This specification covers the standard for stainless steel floor plates for use in galley spaces, washrooms, engine rooms, and machinery spaces, and for ladder treads, gun platforms, and deck treads. Several steel grades like Type 304, 304L, 316, 316L used as floor plate material shall conform to the chemical composition requirements in carbon, manganese, phosphorus, sulfur, silicon, nitrogen, nickel, chromium, and molybdenum as determined by heat analysis. Annealing shall be the last heat treatment to which the material is subjected. The stainless steel floor plate shall be in patterns with uniform pitch from center to center, angular figures shall be arranged such that they are in angular position from a vertical or horizontal line and shall have a raised figure. Mechanical properties shall be tested by two longitudinal cold bend tests and the raised figure shall not fracture nor develop cracks or flaws on the materials. Magnetic permeability test shall also be performed on the plates and shall meet the specified magnetic permeability indicator. Floor plates of stainless steel shall be uniform in quality and condition, and free of injurious defects that may detrimentally affect the suitability for the service for which they are intended.
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1.1 This specification covers stainless steel floor plates ½ in. and under for use in galley spaces, washrooms, engine rooms, and machinery spaces, and for ladder treads, gun platforms, and deck treads. For these uses, Patterns A, B, and C are considered interchangeable (see Fig. 1, Fig. 2, and Fig. 3).
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
FIG. 1 Pattern A (percent of reduction, 61 %)
FIG. 2 Pattern B (original of raised figures approximately 1¼ in., percent of reduction 61 %)
FIG. 3 Pattern C
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A340 Terminology of Symbols and Definitions Relating to Magnetic Testing
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
A700 Practices for Packaging, Marking, and Loading Methods for Steel Products for Shipment
MIL-STD-163 Preservation of Steel Products for Domestic Shipment (Storage and Overseas Shipment)
rolled floor plate; stainless steel; floor plates;
ICS Number Code 77.140.20 (Steels of high quality); 77.140.50 (Flat steel products and semi-products)
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