A387 Grade 12 Class 2 steel can be used in high temperature environment of industrial boiler and pressure vessel manufacturing industry, the steel contains more molybdenum chromium element, which makes the ASTM A387 Grade 12 Class 2 has slight corrosion resistance, although compared with stainless steel, corrosion resistance seem a bit small, but compared with other types of steel is more durable, economical and practical. This is one of the reasons why ASTM A387 Grade 12 Class 2 steel is so popular. A387 Grade 12 Class 2 pressure vessel plate specification: Shapes: plates, sheet, steel strips, angle, channel and round bar Thickness : 1.5-200mm Width: 1220-4200mm Length : 5000-18000mm Notes: coil thickness â?¤ 25mm Why Choose BBN Steel? 1. Competitive price and quality from our own factory 2. Approved by ISO9001, CE, SGS every year 3. Best online service with 24 hours reply 4. Deep processing service: cutting, welding, drilling, grinding, turning 5. Smooth production ability (3000tons/month)