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3732 boiler steel plate hardness products are offered for sale by suppliers on Alibaba.com, of which hot rolled steel products accounts for 36%, steel sheets (old) accounts for 15%, and cold rolled steel products accounts for 6%. A wide variety of boiler steel plate hardness options are available to you, such as construction, ship plate and container plate.You can also choose from astm, jis and gb boiler steel plate hardness,as well as from bending, welding, and punching boiler steel plate hardness, and whether boiler steel plate hardness is carbon steel, q235, or dx51d.