ISO Standards ISO 556-2020 pdf free download – Coke (greater than 20 mm in size) — Determination of mechanical strength ISO 556-2020 pdf free download - Coke (greater than 20 mm in size) — Determination of mechanical strength. lf necessary, continue to filter the coke on sieves of larger aperture, e.g. 120 mm, 150 mm, until lessthan... 02-10 Download Now