34CrAlNi7 (1.8550)
EN 10085
Quenced Tempered (+QT) / Stabilized (+SR)
PROPERTIES AND EMPLOYEMENTS
THIS STEEL HAS AN ELEVATED HARDENABILITY, DISCREET TOUGHNESS AND IT IS SUITABLE FOR THE CONSTRUCTION OF BIG PARTS THAT ARE SUBMITTED TO ELEVATED DYNAMIC STRESSES. IT HAS THE BEST MACHINABILITY AMONG NITRIDING STEELS THAT CONTAIN ALUMINIUM. FOR THIS REASON IT IS PREFERRED OVER OTHER NITRIDING STEELS, BECAUSE AN ESSENTIAL CHARACTERISTIC IS THE TOUGHNESS OF NITRITED LAYERS AT ELEVATED HARDNESS (GUARANTEED BY ALUMINIUM)
CORRESPONDENCE TO INTERNATIONAL DESIGNATIONS
| QUALITY | EUROPE | GERMANY | FRANCE | SPAIN | G.B. | USA | |
|---|---|---|---|---|---|---|---|
| EN | DIN | W.n. | AFNOR | UNE | B.S. | AISI/SAE | |
| 34CrAlNi7 | 34CrAlNi7-10 | 34CrAlNi7 | 1.8550 | K52440 | |||
CHEMICAL COMPOSITION % (EN 10085)
| STEEL DESIGNATION | CHEMICAL COMPOSITION | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| SYMBOLIC | NUMERIC | C | Si max | Mn | P max | Sb max | Al | Cr | Mo | Ni | V |
| 34CrAlNi7-10 | 1.8550 | 0,30 ÷ 0,37 | 0,40 | 0,40 ÷ 0,70 | 0,025 | 0,035 | 0,80 ÷ 1,20 | 1,50 ÷ 1,80 | 0,15 ÷ 0,25 | 0,85 ÷ 1,15 | - |
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 | |||||||
| 34CrAlNi7-10 | 1.8550 | 680 | 900 to 1100 |
10 | 30 | 650 | 850 to 1050 |
12 | 30 | 600 | 800 to 1000 |
13 | 35 | 600 | 800 to 1000 |
13 | 35 | 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 | |
| 34CrAlNi7-10 | 1.8550 | max | 60 | 59 | 58 | 57 | 56,5 | 56 | 55,5 | 55 | 53,5 | 52,5 | 51 | 49 | 47,5 |
| min | 49 | 48 | 47 | 46,5 | 45,5 | 44 | 43,5 | 42 | 39 | 37 | 35 | 34 | 33 | ||
USUALLY AVAILABLE on STOCK
| M.T. COLORATION | QUALITY | HEAT TREATMENT | SURFACE | DIAMETER (mm) |
|---|---|---|---|---|
 |
34CrAlNi7 | Quenched and tempered, stress relieved | rolled peeled | 50-320 |
 |
Download technical sheet |