Steel Hardness Test Results

Simply put the rockwell hardness test is a method of measuring the hardness of materials.

Steel hardness test results. It uses a bullet shaped or cone shaped penetrating body. There are different scales denoted by a single letter that use different loads or indenters. Test forces range from 500 to 3000 kgf. It s most commonly used to check the hardness of steel that s been heat treated.

Hardness symbol indenter type total test forcef n kgf hardness range applications. 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. Pick out the penetrator. The rockwell scale is a hardness scale based on indentation hardness of a material.

Therefore it is limited in its usefulness. In a rockwell test hardness is interpreted as resistance to local penetration. How to use a rockwell testing machine. Hard alloy carbide shallow case hardening steel and etc.

The term brinelling has come to mean the permanent indentation of any hard surface. The brinell hardness value of steel forgings will be shown in hb. When measuring a forged steel a 500kg load is used along with a sphere of 10mm. The rockwell hardness scale is typically administered to characterize the hardness of metals such as thin steel cemented carbides lead aluminum zinc copper alloys titanium and iron but the scale is also administered to test certain plastics.

The acronym bhn is used to show a brinell hardness number. Usually soft materials like 1018 mild steel will use the rockwell b scale which makes use of a 1 16 rounded steel penetrator with a 100 kg major load. A chart is then used to convert the averaged diameter measurement to a brinell hardness number. It is defined as the resistance to indentation and it is determined by measuring the permanent depth of the indentation.

A brinell hardness result measures the permanent width of indentation produced by a carbide indenter applied to a test specimen at a given load for a given length of time. The brinell test was the first widely used standardised steel hardness test. Steel hardness conversion table. This table shows approximate hardness of steel using brinell rockwell b and c and vickers scales.

The right hand column show an approximate equivalent tensile strength.