NAS 304-K3 Cold Working Stainless Steel for Springs
Characteristics
Following properties are characterized comparing with conventional SUS304 for springs.
(1) Possible to apply large working with little surface roughness owing to large elongation.
(2) Easy to get smooth surface after etching caused by fine grain size
Chemical Composition
(％)
| - | C | Si | Mn | P | S | Ni | Cr | Remark |
| NAS 304-K3 | ≦0.08 | ≦1.00 | ≦2.00 | ≦0.045 | ≦0.030 | 8.00 ～10.50 |
18.00 ～20.00 |
Equivalent of JIS G4305 SUS304 |
| Example | 0.04 | 0.54 | 0.91 | 0.031 | 0.002 | 8.06 | 18.15 |
Product Range
Size ： Thickness 0.08-0.50mm, Width 5-500mm
Finish ： 1/2Ｈ、3/4H（Consultation necessary)
Mechanical Property and Workability
Mechanical properties and workability of 0.2mm thick and 1/2H finish NAS304-K3 is shown in Table1.
NAS304-K3 shows large elongation and high Erichsen value.
Table 1 Mechanical Property and Workability
| Grade | Thickness (mm) |
Finish | Tensile Strength （MPa） |
Elongation （％） |
Hardness （HV） |
Erichsen Value |
| NAS304-K3 | 0.2 | 1/2H | 807 | 51 | 236 | 10.5 |
Surface Smoothness after Working Test
Surface smoothness of 0.2mm thick and 1/2H finish materials after Erichsen test is shown below.
Improved surface smoothness is observed in NAS304-K3 comparing with conventional SUS304.
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Application
Various application requiring workability and surface smoothness after working.
Manufacture of the product range
