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 Kogyo 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
  • Standard
  • Chemical Composition
  • Major Applications
  • Mechanical
Nippon Yakin Grade UNS EN / DIN JIS
NAS301 S30100 ー SUS301
NAS304 S30400
S30409		 1.4301 SUS304
NAS305 S30500 ー SUS305
NAS316 S31600
S31609		 ー SUS316
NAS317 S31700 ー SUS317
NAS301L S30103 ー SUS301L
NAS304L S30403 ー SUS304L
NAS347 S34700 ー SUS347
NAS316L S31603 1.4435 SUS316L
NAS317L S31703 ー SUS317L
NAS304MK ー ー SUS304J2
NAS304DJ ー ー SUS304J1
NAS304SS S30400
S30409		 1.4301 SUS304
NAS303AM S30300 ー SUS303
NAS301N ー ー ー
NAS304N2 ー ー SUS304N2
NAS309S S30908 ー SUS309S
NAS310S S31008 ー SUS310S
Nippon Yakin Grade UNS ASME ASTM DIN EN
NAS301 S30100 ー A240 ー ー
NAS304 S30400
S30409		 SA-240 A240 ー EN10028-7
NAS305 S30500 ー A240 ー ー
NAS316 S31600
S31609		 SA-240 A240 ー ー
NAS317 S31700 ー A240 ー ー
NAS301L S30103 ー A240 ー ー
NAS304L S30403 ー A240 ー ー
NAS347 S34700 SA-240 A240 ー ー
NAS316L NAS316L SA-240 A240 DIN17440
DIN17441		 EN10088-2
NAS317L S31703 SA-240 A240 ー ー
NAS304MK ー ー ー ー ー
NAS304DJ ー ー ー ー ー
NAS304SS S30400
S30409		 SA-240 A240 ー EN10028-7
NAS303AM S30300 ー A895 ー ー
NAS301N ー ー ー ー ー
NAS304N2 ー ー ー ー ー
NAS309S S30908 SA-240 A240 ー ー
NAS310S S31008 SA-240 A240 ー ー
Nippon Yakin Grade UNS Chemical Composition
NAS301 S30100 Standard Type 17 Cr-7 Ni
NAS304 S30400
S30409		 18 Cr-8 Ni
NAS305 S30500 18 Cr-12 Ni
NAS316 S31600
S31609		 17 Cr-12 Ni-2.5 Mo
NAS317 S31700 18 Cr-12 Ni-3.5 Mo
NAS301L S30103 Intergranular Corrosion Resistance 17 Cr-7 Ni-low C-N
NAS304L S30403 18 Cr-10 Ni-low C
NAS347 S34700 18 Cr-9 Ni-Nb
NAS316L S31603 18 Cr-12 Ni-2.5 Mo-low C
NAS317L S31703 18 Cr-12 Ni-3.5 Mo-low C
NAS304MK ー For Forming 16 Cr-7 Ni-4 Mn-2 Cu
NAS304DJ ー 17 Cr-7 Ni-2 Cu
NAS304SS S30400
S30409		 18 Cr-8 Ni
NAS303AM S30300 Free-Machning 18 Cr-8 Ni-high S
NAS301N ー High Strength 17 Cr-7 Ni-N
NAS304N2 ー 18 Cr-8 Ni-N-Nb
NAS309S S30908 Heat Resistance 22 Cr-12 Ni
NAS310S S31008 25 Cr-20 Ni
Nippon Yakin Grade UNS Major Applications
NAS301 S30100 A material with lower chromium and nickel than SUS304 for superior work hardening. Coil springs, bolts, nuts
NAS304 S30400
S30409		 A general-use stainless steel. Provides an excellent balance of properties while being easy to use. Food equipment, general chemicals, daily goods
NAS305 S30500 Provides lower work hardening than SUS304. Spinning, cold forging
NAS316 S31600
S31609		 A form of SUS304 with molybdenum added for superior pitting corrosion resistance and little magnetism after working.
NAS317 S31700 A material with pitting corrosion resistance enhanced over SUS316. Outer plates for equipment
NAS301L S30103 A low-carbon form of SUS301 with grain boundary corrosion resistance and superior weldability. Railroad cars
NAS304L S30403 A material with less carbon and more nickel than SUS304. Resistant to rust and providing excellent grain boundary corrosion resistance. Parts that cannot be heat treated after welding
NAS347 S34700 Containing neodymium, this provides a high level of resistance to grain boundary corrosion.
NAS316L S31603 A form of SUS316 steel with an extremely low level of carbon to provide a high level of grain boundary resistance.
NAS317L S31703 A form of SUS317 with a low level of carbon to provide a high level of grain boundary resistance.
NAS304MK ー A form of SUS304 with added copper for excellent cold workability and non-magnetism. Bolts, nuts
NAS304DJ ー An SUS304 base with lower nickel and higher copper for cold formability and particularly favorable deep drawing. Sinks, warm water tanks
NAS304SS S30400
S30409		 For deep drawing and stretch forming
NAS303AM S30300 A highly machinable stainless steel with improved cuttability and burning resistance, though less resistant to corrosion. Bolts, nuts
NAS301N ー Stainless steel made from SUS301 with nitrogen added for strength. Coil springs, bolts, nuts
NAS304N2 ー A metal made from SUS304 with nitrogen and neodymium added for strength while maintaining a high level of extendibility. Applications similar to 304N1
NAS309S S30908 A stainless steel providing superior resistance to heat and corrosion over SUS304. For applications requiring resistance to heat.
NAS310S S31008 Providing superior corrosion and heat resistance to SUS309S. For uses requiring resistance to heat.
Nippon Yakin Grade UNS Yield Strength
(N/mm²)		 Tensile Strength
(N/mm²)		 Elongation
(％)		 Hardness
HRB HV HB
NAS301 S30100 ≧ 205 ≧ 520 ≧ 40 ≦ 95 ≦ 218 ≦ 207
NAS304 S30400
S30409		 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS305 S30500 ≧ 175 ≧ 480 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS316 S31600
S31609		 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS317 S31700 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS301L S30103 ≧ 215 ≧ 550 ≧ 45 ≦ 95 ≦ 218 ≦ 207
NAS304L S30403 ≧ 175 ≧ 480 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS347 S34700 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS316L S31603 ≧ 175 ≧ 480 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS317L S31703 ≧ 175 ≧ 480 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS304MK ー ≧ 155
≦ 255		 ≧ 450
≦ 600		 ≧ 55 ≦ 80 ≦ 155 ≦ 187
NAS304DJ ー ≧ 155 ≧ 450 ≧ 55 ≦ 90 ≦ 200 ≦ 187
NAS304SS S30400
S30409		 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS303AM S30300 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS301N ー ≧ 245 ≧ 690 ≧ 30 ≦ 95 ≦ 220 ー
NAS304N2 ー ≧ 345 ≧ 690 ≧ 35 ≦ 100 ≦ 260 ≦ 248
NAS309S S30908 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
NAS310S S31008 ≧ 205 ≧ 520 ≧ 40 ≦ 90 ≦ 200 ≦ 187
Inquiries about painted stainless steel sheets
To Tokyo branch TEL.+81-3-3273-4621