1. Scope

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.

1.2 The maximum thickness or weight [mass] of plates shall be as follows:

1.3 If the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized.

1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text the SI units are shown in brackets. The values stated in each system are not exact equivalents, therefore, each system is to be used independently of the other without combining values in any way.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

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

Keywords

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 Code

ICS Number Code 47.020.05 (Materials and components for shipbuilding)

DOI: 10.1520/A0945_A0945M-06

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