17CrNi6-6, 1.5918, 15CrNi6, 1.5919 - alloy steel for carburizing for loaded gears in accordance with EN 10084, DIN 17115.
| Standard | Steel Grade | ||||||
|---|---|---|---|---|---|---|---|
| Chemical composition % | |||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | |
| PN | 15HN | ||||||
| 0.12 - 0.18 | 0.4 - 0.7 | 0.17 - 0.37 | <0.035 | <0.035 | 1.4 - 1.7 | 1.4 - 1.7 | |
| EN | 17CrNi6-6 - 1.5918 | ||||||
| 0.14 - 0.20 | 0.5 - 0.9 | <0.4 | <0.025 | <0.035 | 1.4 - 1.7 | 1.4 - 1.7 | |
| NF | 16NC6 | ||||||
| 0.12 - 0.17 | 0.6 - 0.9 | 0.1 - 0.4 | <0.035 | <0.035 | 0.9 - 1.2 | 1.2 - 1.5 | |
| DIN | 15CrNi6 - 1.5919 - 1.6757 | ||||||
| 0.14 - 0.19 | 0.4 - 0.6 | <0.4 | <0.035 | <0.035 | 1.4 - 1.7 | 1.4 - 1.7 | |
| EN | 14NiCr6 | ||||||
| 0.11 - 0.17 | 0.35 - 0.65 | 0.15 - 0.40 | <0.035 | <0.035 | 1.4 - 1.7 | 1.4 - 1.7 | |
Specification and application
Steel used mainly in the engineering industry for medium sized, heavily loaded components requiring high surface hardness. The chemical composition is similar to the 17HNM, 18CrNiMo7-6, 1.6587 grades. It is distinguished by a slightly lower carbon content and the absence of Molybdenum. Products made of 15HN steel and its substitutes are used in the production of gears, pivots, transmissions or shafts of machines, cars and engines requiring high ductility, abrasion resistance, variable loads and impact resistance during continuous operation.
General mechanical properties of 15HN polish grade:
- Tensile strength, Rm >980 MPa
- Yield strength, Re: >830 MPa
- Elongation, A: >12%
- Necking, Z: >45%
- Impact energy, KU2: >64 J
- Hardness in annealed condition, <217 HB
General mechanical properties for hot-rolled bars 17CrNi6-6, 1.5918 in accordance with EN 10084:
- Hardness in delivery condition +A: <229 HBW
- Hardness in delivery condition +TH: 175 - 229 HBW
- Hardness in delivery condition + FP: 156 - 207 HBW
- Hardness in delivery condition +S: <255 HBW
Mechanical properties of 17CrNi6-6 (ZF1) for wire and cold extrusion wire rod and wire rod for pressing in accordance with EN 10263-3
- Delivery condition +AC:
- Tensile strength, Rm < 600 MPa
- Necking, Z: >60%
- Delivery condition +FP:
- Hardness: 156 - 207 HB
- Delivery condition +U+C+AC:
- Tensile strength, Rm <580 MPa
- Necking, Z: >62%
- Delivery condition +U+C+AC+LC:
- Tensile strength, Rm < 620 MPa
- Necking, Z: >60%
- Delivery condition +AC+C
- Tensile strength, Rm < 710 MPa
- Necking, Z: >57%
Mechanical properties of standard 15CrNi6, 1.5919 according to DIN 17115:
- Tempered condition +QT
- Tensile strength, Rm >1050 MPa
- Yield strength, Re: >945 MPa
- Elongation, A: >10%
- Necking, Z: >50%
- Impact strength, KV: >60J
- Annealed condition +A - Hardness: <210 HBW
- Delivery condition +A+C - Hardness: <250 HBW
- Delivery condition +S - Hardness: <255 HBW
- Delivery condition +AC - Hardness: <180 HBW
- Delivery condition +AC+C - Hardness: <220 HBW
Heat treatment of 15HN steel:
- Softening annealing at a temperature of 650 - 700℃
- Normalization at 850 - 890℃
- Carburizing at 880 - 950℃
- Carbonitriding at 860 - 930℃
- Hardening I after carburizing in water/oil at 850 - 890℃
- Annealing after carburizing at 630 - 650℃
- Hardening II after carburizing in oil or water at 800 - 840℃
- Tempering at 170 - 200℃
Heat treatment of 17CrNi6-6, 1.5918 steel:
- Austenitisation at 870℃ for 30-35 minutes
- Carburizing at 880 - 980℃
- Hardening I at 830 - 870℃
- Hardening II at 780 - 820℃
- Tempering at 150 - 200℃ for 1 hour
In the above mentioned grades the company delivers:
Other designations of the grade:
15HNA, 15CrNi6, 1.5919, 15 CrNi 6, 14NiCr6, 17CrNi16, 17 CrNi 16, BNC5, 15Cr6Ni6, UNS H43200, UNS H43204, AISI 4320H, AISI 4320, AISI 3115, C5420, 17Х2ГН2, 17H2GN2, 16NiCr6, ZF1, 17CrNi6-6, 1.6757, 1.5918.