This specification covers high-strength low-alloy structural steel plates intended for use in welded construction of naval ships where a savings in weight (mass) is important. The steel shall be made to fine grain practice. The plates shall optionally undergo heat treatment such as quenching or tempering to meet the requirements on mechanical properties such as yield point, yield strength, elongation, and Charpy V-notch impact, provided that the treatment be reported on the test report. The specimen shall undergo heat and product analyses and conform to the chemical composition values of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, copper, vanadium, columbium, aluminum, titanium, and nitrogen.
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1.1 This specification covers high-strength low-alloy structural steel plate intended for use in welded construction of naval ships where a savings in weight [mass] is important. Plates that conform to this specification offer improved weldability, formability, and toughness resulting from the specified alloying elements with limitations on carbon, sulfur, and residual element contents. Grades 50 and 65 may be provided as-rolled, control-rolled, thermo-mechanical control processed (including accelerated cooling), normalized, or quenched and tempered as required to meet the specified mechanical requirements.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A673/A673M Specification for Sampling Procedure for Impact Testing of Structural Steel
A700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment
E208 Test Method for Conducting Drop-Weight Test to Determine Nil-Ductility Transition Temperature of Ferritic Steels
as-rolled; high-strength; low-alloy; low-carbon; normalized; plate; quenched; restricted sulfur; ship applications; steel; structural applications; tempered; thermo-mechanical control processed (TMCP); weight; welded construction; Vacuum-arc remelt (VAR) process; Weight; Welded construction; As-rolled structural steel plate; Basic-oxygen steel; Electric-furnace steel; Electroslag remelt (ESR) process; High-strength structural steel--specifications; HSLA (high-strength low-alloy) steel plate--specifications; Improved formability steel; Low-alloy/carbon steel plate; Normalized steel; Open-hearth steel--specifications; Quenched and tempered steels (specifications); Restricted sulfur; Shipbuilding steel materials (plate); Structural steel (SS) plate--specifications; Tempered structural steel--specifications; Thermomechanical control process (TMCP);
ICS Number Code 47.020.05 (Materials and components for shipbuilding)
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