depending on dimensions)

DIMO 2738 (EN 1.2738) electrical

Property - -
Application areas
Chemical composition
Delivery condtion
General note
Heat Treatment
Other Thickness ≥ 12 ≤ 130 mm ≥ 1/2 ≤ 5 in > 130 ≤ 165 mm > 5 ≤ 6.5 in
Width ≥ 1000 ≤ 2500 mm ≥ 40 ≤ 98.25 in ≥ 1000 ≤ 2050 mm ≥ 40 ≤ 80.5 in
Length ≥ 4500 ≤ 6000 mm ≥ 117.5 ≤ 236 in ≥ 4000 ≤ 6000 mm ≥ 157.5 ≤ 236 in

DIMO 2738 (EN 1.2738) mechanical

Property Temperature Value Comment
Coefficient of thermal expansion - Coefficient of thermal expansion of 1.19e-05 1/K 20-100 °C
- - Coefficient of thermal expansion of 1.25e-05 1/K 20-200 °C
- - Coefficient of thermal expansion of 1.31e-05 1/K 20-300 °C
- - Coefficient of thermal expansion of 1.36e-05 1/K 20-400 °C
- - Coefficient of thermal expansion of 1.41e-05 1/K 20-500 °C
- - Coefficient of thermal expansion of 1.41e-05 1/K 20-600 °C
Specific heat capacity - Specific heat capacity of 460 J/(kg·K) -
Thermal conductivity 20 °C Thermal conductivity of 34 W/(m·K) -
- 100 °C Thermal conductivity of 32 W/(m·K) -
- 200 °C Thermal conductivity of 33 W/(m·K) -
- 300 °C Thermal conductivity of 34 W/(m·K) -
- 400 °C Thermal conductivity of 34 W/(m·K) -

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