L’ acciaio inox 17-4 è caratterizzato da elevate proprietà meccaniche e da un’ottima resistenza alla corrosione.
Questo materiale è ideale per la costruzione di accessori per la produzione (DirectPart) come prototipi funzionali in metallo, produzione di piccole serie, prodotti personalizzati o pezzi di ricambio. I componenti costruiti in acciaio inox 17-4 possono essere lavorati tramite saldatura, sottoposti a processo di elettroerosione a filo, micropallinatura ed essere lucidati se richiesto.
| Technical Data | Test Method | |
| Typical achievable part accuracy, small parts | - - - - - - - | approx. ±20-50 μm |
| Typical achievable part accuracy, large parts [1] | - - - - - - - | approx. ± 0.2 % |
| Min. wall thickness [2] | - - - - - - - | approx. 0.3 - 0.4 mm |
| Surface roughness[2] after shot-peening | - - - - - - - |
Ra 2.5 - 4.5 μm Ry 15 - 40 μm |
| Surface roughness after polishing | - - - - - - - | Rz up to < 0,5 μm |
| Physical and Chemical properties of parts | Test Method | |
| Material composition steel including alloying elements | - - - - - - - |
Cr (15 – 17.5 wt-%) Ni (3 - 5 wt-%) Cu (3 - 5 wt-%) Mn (max. 1 wt-%) Si (max. 1 wt-%) Mo (max. 0.5 wt-%) Nb (0.15 - 0.45 wt-%) C (max. 0.07 wt-%) |
| Relative density with standard parameters | - - - - - - - | approx. 100 % |
| Density with standard parameters | - - - - - - - |
min. 7.8 g/cm3 |
| Mechanical properties of parts [3] | Test Method | As Manufactured | Stress relieved (1 hour at 650 °C) |
| Ultimate tensile strength in horizontal direction (XY) | ISO 6892:1998(E) Annex C |
min 850 MPa (123 ksi) typical 930 ± 50 MPa (135 ± 7 ksi) |
typical 1100 MPa (160 ksi) |
| Ultimate tensile strength in vertical direction (Z) | ISO 6892:1998(E) Annex C |
min 850 MPa (123 ksi) typical 960 ± 50 MPa (139 ± 7 ksi) |
typical 980 MPa (142 ksi) |
| Yield strength, ReL, Lower yield strength) in horizontal direction (XY) | ISO 6892:1998(E) Annex C |
min 530 MPa (77 ksi) typical 586 ± 50 MPa (85 ± 7 ksi) |
typical 590 Mpa (86 ksi) |
| Yield strength, ReL, Lower yield strength) in vertical direction (Z) | ISO 6892:1998(E) Annex C |
min 530 MPa (77 ksi) typical 570 ± 50 MPa (83 ± 7 ksi) |
typical 550 MPa (80 ksi) |
| Yield strength, ReH, Upper yield strength) in horizontal direction (XY) | ISO 6892:1998(E) Annex C |
min 595 MPa (86 ksi) typical 645 ± 50 MPa (94 ± 7 ksi) |
typical 634 MPa (92 ksi) |
| Yield strength, ReH, Upper yield strength) in vertical direction (Z) | ISO 6892:1998(E) Annex C |
min 580 MPa (84 ksi) typical 630 ± 50 MPa (91 ± 7 ksi) |
typical 595 MPa (86 ksi) |
| Young’s modulus | ISO 6892:1998(E) Annex C | 170 ± 30 | typical 180 GPa |
| Elongation at break in horizontal direction (XY) | ISO 6892:1998(E) Annex C |
min 25 % typical 31 ± 5 % | typical 29 % |
| Elongation at break in vertical direction (Z) | ISO 6892:1998(E) Annex C | min 25 % typical 35 ± 5 % | typical 31 % |
| Hardness [4] as built | ISO 6892:1998(E) Annex C | approx. 230 ± 20 HV1 | - - - - - - - |
| Hardness [4] ground and polished [5] | ISO 6892:1998(E) Annex C | approx. 250 - 400 HV1 | - - - - - - - |
| Thermal properties of parts | Test Method | |
| Coefficient of thermal expansion over 20-600°C (68-1080 °F) | - - - - - - - | 14 x 10-6 m/m °C |
| Thermal conductivity at 20 °C (68 °F) | - - - - - - - | 13 W/m °C |
| Thermal conductivity at 100 °C (212 °F) | - - - - - - - | 14 W/m °C |
| Thermal conductivity at 200 °C (392 °F) | - - - - - - - | 15 W/m °C |
| Thermal conductivity at 300 °C (572 °F) | - - - - - - - | 16 W/m °C |
| Maximum operating temperature | - - - - - - - | 550 °C (1022 °F) |
| Other | Available Colors | |
|
[1] For larger parts the accuracy can be improved by post-process stress-relieving at 650 oC for 1 hour.
[2] Mechanical stability is dependent on geometry (wall height etc.) and application.
[3] Mechanical testing according to ISO 6892:1998(E) Annex C, proportional test pieces, Diameter of the neck area 5 mm, original gauge length 25 mm.
[4] Vickers hardness measurement (HV) according to DIN EN ISO 6507-1. Note that depending on the measurement method used, the measured hardness value can be dependent on the surface roughness and can be lower than the real hardness. To avoid inaccurate results, hardness should be measured on a polished surface.
[5] Due to work-hardening effect.
The information presented are typical values intended for reference and comparison purposes only. They should not be used for design specifications or quality control purposes.
End-use material performance can be impacted (+/-) by, but not limited to, part design, end-use conditions, etc. Actual values will vary with build conditions.
Product specifications are subject to change without notice.
The performance characteristics of these materials may vary according to application, operating conditions, or end use. Each user is responsible for determining that the material is safe, lawful and technical suitable for the intended laws and regulations. Zare makes no warranties of any kind, express or implied, including, but not limited to, the warranties of merchantability, fitness for a particular use, or warranty against patent infringement.
All information contained in this document were supplied by EOS GmbH-Electro Optical System Copyright© 2013
All Trademarks included in this document are property of the respective owner