ISO 4507:1978 Sintered ferrous materials, carburized or carbonitrided; Determination and verification of effective case depth by the Vickers microhardness testing method
2000ISO 4507:2000 Sintered ferrous materials, carburized or carbonitrided - Determination and verification of case-hardening depth by a micro-hardness test
1978ISO 4507:1978 Sintered ferrous materials, carburized or carbonitrided; Determination and verification of effective case depth by the Vickers microhardness testing method