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Sverker 21 is a tool steel manufactured by Uddeholms AB. It is primarily used for Cold Work applications such as blanking, piercing, cropping, bending, forming and cutting. It's a proprietary equivalent to D2 [tool steel].
ISO 18265: "Metallic materials — Conversion of hardness values" (2013) ASTM E140-12B(2019)e1: "Standard Hardness Conversion Tables for Metals Relationship Among Brinell Hardness, Vickers Hardness, Rockwell Hardness, Superficial Hardness, Knoop Hardness, Scleroscope Hardness, and Leeb Hardness" (2019)
AMPCO METAL is a diversified speciality alloy engineering company working primarily in copper based alloys, non-sparking safety tools and speciality welding products. The Switzerland based company is a manufacturer of engineered alloys of different compositions and properties, intended for specific uses in the aerospace, automotive, energy conservation, manufacturing and other industries.
Unsourced material may be challenged and removed. Find sources: "Hardnesses of the elements" data page – news · newspapers · books · scholar · JSTOR ( June 2022 ) ( Learn how and when to remove this message )
Many material or standard specifications include a number of different UNS numbers that may be used within that specification. For example: UNS S30400 (SAE 304, Cr/Ni 18/10, Euronorm 1.4301 stainless steel) could be used to make stainless steel bars ( ASTM A276 ) or stainless steel plates for pressure vessels ( ASTM A240 ) or pipes ( ASTM A312 ).
Where x is the material type (only 1 is specified so far), yy is the steel group number (specified in EN10027-2) and zz(zz) is a sequential number designated by the certifying body, the number in brackets being unused but reserved for later use. The steel groups are indicated below:
In addition, chemical compatibility refers to the container material being acceptable to store the chemical or for a tool or object that comes in contact with a chemical to not degrade. For example, when stirring a chemical, the stirrer must be stable in the chemical that is being stirred. Many companies publish chemical resistance charts.
C95400 defines an alloy, a range of material compositions, which Ampco 18 meets. So Ampco 18 is an example of a C95400 alloy which nominally meets the properties of Ampco 18. (Without guarantees, since Ampco only offers nominal properties.)--Yannick 00:46, 30 October 2007 (UTC) I see a logical flaw in the statement "UNS C95400 is Ampco 18".