... 2.Certificate: ISO 9001:2008 3.all types heat resistant steel grate casting1, Material: Stainless steel, Carbon steel, ... Alloy steel, Heat resistant steel,Iron,Grey iron etc.2, Standard: ASTM, GB ... plant desulfurization dephosphorization equipment such as waste incinerator, heating furnace and sewage treatment equipment6). Inspection:mechanical property testing, ...