2017EN ISO 14271:2017 Resistance welding - Vickers hardness testing (low-force and microhardness) of resistance spot@ projection@ and seam welds
2011EN ISO 14271:2011 Resistance welding - Vickers hardness testing (low-force and microhardness) of resistance spot, projection, and seam welds (Incorporating corrigendum April 2012)
2001EN ISO 14271:2001 Vickers Hardness Testing of Resistance Spot@ Projection and Seam Welds (Low Load and Microhardness)