Uncompromising quality
Uncompromising quality
Uncompromising quality
Uncompromising quality
Uncompromising quality
Uncompromising quality
18CrNiMo7-6 (UNI EN 10084)
PROPERTIES AND EMPLOYEMENTS
IT IS A CASE-HARDENING STEEL THAT IS SIMILAR TO 17NICRMO6-4, BUT IT HAS A MORE ELEVATED HARDENABILITY, BECAUSE OF THE HIGHER CONTENT OF CHROMIUM AND MANGANESE. IT IS SUITABLE FOR THICK PARTS OR WITH AN ELEVATED DIAMETER, WHICH REQUIRE A HIGH RESISTANCE AND TOUGHNESS AT HEART, AFTER CASE-HARDENING, HARDENING AND STRESS RELIEF TEMPERING.
CORRESPONDENCE TO INTERNATIONAL DESIGNATIONS
| QUALITY | EUROPE | GERMANY | FRANCE | SPAIN | G.B. | USA | |
|---|---|---|---|---|---|---|---|
| EN | DIN | W.n. | AFNOR | UNE | B.S. | AISI/SAE | |
| 18CrNiMo7-6 | 18CrNiMo7-6 | 1.6587 | |||||
CHEMICAL COMPOSITION % (EN 10084)
| STEEL DESIGNATION | CHEMICAL COMPOSITION | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| SYMBOLIC | NUMERIC | C |
Si max |
Mn |
P max |
S max |
Cr | Mo | Ni | B |
| 18CrNiMo7-6 | 1,6587 | 0,15 ÷ 0,21 | 0,40 | 0,50 ÷ 0,90 | 0,035 | 0,035 | 1,50 ÷ 1,80 | 0,25 ÷ 0,35 | 1,40 ÷ 1,70 | - |
CONCENTRATION LIMITS OF THE ELEMENTS THAT ARE NOT INDICATED IN THE TABLE CAN BE DEDUCED IN THE EN 10020 REGULATION. IT CAN BE PROVIDED WITH AN ADDITION OF LEAD 0,12-0,35% OR SULPHUR CONTROLLED UP UNTIL 0,40% FOR AN IMPROVED MACHINABILITY.
JOMINY HARDENABILITY (EN 10084)
| STEEL DESIGNATION | RANGE LIMITS | HRC HARDNESS MEASURED FROM THE QUENCHED END OF THE TEST TUBE (MM) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SYMBOLIC | NUMERIC | 1,5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | |
| 18CrNiMo7-6+H | 1,6587 | max | 48 | 48 | 48 | 48 | 47 | 47 | 46 | 46 | 44 |
43 |
42 | 41 | 41 |
| min | 40 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 32 | 31 | 30 | 29 | 29 | ||
USUALLY AVAILABLE EX STOCK
| M.T. COLORATION | QUALITY | HEAT TREATMENT | SURFACE | DIAMETER(mm) |
|---|---|---|---|---|
| 18CrNiMo7-6 | Soft-annealed |
rolled forged turned |
30-300 310-520 |
 |
Download technical sheet |
Steels
Our steel always comes from the same European steelworks, which guarantee a continuity for what concerns quality. The constant quality of the supplies allows to have repetitive parameters in mechanical processing and a greater control over deformations during heat treatment.
Machining
Precise cuttings of small and big series are guaranteed by the employement of latest generation automatic saws that were projected and realized in order to guarantee precision standards required by customers, reducing processing wastage.
Quality
The certification and introduction of the Quality System management allowed M.T.Acciai to improve not only its efficiency, but also the quality that is offered, in order to better meet our customers’ needs.