SANDVIK 14AP FREE-CUTTING WIRE WIRE

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Myles Hunter
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1 SANDVIK 14AP FREE-CUTTING WIRE WIRE DATASHEET Sandvik 14AP is a hardenable free-cutting carbon steel characterized by excellent machinability and good wear resistance and hardness after hardening. CHEMICAL COMPOSITION (NOMINAL) % C Si Mn P S Pb FORMS OF SUPPLY Sandvik 14AP is normally supplied in straight lengths with a center less ground surface finish. Grinding provides a completely decarborization-free steel with tight tolerances. Sandvik 14AP can also be supplied as drawn wire in coils, or in straight lengths. Forms of supply/ finishes Wire in coils: Diameter mm Bright drawn D4 Straightened wire: D D D2 Bright drawn D D3 Coated D D2 Ground h8 Other dimensions and tolerances can be supplied on request. Straightened Standard length Length tolerance Dimension m mm / /-20 Other lengths can be supplied on request. Standard tolerance 1 SANDVIK 14AP FREE-CUTTING WIRE

MECHANICAL PROPERTIES At 20 C, nominal values Forms of supply/finishes Diameter Tensile strength Proof strength Elongation Wire in coils mm R m 1 R p0.2 A N/mm2 N/mm 2 % Drawn 0.5-9.

2 MECHANICAL PROPERTIES At 20 C, nominal values Forms of supply/finishes Diameter Tensile strength Proof strength Elongation Wire in coils mm R m 1 R p0.2 A N/mm2 N/mm 2 % Drawn Straightened wire Drawn Ground ) Nominal values. Other properties on request. 2) Corresponds to 0.2% proof strength. 3) R p0.2 and elongation values are given for information only. 1, 2, 3 1, 3 Impact strength Observe that quenching time and temperature is dependent on material size. The specimens for impact strength are larger than standard wire dimensions. Figure 1. Impact strength after recommended hardening procedures, valid for all dimensions. Soaking time 30 minutes. Standard Charpy-V specimens at 20oC. PHYSICAL PROPERTIES Density annealed Resistivity Cold drawn, at 24 C Thermal expansion, per C (x10 o g/cm, 0.28 lb/in 0.17 µωm ), mean values in temperature ranges. Temperature, C Cold drawn Sandvik 14AP is a magnetic material. 3 3 HEAT TREATMENT Wire is normally delivered in a cold drawn condition. If increased hardness is required the following is 2 SANDVIK 14AP FREE-CUTTING WIRE

3 recommended. Hardening Diameter Temperature Soaking time Quenching mm oc approx. min. < in oil at 50oC in water > in water MACHINING The recommended values, based on Sandvik Coromant cemented carbide cutting tools or high speed steel tools from Sandvik, are to be regarded as starting data. To obtain the optimal combination of finishes, tolerances and productivity the values should be adjusted for each individual operation. The data assumes the use of a suitable cutting fluid. In machining without a cutting fluid, the values should be reduced by about 10%. Detailed recommendations can be obtained from your nearest Sandvik Coromant or Sandvik Materials Technology office. In the manufacture of sophisticated precision components, the material's highly uniform and very good machinability offers reliable production with high productivity. This is of major importance since component processing costs can be several hundred times greater than the cost of the raw material. Material in the drawn condition up to Ø 3 mm has a Cu/Sn surface layer. The layer enables components to be machined on lathes equipped with guide bushing. Turning CNC lathes and similar Indexable insert tools. For diameters d < approx. 20 mm lower cutting speeds should be used. Feed mm/rev. m/min. GC 4015 CT525 GC 235 CT 5015 GC 4025 GC Bar automatics Diameter > approx. 2 mm Tool m/min. Single and multiple spindle automatic lathes Diameter > approx. 10 mm 3 SANDVIK 14AP FREE-CUTTING WIRE

4 Operation Feed, mm/rev. Finish turning Rough turning Single point Forming Plunge cutting and parting off Longitudinal turning automatics, plunging automatics and similar machines Diameter < approx. 10 mm Operation Cutting depth mm Feed, mm/rev. Finish turning1) Medium Rough turning 2) Single point turning < Forming Plunge cutting and parting off > ) For parts requiring high precision. 2) For parts with moderate tolerance requirements and parts that subsequently must be finish-machined. Parting off and grooving Parting off in CNC lathes and similar Tool Feed mm/rev. m/min. GC 2135, Threading Tool Grade Threading dies 4-7 Thread taps Self opening die heads Thread chasers Thread rolling Thread turning GC Drilling Drill diameter Feed Speed mm mm/rev. rpm SANDVIK 14AP FREE-CUTTING WIRE

5 Drilling Drill diameter Feed Speed mm mm/rev. rpm 31) ) ) ) ) Cemented carbide drills of Delta-C type, designation R840, with the following data can also be used: Grade GC1220, speed m/min. Milling Operation Grade Feed Finish milling with high cutting speed under favorable working conditions Finish and medium-rough milling under normal to difficult working conditions 530 or or Medium-rough to rough milling under difficult conditions SM30 or mm/tooth End milling Tool type Grade Indexable insert tools Solid carbide end mills Brazed helical fluted end mills GC1620 P Slotting and slitting Tool Hobbing Tool Reaming for diameters > about 2 mm Reamer Grade 5 SANDVIK 14AP FREE-CUTTING WIRE

6 Straight/helical fluted Gun drill geometry 20 m/min Feed in reaming Diameter Feed Allowance mm mm/rev. mm All data is nominal. Values refer to 20 C unless otherwise stated For other requirements and further information please contact your local Sandvik office. Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Sandvik materials. materials.sandvik/contact-us MATERIALS.SANDVIK

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