Information of Fe-base Ω101A Alloy

High chromium cast iron Ω101A developed by Shanghai Omega is mainly applied in the liners of extruder barrels. Its corresponding material number to the Company of Werner & Pfleiderer GMBH in Germany is 1.2292.2, which is also known as 043.

The high wear-resistant alloy Ω101A features a Fe-base plays a role in wear resistance thanks to the uniform distribution of silicon carbide, manganese carbide, chromium carbide, and other types of micro-carbides in the iron substrate.

The main chemical components of Ω101A alloy:
Fe C Cr Si Mn Mo V HRC
Bal 2.0～2.8 22.0～28.0 0.5～1.5 0.3～1.0 0.5～1.0 0.4～0.8 58~64

Our company takes advantage of PM-HIP technology in the production of our oval liners. HIP is a kind of high-temperature isostatic pressing molding method. The improved German highly wear-resistant powder material with low expansion at high temperature is filled into the mold cavity first. Then a hot isostatic processing furnace producing high temperature and pressure helps to crate an oval liner with high density and high wear resistance.

Ω101A has the steel content equivalent and the physical properties as that of high-wear white cast iron KmTBCr26. It’s other physical properties are as follows:
  • The average of the Macro-hardness annotation of the Oval liner with Ω101A alloy is HRC58~64.
  • Intensity of tension: ≥350MPa
  • Breaking Strain: 0.03%
  • Melting range: 2020 ~ 2060°F
  • Density: ≥ 7.50g / cm3
  • Microstructure
    Under-cast, it is eutectic carbide M7C3 + austenite; in the hardened state it is the eutectic carbide M7C3 + secondary carbide + fine needle-like tempered martensite + residual austenite (the Chinese letter M is on behalf of Fe, Cr and other metal atoms, C on behalf of carbon atoms).
  • Thermal expansion coefficient
It is quite different from the average medium-carbon alloy steel. Average medium-carbon steel and its thermal coefficient of thermal expansion is proportional to the temperature, while the performance of alloy material 101A is to the contrary. It has an inversely proportional relationship between temperature and its heat. [JB1] Experimental analysis of the average coefficient of thermal expansion can be compared as follows:
Material Temperature Ω101A alloy Line Expansion Coefficient Ordinary Carbon Steel Linear Expansion Coefficient
15℃ ~ 250℃ Average 14.23×10-6/°F Average of 12.68×10-6/°F
15℃ ~ 400℃ Average 14.18×10-6/°F Average of 12.78×10-6/°F


The above products are manufactured through the PM-HIP technology is Constrained by the Werner & Pfleiderer GMBH company, so the specific material formula is not allowed to be released.

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