A pocket folding knife made of D2 blade steel. D2 Steel — Tool, Die and Blade Steel D2 steel is a kind of ledeburite tool steel, which is the most available and popular among D-series tool steels. D2 Tool Steel Properties The following tables show D2 tool steel properties including chemical composition, physical and hardness, etc. Chemical Composition D2 tool steel chemical composition is listed in the following table.
Applications D2 metal can be used to manufacture cold work die steels with large cross-sections, complex shapes, high impact resistance, and high wear resistance. Typical applications including: Blanking dies Burnishing tools Space needles, Coining dies Deep-drawing dies Wire-drawing dies Forming dies Gages Thread-rolling dies Lathe centers Punches Threaded rollers Forming and bending rolls Thread rolling jaws and rolls Sendzimir rolls Trimming dies Spinning tools Slitting cutters Shaping and pressing rollers Knurls Broaches Pressing dies and matrices Cold-extrusion dies Wear plates Mandrels Countersink and pressure piles Crimping dies Hot-swaging dies Lamination dies Milling cutters Cutlery Shear blades and knives, etc.
Alloy Steel Tool Steel. Prev Post DIN 1. You might also like More from author. T is the UNS number. It can have the highest ductility among the tool steels in the database. This page shows summary ranges across both of them.
For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare SAE-AISI D2 steel to: tool steels top , all iron alloys middle , and the entire database bottom. A full bar means this is the highest value in the relevant set. Ranges represent what is permitted under applicable standards. Shackelford et al. Below is a simple format for citing this page as a source. If you belong to an institution that sets its own citation guidelines, use those instead.
Elastic Young's, Tensile Modulus. Elongation at Break. Fatigue Strength. S7 is comparatively less resistant to wear but is very tough. It resists distortion during heat treatment well. It is the softest of the steel formulations compared in this article, achieving a typical working hardness range between 48 — 58 HRC. At those levels it achieves a good balance of strength and ductility.
S7 tool steel properties make it a preferred type for riveting, notching, blanking cold forming and bending dies; bull riveters, concrete breakers, dowels, drill plates and hubs. This air-hardening, cold work formulation features very high concentrations of carbon and chromium 1.
D2 is less tough than S7 and A2 tool steels but features decent stability during heat treatment. It is hard to machine and grind and offers medium to high resistance to softening when used at high temperatures.
D2 can reach an approximate tempered hardness range between 54 — 61 HRC and features an approximate compressive yield strength of around ksi to around ksi as hardness increases.
D2 tool steel is often used to make blanking dies, cold forming dies, stamping dies, slitters, punches, trim dies and thread rolling dies for applications when exceptional toughness is not necessary. A2 is also an air-hardening tool steel but includes less than half the chromium 4. Like D2, it is incredibly resistant to distortion during heat treating and is moderately machinable and grindable.
Popular hardness ranges for A2 run between 57 — 62 HRC with a yield strength range between ksi — ksi. This formulation is commonly found in coining, extrusion, trimming, thread roller and large blanking dies; long punches, rolls, master hubs, mandrels, shear blades, slitters and precision tools.
S7, D2 and A2 tool steels are usually always through hardened in vacuum furnaces to preserve clean, smooth surface profiles.
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