Differences between ISO 25178 and JIS B 0601-2001
The chart below summarises the differences between ISO 25178 and JIS B 0601-2001/JIS B 0671-2002.
Item / Standard | ISO 25178 | JIS B 0601-2001 (ISO 13565-1) |
||
---|---|---|---|---|
Instruments | Contact type and non-contact type measuring instruments | Contact type (stylus method only) |
||
Cross-section | Evaluation target | S-F surface | Cross-sectional profile | |
Filter | S-filter | λs filter | ||
Roughness | Evaluation target | S-L surface | Roughness profile | |
Filter | S-filter, L-filter | λs filter, λc filter | ||
Height parameters | Maximum peak height | Sp | Rp | |
Maximum pit height | Sv | Rv | ||
Maximum height | Sz | Rz | ||
Arithmetical mean height | Sa | Ra | ||
Root mean square height | Sq | Rq | ||
Skewness | Ssk | Rsk | ||
Kurtosis | Sku | Rku | ||
Spatial parameters | Sal, Str, Std | – | ||
Hybrid parameters | Sdq, Sdr | RΔq |
Item / Standard | ISO 25178 | JIS B 0671-2002 (ISO 13565-1998) |
||
---|---|---|---|---|
Roughness | Function parameters | Level difference on core surface | Sk | Rk |
Reduced peak height | Spk | Rpk | ||
Reduced valley depth | Svk | Rvk | ||
Peak material portion | Smr1 | Mr1 | ||
Valley material portion | Smr2 | Mr2 |
[Caution] The above chart is created based on the definitions of Surface Texture parameters specified in ISO 25178-2:2012. Please note that the above information may be changed via standard revisions after April 2012.