Maraging Steel


Maraging Steel

Parts built in Maraging Steel have a chemical composition corresponding to US classification 18% Ni Maraging 300, European 1.2709 and German X3NiCoMoTi 18-9-5. This kind of steel is characterized by having very good mechanical properties, and being easily heat-treatable using a simple thermal age-hardening process to obtain excellent hardness and strength. Parts built from Maraging Steel are easily machinable after the building process and can be easily post-hardened to more then 50 HRC by age-hardening at 490 °C (914 °F) for 6 hours. In both as-built and age-hardened states the parts can be machined, spark-eroded, welded, micro shot-peened, polished and coated if required.

Mechanical Properties Test Method As Built Heat Treated
Tensile strength ISO 6892-1:2009(B) Annex D 1100 ± 100 MPa Min. 1950 MPa
Yield Strength (Rp 0.2%) ISO 6892-1:2009(B) Annex D 1050 ± 100 MPa Min. 1875 MPa
Elongation at Break ISO 6892-1:2009(B) Annex D 10 ± 4% Min. 2%
Young’s modulus - 160 ± 20 GPa 180 ± 20 GPa
Hardness DIN EN ISO 6508-1 33 -37 HRC 50 - 55 HRC
Thermal Properties Test Method As Built Heat Treated
Max. Operating Temp. ASTM E1461-13 Approx. 400 °C Approx. 400 °C
Specific heat capacity ASTM E1461-13 450 ± 20 J/Kg°C 450 ± 20 J/Kg°C
Chemical Composition and Physical Properties    
Chemical composition Fe
Ni
Co
Mo
Ti
Al
Cr/Cu
C
Mn/Si
P/S
Balance (> 58%)
17 - 19%
8,5 -9,5%
4,5 - 5,2%
0,6 - 0,8%
0,05 - 0,15%
≤ 0,5%
≤ 0,03%
≤ 0,1%
≤ 0,01%
Physical Properties Relative density Approx. 99,99 %
  Density 8,1 g/cm3
Heat Treatment Temperature Time (h) Atmosphere
Precipitation Hardening RT - 490°C 5,5 Inert
  490°C 6-10 Inert
  490°C - RT - Inert