Material Properties and Other Quality Terms

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Material Properties and Other Quality Terms

5101 Melting steel analysis value (cast analysis,ladle analysis)

The chemical composition of molten steel is the average chemical composition of molten steel. The chemical composition of steel is indicated by the molten steel analysis value (or Toribe analysis value).

5102 Product analysis

Analytical values performed on analysis samples taken from steel.

5103 Carbon equivalent

The influence of elements other than carbon is converted into the amount of carbon. JIS uses the following formula for weldability.
Carbon equivalent % = C + Mn/6 + Si/24 + Ni/40 + Cr/5 + Mo/4 + V/14

5210 Mechanical properties

Properties related to mechanical deformation and fracture, such as tensile strength, yield point, elongation, drawing, hardness, impact value, fatigue strength, and creep strength.

5220 Weldability

The degree to which the steel material is suitable for welding.

5231 Brittleness

Generally hard and brittle, with low deformation capacity. Usually compared to a larger or smaller impact value in an impact test or to a fracture surface condition.

5232 Toughness

Degree of tenacity and resistance to impact fracture.

5240 Workability

Degree of suitability for various types of processing for the intended use.

5241 Bendability

The degree to which it can be bent without cracking.

5242 Formability

Degree to which the material can be formed into the required shape without cracking.

5243 Deep drawability

The degree to which the material on the die surface can be drawn into the die hole. Depending on the degree, it is called drawability, deep drawability, or ultra-deep drawability.

5244 Combined formability

The degree to which combination forming such as deep drawing, overhang, elongation flange, and bending can be performed. For example, combined draw/stretch formability.

5245 Stretchability

The degree to which a flat plate or a portion of an already formed product can be bulged and extruded to form a predetermined shape and size.

5246 Non-aging properties

A property that does not change over time such that mechanical properties and workability are impaired in practical use. Generally, this property is required for cold-rolled steel sheet for deep drawing, and usually refers to a property that does not cause stretch strains during processing.

5247 Drawability

Ease of forming when drawing wire, bar, or pipe through a die hole. In general, a material is said to have good drawability when it is drawn to a specified cross-sectional shape without surface or internal cracking, and when the surface is well lubricated and no die cracks are formed on the surface.

5248 Machinability

The ease of cutting when cutting. It is expressed in terms of characteristics such as cutting resistance, life of the tool used, degree of cutting finish, and shape of cutting chips and difficulty of disposal.

5249 Drawability of as rolled wire rods

Drawability or drawability of wire rod when it is drawn as rolled without prior heat treatment.
Generally, it is expressed as follows: original cross-sectional area - cross-sectional area after drawing / original cross-sectional area × 100.
The ease with which a wire is drawn when drawn and the drawability of the wire are referred to as drawability.

5250 Cold headability

The ease of cold heading. Generally, when cold working is performed to a specified shape, the material is said to have good cold workability if it is free from stress cracking and has a good surface shape.

5261 Corrosion resistance

The property of resisting corrosive action in a given environment.

5262 Heat resisting properties

Properties with excellent oxidation resistance or high-temperature strength at high temperatures.

5263 Weather resistance (atmospheric corrosion resistance)

The property of low-alloy steels and other materials to resist corrosion in the atmosphere of their natural environment.

5264 Oxidation resistance

Property of resisting oxidation at high temperatures.

5265 Creep resistance

High-temperature creep is a phenomenon in which strain increases with time under a certain stress at high temperatures, and is a property of a material that can withstand this phenomenon.

5266 Acid resisting properties

Resistance to the corrosive action of acids.

5267 Corrosion resistance in sea water

Resistance to corrosive action in environments where it comes in contact with seawater.

5270 Wear resistance

Wear is a phenomenon in which a metal surface in relative motion is subjected to mechanical scratching, metallic adhesion, etc., which together cause wear and tear on the surface.

5280 Fatigue strength

The property of resisting fracture caused by repetitive stress.

5281 Thermal fatigue strength

The property of a material to withstand the fracture caused by repeated thermal stresses resulting from temperature changes, which is called thermal fatigue.

5290 Hardenability

Performance governing the ease of quenching, or the depth of quenching and distribution of hardness, when steel is quench hardened.
Hardenability is usually compared by the depth of hardening, for which the hardenability test method (one end hardening method) is conveniently used (see JIS G 0561). Other methods include the Shepherd P-F test and the SAC hardenability test.

5300 Magnetic properties

Magnetic properties that a magnetic material exhibits when it is magnetized. Generally, iron loss, flux density, permeability, coercive force, residual flux density, etc. are listed.

5321 mill edge

A type of edge of a steel plate or strip that has not been cut as the edge naturally formed by rolling.

5322 Cut edge

A type of edge of steel sheet or strip that is cut in the final process. Depending on the cutting method, it is sometimes referred to as a trimmed edge, slit edge, or shard edge.

5331 Standard tempering (-)

One of the tempering categories of cold-rolled steel sheet and strip, obtained by annealing followed by light cold rolling to obtain the appropriate shape, surface finish, mechanical properties, and workability for the intended use.

5332 Full hard

A cold-rolled steel sheet or strip that is cold-rolled after annealing to adjust hardness for workability other than drawability. There are 1/8 hard, 1/4 hard (quarter hard), 1/2 hard (half hard), and full hard according to hardness, bow strength, etc.

5341 Shot blasted surface

Shows the surface condition of the steel material, and the shot is projected at high speed and the surface of theMill scale (black skin)and rust, etc. removed.

5342 Pickled surface

Indicates the surface condition of steel, which has been immersed in sulfuric acid, hydrochloric acid, or other acid solution to remove scale, rust, etc. from the surface.

5343 Dull finish

The surface condition of cold-rolled steel sheet and strip, in which the cold-rolling rolls are uniformly roughened and the surface of the steel sheet is finished to a pear-like, non-glossy state. Also called nashiji finish or matte finish.

5344 Bright finish

The surface condition of cold-rolled steel sheet and strip, which is rolled with a polished cold-rolling roll to produce a smooth and shiny surface on the steel sheet.

5345 NO.1 finish

Surface finish condition of hot-rolled stainless steel sheets and strips, which are finished by heat treatment, pickling or equivalent treatment after hot rolling.

5346 NO.2D finish (No.2D finish)

The surface finish of cold-rolled stainless steel sheets and strips, which are finished by heat treatment, pickling, or equivalent treatment after cold rolling. Also included are those that have been cold rolled lightly at the end by a matte roll.

5347 NO.2B finish (No.2B finish)

Indicates the surface finish condition of cold-rolled stainless steel sheet and strip, which, after cold rolling, is subjected to heat treatment, pickling, or equivalent treatment, and then cold rolled to a degree that produces an appropriate luster.

5348 N0. 3 finish (No. 3 finish)

Indicates the surface finish condition of cold-rolled stainless steel sheet and strip, finished by polishing to No. 100 to No. 120 according to JISR6001.

5349 N0. 4 finish (No. 4 finish)

Indicates the surface finish condition of cold-rolled stainless steel sheet and strip, finished by polishing to No. 150 to 180 according to JISR6001.

5350 BA finish (bright annealed finish)

Shows the surface finish condition of cold-rolled stainless steel sheet and strip, which is finished by bright heat treatment after cold rolling.

5351 HL finish (hair line finish)

Indicates the surface finish condition of cold-rolled stainless steel sheet and strip, which is finished by polishing with abrasives of appropriate grain size to produce a continuous polished surface.

5361 Casting surface

Surface in rust free condition.black-dyed leatherAlso referred to as

5362 Extra meat (pads)

A part that is cast with an increase in wall thickness during forging for forgeability and is removed when the product is made.

5363 Forging ratio

The degree of deformation caused by forging operations. Generally, it is expressed as the ratio of the cross-sectional area before forging to the cross-sectional area after forging, accompanied by the work type symbol.

5364 Forging effect

The degree of toughening of a material, which is one of the purposes of forging (forming and material improvement). It is generally expressed in terms of forging/forming ratio and mechanical properties.

5401 Preferred size

Dimensions of steel materials that have been aggregated to some extent by taking into account actual use and standard sequences, etc.

5402 Constant length (-)

A dimension that is synonymous with the standard dimension, but is usually more consolidated than the standard dimension. For steel pipe, steel bar, and steel shapes, it is used only for length.

5501 Limited condition of surface imperfections to be removed

Limits on the depth, area, etc. of removal of defects present on the surface of steel. Also called the limit of care.

5502 Allowable impairments without repairing

Limits on the size, number, etc. of defects on the surface of steel that are not harmful in use and do not require removal.

5503 Allowable limit of imperfections after repairing

The limit on the size, number, etc., of defects in steel that are present after the defects have been removed and that are acceptable for use.

That's it.