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NAS 301-K3GHigh Workability Stainless Steel for Springs

Characteristics of NAS 301-K3

‚PD@Specification of springs for Type 301 is satisfied.

‚QD@Following properties are characterized comparing normal grade of springs.
@@@(1) Surface roughness and micro cracks are improved after working compared with conventional materials.
@@@(2) Etched surface becomes sooth.

Chemical Composition

(%)

- C Si Mn P S Ni Cr Remark
NAS 301-K3 …0.15 …1.00 …2.00 …0.030 …0.030 6.00
`8.00
16.00
`18.00
Same as Type 301 in JIS G4305 and G4313
Example 0.09 0.86 0.80 0.030 0.002 6.42 16.55 @@@@@

Smoothness at bended surface

Surface after bending of H finish material with 0.2 mm thick is shown in Table 1. Smoothness at bended surface is improved and micro cracks are less.

NAS 301-K3

 Thickness
(mm)
Tensile strength
iN/mm2j
Hardness
iHVj
0.2 1542 466
NAS301-K3

Surface after bending of standard Type 301 stainless steel

Thickness
(mm)
Tensile strength
iN/mm2j
Hardness
iHVj
0.2 1547 468
NAS301-K3

Application

It is suitable for various application requiring workability and surface smoothness after working.

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