DIN 17742 is a German standard for nickel-based alloys, specifically for wrought nickel and nickel alloys. The standard is published by the German Institute for Standardization (DIN) and provides specifications for the chemical composition, mechanical properties, and testing requirements of nickel-based alloys.
While the standard specifies the chemical rules for these alloys, it does not define their final dimensions. Details on dimensions and tolerances are covered by other complementary standards, such as DIN 17750 for sheets and plates, or DIN 17752 for rods and bars.
Companies such as Auerhammer and Special Metals often provide condensed data sheets in PDF format that summarize the DIN 17742 standard's key requirements. Summary of Relevant Standards DIN 17742: Wrought Nickel-Chromium Alloys. din 17742 pdf
| DIN 17742 Designation | Common Trade Name | Key Characteristic | Typical Application | |----------------------|--------------------|--------------------|----------------------| | 2.4496 | NiFe 48 | High permeability at low induction | Relay cores, transformer laminations | | 2.4499 | NiFe 72 (Mu-metal) | Very high permeability | Magnetic shielding (medical, electronic) | | 2.4541 | NiFe 54 (Radiometal) | High initial permeability | Sensitive magnetic amplifiers | | 2.4473 | NiFe 36 (Invar) | Extremely low thermal expansion | Precision instruments, LNG tank supports | | 2.4475 | NiFe 42 (Kovar-type) | Matches glass/ceramic sealing | Transistor headers, integrated circuit packages |
| Standard | Title / Scope | | :--- | :--- | | | Wrought nickel - Chemical composition | | DIN 17741 | Wrought nickel alloys, low alloyed - Chemical composition | | DIN 17743 | Wrought nickel-copper alloys - Chemical composition | | DIN 17744 | Wrought nickel-chromium-molybdenum alloys - Chemical composition | | DIN 17745 | Wrought alloys of nickel and iron - Chemical composition | | DIN 17750 | Sheets and plates of wrought nickel and nickel alloys - Properties | | DIN 17751 | Tubes of wrought nickel and nickel alloys - Properties | | DIN 17752 | Bars of wrought nickel and nickel alloys - Properties | | DIN 17753 | Wires of wrought nickel and nickel alloys - Properties | DIN 17742 is a German standard for nickel-based
The testing methods specified in DIN 17742 include:
The standard covers several common high-performance alloys. Below are technical references for grades frequently associated with this standard: DIN 17742 - Accuris Standards Store Details on dimensions and tolerances are covered by
The story of these alloys takes place in the harshest "settings" imaginable: DIN 17742 - European Standards
Most of these are either:
For example, the material known as NiCr30Fe (often corresponding to Alloy 800) would have historically been detailed in DIN 17742. Today, a procurement specialist would need to cross-reference this with the equivalent EN standard to ensure they are sourcing material that meets current legal and quality requirements within the EU. However, the chemical composition limits established in the original DIN standard often remain largely consistent with the new EN standards, preserving the validity of the technical data even if the document itself is officially "withdrawn."