... to high temperature and anti-corrosion characteristics from Haverer ASTM SA387 Grade 91 Class 2 carbon alloy steel plate is good ... gas industry.Due to the materials excellent corrosion resistant properties, SA387 Grade 91 is also an option for use in sour ... *6000, etc. according to your order, min order: 10ton of SA387 Gr 91. steel plate S387 Gr 91