As a quality chrome moly steel, A387 Grade 11 Class 2 is used in a variety of industries and is highly effective, particularly in the oil, gas and chemical industry, where liquids and gases are often stored at high temperature (see pressure vessels). The higher levels of chromium also provide excellent corrosion and oxidation resistance.
FHWA Bridge Inspector's Manual Section 2.3 and 2.4 2.3.1 Topic 2.3 Steel 2.3.1 Introduction Steel is a widely used construction material for bridges due to its strength, relative ductility, and reliability. It is found in a variety of members on a large number of bridges. Therefore, the bridge inspector should be familiar with the various
M270 vs. A709:Grade Comparison Leeco Steel, LLCOct 13, 2020 · Both M270 and A709 have weathering grades represented by a W, as with A709 Grade 50W which contain additional alloys that help them better endure extreme weather conditions. A709 also has high-performance standard (HPS) grades, which offer a balance of strength, weldability, corrosion resistance and ductility.