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The various types of non-alloyed steels, i.e. without the addition of alloy elements, differ from one another in particular due to the greater or lesser presence of carbon - the higher the carbon content, the greater the hardness of the steel in question after the quenching and tempering treatment. Non-alloyed quenched and tempered steels in any case have a limited temperability and do not allow, even when tempered in water, well-transformed structures to be obtained on pieces with elevated thickness
Product Code
KV20 R20Pb
Quality - Wr.N.
C22E - Nr.1.1151
Non-alloy steel with very low temperability, temperable only in water and used for simple and small pieces. Often used without the quenching and tempering treatment.
Product Code
KV30 R30S
Quality - Wr.N.
C30E - Nr.1.1178 C30R - Nr.1.1179
Non-alloy steel quenchable and temperable in water with higher carbon contents than KV20. Used for simple pieces of limited size.
Product Code
KV35 R35Pb
Quality - Wr.N.
C35E - Nr.1.1181 C35R - Nr.1.1180
Non-alloy steel quenchable and temperable in water, higher carbon content than the previous types. Widely used thanks to its slightly higher temperability.
Product Code
KV40 R40S R40Pb
Quality - Wr.N.
C40E - Nr.1.1186 C40R - Nr.1.1189
Non-alloy steel quenchable and temperable in water and oil, allows higher mechanical characteristics to be obtained. It is one of the most used steels in Europe.
Product Code
KV45 R45S R45PB
Quality - Wr.N.
C45E - Nr.1.1191 C45R - Nr.1.1201
Non-alloy steel, quenchable and temperable in water and oil. Pieces of a particular size with sufficiently transformed structures can be extracted. It is one of the most used steels in Europe.
Product Code
KV50 R50Pb
Quality - Wr.N.
C50E - Nr.1.1206
Non-alloy steel quenchable and temperable in oil, with high carbon levels, allows pieces with rather high hardness to be obtained. Also suitable for surface tempering.
Product Code
R55
Quality - Wr.N.
C55E - Nr.1.1203
The high carbon levels of this non-alloy quenched and tempered steel allow high hardness and transformed structures to be obtained even in pieces of considerable size. Often used for surface tempering.
Product Code
RE60S
Quality - Wr.N.
(E335+S) - Nr.(1.0060) (E335GC) - Nr.(1.0543)
Carbon steel derived from the E335 type of the standard EN 10025-2; the addition of sulfur confers greater machinability by chip removal. Not suitable for hardening heat treatments.
