GG25 is the most commonly used cast iron alloy. This material offers a good combination of strength and abrasion resistance, but is still easy to machine and can be finished to a high standard. It is a lamellar cast iron with a predominantly pearlitic structure. Heat treatment to increase hardness is not recommended.
GG25 is similar to GG20, but – due to the slightly finer structure – offers a higher tensile strength. This makes it suitable for machine components that are subjected to higher mechanical stresses.
|EN 1561 SYM (EU)||EN-GJL-250|
|EN 1561 NR (EU)||EN-JL1040|
|DIN 1691 (DE)||GG25|
|ASTM A48 (US)||40 B|
|ALT||GG 25, GG-25|
|Tensile strength||σ B||250||[N/mm2]|
|Permanent limit of elongation||σ bB||450||[N/mm2]|
|Compressive Strength||σ dB||950||[N/mm2]|