41CrAlMo7-10 (1.8509)
EN 10085
Hardening Tempering Stabilized (+QT +SR)
PROPERTIES AND EMPLOYEMENTS
41CrAlMo7-10 HAS AN ELEVATED HARDENABILITY AND A HIGH CARBON CONTENT THAT MAKE IT SUITABLE FOR THE CONSTRUCTION OF BIG PARTS, WHICH ARE SUBMITTED TO ELEVATED PULSING AND DYNAMIC STRESSES. ALUMINIUM CONFERS IT AN ELEVATED HARDNESS AT THE NITRITED STATE, EVEN IF IT REDUCES THE STEEL'S TOUGHNESS. THIS STEEL HAS A MORE DIFFICULT MACHINABILITY THAT CAN BE IMPROVED BY TAKING CARE OF THE INCLUSIVE RATE AND THE MICRO-STRUCTURE OF STEEL.
CORRESPONDENCE TO INTERNATIONAL DESIGNATIONS
| QUALITY | EUROPE | GERMANY | FRANCE | SPAIN | G.B. | USA | |
|---|---|---|---|---|---|---|---|
| EN | DIN | W.n. | AFNOR | UNE | B.S. | AISI/SAE | |
| 41CrAlMo7-10 (LK3) | 41CrAlMo7 | 41CrAlMo7 | 1.8509 | 40CAD6.12 | F1740 | 905M39 | |
CHEMICAL COMPOSITION % (EN 10085)
| STEEL DESIGNATION | CHEMICAL COMPOSITION | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| SYMBOLIC | NUMERIC | C | Si max | Mn | P max | Sb max | Al | Cr | Mo | Ni | V |
| 41CrAlMo7-10 | 1.8509 | 0,38 ÷ 0,45 | 0,40 | 0,40 ÷ 0,70 | 0,025 | 0,035 | 0,80 ÷ 1,20 | 1,50 ÷ 1,80 | 0,20 ÷ 0,35 | - | - |
CONCENTRATION LIMITS OF THE ELEMENTS THAT ARE NOT INDICATED IN THE TABLE CAN BE DEDUCED IN THE EN 10020 REGULATION.
MECHANICAL CHARACTERISTICS (EN 10085)
| STEEL | 16mm < d ≤ 40mm | 40mm < d ≤ 100mm | 100mm < d ≤ 160mm | 160mm < d ≤ 250mm | HV1b | |||||||||||||
| SYMBOLIC | NUMERIC | Re min | Rm | A min | KV min | Re min | Rm | A min | KV min | Re min | Rm | A min | KV min | Re min | Rm | A min | KV min | |
| N/mm2 | % | J | N/mm2 | % | J | N/mm2 | % | J | N/mm2 | % | J | |||||||
| 41CrAlMo7-10 | 1,8509 | 750 | 950 to 1150 |
11 | 25 | 720 | 900 to 1100 |
13 | 25 | 670 | 850 to 1050 |
14 | 30 | 625 | 800 to 1000 |
15 | 30 | 950 |
JOMINY HARDENABILITY (EN 10085)
| 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 | |
| 41CrAlMo7-10 | 1,8509 | max | 60 | 60 | 59,5 | 59,5 | 59 | 59 | 58,5 | 58 | 57 | 56,5 | 55 | 53 | 51 |
| min | 53 | 52 | 51 | 50 | 49 | 48 | 47,5 | 47 | 44,5 | 41 | 39,5 | 37,5 | 36 | ||
USUALLY AVAILABLE EX STOCK
| M.T. COLORATION | QUALITY | HEAT TREATMENT | SURFACE | DIAMETER(mm) |
|---|---|---|---|---|
 |
41CrAlMo7-10 | Quenched and tempered (+QT) Quenched and tempered stabilized (+QT +SR) |
rolled peeled forged turned |
20-300 300-520 |
 |
Download technical sheet |