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Stainless Steels

Chemical Composition

Stainless Steels Surface treatment and maintenance are required to protect iron from its tendency to rust. From the need to prevent this loss to rust came the developments of rust-free steel and stainless steel. To prevent rust, at least 10.5 percent chromium is used to form a fine oxidation (passive) film on the surface of the steel. Nippon Yakin produces a variety of stainless steel products superior to conventional stainless steel. Features of these products include resistance to heat, grain boundary corrosion, stress corrosion cracking and weather as well as being highly formable, machinable, and strong with or without being magnetizable.

Designation

Chemical Composition

Standard

Major Applications

Mechanical

Nippon Yakin Grade

UNS

Chemical Composition

NAS 301

S30100

17 Cr-7 Ni

NAS 304

S30400 S30409

18 Cr-8 Ni

NAS 305

S30500

NAS 316

S31600 S31609

17 Cr-12 Ni-2.5 Mo

NAS 317

S31700

18 Cr-12 Ni-3.5 Mo

NAS 304AW



NAS 301L

S30103

NAS 304L

S30403

Standard Type

Weather Proofing

18 Cr-12 Ni

18 Cr-9 Ni-low S-N 17 Cr-7 Ni-low C-N 18 Cr-10 Ni-low C

Intergranular Corrosion Resistance

NAS 347

S34700

NAS 316L

S31603

18 Cr-12 Ni-2.5 Mo-low C

NAS 317L

S31703

18 Cr-12 Ni-3.5 Mo-low C

NAS 86L



NAS 125



NAS 144MLK



NAS 304MK



NAS 304DJ



NAS 304SS

S30400

Stress Corrosion cracking Resistanse High Ni and High Corrosion Resistance



NAS 303AM

S30300

NAS 301N



NAS 304N2



NAS NM15



NAS 302B

S30215

NAS 309S

S30908

18Cr-9Ni-3Cu-low C 19Cr-12Ni-3Si-2Cu-0.8Mo 18 Cr-16 Ni-5 Mo 18 Cr-8 Ni-2 Cu 17 Cr-7 Ni-2 Cu

For Forming 18 Cr-8 Ni

S30409

NAS XM-7

18 Cr-9 Ni-Nb

18 Cr-10 Ni-3 Cu Free-Machning

18 Cr-8 Ni-high S 17 Cr-7 Ni-N

High Strength 18 Cr-8 Ni-N-Nb Non-Magnetic and High Strength

17Cr-15Mn-2Ni-0.35N

Heat Resistance 22 Cr-12 Ni

http://www.nyk.co.jp/en/products/ste... Chemical Composition | Nippon Yak...

11/11/2010

Chemical Composition | Nippon Yakin

NAS 310S

Page 2 of 2

S31008

25 Cr-20 Ni

http://www.nyk.co.jp/en/products/ste... Chemical Composition | Nippon Yak...

11/11/2010

Stainless Steels -

Stainless Steels. Designation. Standard. Major. Applications. Mechanical. Nippon Yakin Grade. UNS. Chemical Composition. NAS 301. S30100. Standard Type.

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