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C105U | 1.1545 Material Datasheet

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Material Description

Material Number Material Name Material Number (single) Standard Scope Standard Status Country Predecessor VDA 231-106 classification Application temperature [°C]
1.1545 (DIN EN ISO 4957 : 2018-11) C105U 1.1545 DIN EN ISO 4957 : 2018-11 Supersedes DIN EN ISO 4957 : 2001-02 Valid Germany C105U 1.1.1 ≤ 200 1)
1) Remark: C105U is a water hardening (chill hardening) tool steel. It achieves in hardened condition at least 61 HRC. The steel shows a good toughness. Application: screw cutting tools, low-temperature impact cavities, extruding and punching tools, calliper, rock tools for hard stone, shear blades, extrusion dies and coining dies, punching dies, mandrels, drawing rings, breakdowns, impact hammer, planing tools, polishing roller.

Chemical Composition

C [%] Mn [%] P [%] S [%] Si [%] Remainder
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Material Compliance

REACh RoHS
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Mechanical Properties

Condition Temperature [°C] Hardness HB | HBW Hardness HRC
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Physical Properties

Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] Differential Coefficient of Thermal Expansion [10^-6*K^-1] Thermal Conductivity [W/(m*K)] Thermal Diffusivity [10^-6 m²/s] Specific Electrical Resistance [µΩm] Mean Specific Heat Capacity [kJ/(kg*K)] True Specific Heat Capacity [kJ/(kg*K)]
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Heat Treatment

Heat Treatment Step Temperature [°C] Medium
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Cross Reference

Material Name Country Standard
T10A China GB/T 1298 1)
T00103 China GB/T 1298 1)
C105U Europe EN ISO 4957
103T3 India IS 1570 : Part 6 1)
TC12 India IS 1570 : Part 6 1)
103T3 India IS 3748 1)
C105U International ISO 4957
SK105 Japan JIS G 4401 2)
STC105 South Korea KS D 3751 1)
U10A Russia GOST 1435 1)
У10A Russia ГОСТ 1435 1)
U11 Russia 1)
У11 Russia 1)
A686 Type W1 USA ASTM A686 3)
W1 USA AISI 1)
W110 USA SAE J 438 1)
T72301 USA UNS 1)
C 105 W1 Germany 1)
1) Source: Stahlschlüssel 2016, Verlag Stahlschlüssel Wegst GmbH, Marbach
2) Source: EN ISO 4957 : 2018-07
3) Source: Metals & Alloys in the Unified Numbering System, SAE/ASTM, 11th Edition, 2008

Producer/Supplier/Trade names

Tradename Supplier
K990 voestalpine High Perfomance Metals Deutschland GmbH, Düsseldorf 1)
Janus extra zähhart Dörrenberg Edelstahl GmbH, Engelskirchen 1)
LD Spezial zähhart Willy Haecker GmbH, Hückeswagen 1)
Best2 Hagenkötter GmbH & Co., Solingen 1)
1) Source: Stahlschlüssel 2016, Verlag Stahlschlüssel Wegst GmbH, Marbach