Standard Specifications Need Specific Terms and here its Description

This classified is for Plates (other than floor plates or coiled product), Flat hot, rolled steel

When ordered to weight:

•   Over 200 mm in width and 47.1 kg/m2 or heavier.
•   Over 1200 mm in width and 35.3 kg/m2 or heavier.

Coiled product is excluded from qualification to this specification until cut to length. Also Slabs, sheet bars, and skelp, aren't classed as plates although it fall in the previous size rang.

•   Structural Size Shapes: having at least one dimension of the cross section 75 mm or greater is rolled flanged sections.
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  Bar Size Shapes : having a maximum dimension of the cross section less than 75 mm is rolled flanged sections.
•   "W" Shapes: are symmetric flange shapes used as beams or a column that's inside flange surfaces is fundamentally parallel. A shape having fundamentally the same nominal weight and dimensions as a "W" shape but whose inside flange surfaces are not parallel may also be considered a "W" shape. That mean it must be same average flange thickness as the “w”
•   "HP" Shapes are flange shapes commonly used as bearing piles, its flanges, and webs are of the same nominal thickness, and the depth, width are fundamentally the same.
•   "S" Shapes are symmetric produced according to the dimensional standards adopted in 1896 by the Association of American Steel Manufacturers for American Standard beam shapes.
•   "M" Shapes are symmetric can't be classified as "W," "S," or "HP" shapes.
•   "C" Shapes are channels produced according to dimensional standards adopted in 1896 by the Association of American Steel Manufacturers for American Standard channels.
•   "MC" Shapes are channels can't be classified as "C" shapes.
•   "L" Shapes are equal-leg and unequal-leg angles.
•   Sheet Piling : Steel sheet piling consists of rolled sections that can be interlocked, forming a continuous wall when individual pieces are driven side by side.
•   Bars : Rounds, squares, and hexagons, of all sizes; flats over 5 mm in specified thickness, not over 150 mm in specified width; and flats over 6 mm in specified thickness, over 150 to 200 mm, in specified width.
• Exclusive : When used in relation to ranges, as for ranges of thickness in the tables of permissible variations in dimensions, the term is intended to exclude only the major value of the range.
•   Rimmed Steel: resulting in a case or rim of metal virtually free of voids, Steel containing sufficient oxygen to give a continuous evolution of carbon monoxide while the ingot is solidifying.
•   Semi-killed Steel : insufficiently deoxidized steel containing sufficient oxygen to form enough carbon monoxide during solidification to offset solidification shrinkage.
•   Capped Steel : Rimmed steel and the rimming action are limited by an early capping operation. Capping may be carried out mechanically by using a heavy metal cap on a bottle-top mold or it may be carried out chemically by an addition of aluminum or ferrosilicon to the top of the molten steel in an open-top mold.
•   Killed Steel : Steel deoxidized, either by addition of strong deoxidizing agents or by vacuum treatment, to reduce the oxygen content to such a level that no reaction occurs between carbon and oxygen during solidification.
•   Groupings for Tensile Properly Classification : In some of the material specifications, the tensile property necessities vary for different sizes of shapes due to mass effect, etc. For the expediency of those using the specifications, the various sizes of shapes have been divided into groups based on section thickness at the standard tension test location (webs of beams, channels, and zees; legs of angles; and stems of tees).
•   Mill Edge : The normal edge produced by rolling between horizontal finishing rolls. A mill edge doesn't conform to any definite contour. Mill edge plates have two mill edges and two trimmed edges.
• Universal Mill Edge : The normal edge produced by rolling between horizontal and vertical finishing rolls. Universal mill plates, sometimes designated UM Plates, have two universal mill edges and two trimmed edges.
•   Sheared Edge : The normal edge produced by sheared edge plates that are trimmed on all edges.
•   Gas Cut Edge : The edge produced by gas flame cutting.
•   Special Cut Edge : Usually the edge produced by gas flame cutting, involving special practices, such as pre-heating, post-heating, or both. In order to minimize stresses, avoid thermal cracking and reduce the hardness of the gas cut edge. In special instances, special cut edge may be used to designate an edge produced by machining.
•   Sketch : used to describe a form of plate, denotes other than rectangular, circular, or semi-circular. Sketch plates may be furnished to a radius or with four or more straight sides.

Manufacture

Unless it's specified in the material specification, the steel shall be made by the open-hearth, basic-oxygen, or electric-furnace process. Additional refining by vacuum-arc-remelt (VAR) or electro slag remelt (ESR) is permitted.

Plates are produced in either discrete cut lengths of flat product or from coils. Plates produced from coil means plates that have been cut to individual lengths from a coiled product and are furnished without heat treatment. Stress relieving is not considered to be a heat treatment.

Heat Treatment

When material is required to be heat treated, unless it's specified in the material specification, it may be performed by the manufacturer, processor, which shall be heat, treated as specified in the material specification. The purchaser may specify the heat treatment to be used if it's not in conflict with the requirements of the material specification. Or fabricator, it may be accomplished by heating uniformly for hot forming. And it shall not significantly exceed the normalizing temperature. When no heat treatment is required, the manufacturer or processor may, heat treat the plates by normalizing, stress relieving, or normalizing and then stress relieving to meet the material specification.

If approved by the purchaser, cooling rates faster than those obtained by cooling in air are allowable for amelioration of the toughness provided, and then the must be tempered in the temperature range from 595 to 705°C.

Chemical Analysis

An analysis of each heat must be made by the manufacturer to determine the percentage of elements like carbon, manganese, phosphorus, sulfur, and others specified or restricted by the applicable specification. And it shall be made from a test sample preferably taken during the pouring of the heat.

When vacuum-arc-remelting or electro slag remelting is used, a heat is defined as all the ingots remelted from a single primary melt. The heat analysis shall be obtained from one remelted ingot, or the product of one remelted ingot, of each primary melt, to meet the requirements of the material.

One test sample shall be taken from the product of each remelted ingot, if the heat analysis of the primary melt doesn't meet the heat analysis requirements of the material specification. In either way, the analyses obtained from the remelted material will confirm the heat analysis requirements of the applicable specification.

Metallurgical Structure

When a fine austenitic grain size is specified, the steel shall have a grain size number of 5 or finer as resolute by the McQuaid-Ehn test. Determination shall be done according to the Plate IV of Methods E 112, by carburizing for 8 h at 925°C. Congruence to this grain size of 70 % of the grains in the area analyzed shall compose the basis of acceptance. One test per heat shall be made.