Steel Hardness Test

Steel hardness conversion table.

Steel hardness test. Within a few seconds the force is built up and maintained for a period of between 10 and 15 seconds. Hard alloy carbide shallow case hardening steel and etc. Hardness testing is appropriate for use with tool and die components where resistance to indentation can help judge one of the potential component failure modes. Hardness is a characteristic of a material not a fundamental physical property.

The right hand column show an approximate equivalent tensile strength. Measure the impression with the 20x microscope and use the computing disc to determine hardness. The hardness of steel is important to many processes. The rockwell scale is a hardness scale based on indentation hardness of a material.

These conversion charts are provided for guidance only as each scales uses different methods of measuring hardness. A steel ball will make an impression. When stamped sheet metal fails it is usually unrelated to the degree to which it can handle a hard ball. In engineering steel hardness is important because the inherent resistance of the surface to withstand friction or erosion by oil steam and water typically increases with the relative hardness of steel.

The rockwell test measuring the depth of penetration of an indenter under a large load major load compared to the penetration made by a preload minor load. In this hardness test a diamond pyramidal penetrating body with a top angle of 136 is pressed into the steel forging part with a given force f. Hardness symbol indenter type total test forcef n kgf hardness range applications. In this test c scale a diamond cone is used as an indenter and the measure considered to calculate the hardness number is the penetration of the indenter.

The most common scales used to test stainless steel hardness are the b and c scales the latter usually used for hardened stainless steels. To use slide a test bar into the tester place the tester on your surface and hit with a hammer. Determine the hardness of very hard steel. This table shows approximate hardness of steel using brinell rockwell b and c and vickers scales.

There are different scales denoted by a single letter that use different loads or indenters. It is defined as the resistance to indentation and it is determined by measuring the permanent depth of the indentation.