Scientific Tools

Hardness Conversion Calculator

ISO 18265 - For unalloyed steel, low-alloy steel and cast iron

Input Value

Conversion Results

Brinell (HB): -
Rockwell B (HRB): -
Rockwell C (HRC): -
Vickers (HV): -

Calculate Tensile Strength

Results

Tensile Strength (MPa): -

Note: Conversion is approximate. For unalloyed steel, Rm ≈ 3.5 × HB (MPa). Variations exist for different material types.

Reference Table (ISO 18265:2003)

HB HRC HRB HV Rm (MPa)
150-80155500
200-93210700
250-100260850
30032-3101000
35037-3601200
40042-4101400
45046-4601550

Note: Some conversions are approximate and material-dependent. "-" indicates no valid conversion for that scale.