ステンレス鋼 - sanyo-steel.co.jp

1 Unsurpassed manufacturing technology and development of advanced steel grades Aiming to further enhance the quality and functions of stainless steels .. Sanyo Special steel has developed its advanced clean steel technology over many years. Making full use of this unsurpassed manufacturing technology . Sanyo Special steel provides high quality stainless steel and develops innovative steel grades with more advanced functions to meet the increasingly diverse and sophisticated applications of stainless steel . 1 2.. Manufacturing Processes 2.

2 Melting / Re ning / Casting Hot working Secondary working Inspection Product 150t . RH Bloom 150t electric arc Ladle furnace RH vacuum Continuous casting furnace melting re ning degassing . Cogging Large-diameter Rolled bars bar rolling . Heat treatment Inspection . Peeling Rolled bars . Inspection . Continuous casting . Billet . Billet rolling Pouring Bar and wire rod rolling wire rods . Billet inspection Heat treatment Inspection . wire drawing Wires . 60t RH Inspection 60t electric arc Ladle furnace RH vacuum Ingot casting Ingot furnace melting re ning degassing.

3 Hot extrusion Tubes . Heat treatment Inspection . Cold pilgering Tubes . Heat treatment Inspection . Remelting .. Forging Forged bars . Heat treatment Inspection . VAR ESR Turning . Vacuum melting VIM. 3 4.. Classi cation of Stainless steel Ferritic group Duplex group . Properties . Heat treatment . Corrosion resistance Magnetism Thermal expansion (18Cr-Ni) ( 1 ) . Austenitic group Solution treatment Excellent No( 1) Large 13Cr . Martensitic group Annealing, quenching, and tempering Good Yes Small ( 18Cr) . Ferritic group Annealing Good Yes Small.

4 Duplex group Solution treatment Excellent Yes Medium .. ( ) ( 2 ) . Ni . Precipitation hardening group Solution treatment, precipitation hardening Good Yes( 2) Small .. Corrosion resistant / heat resistant alloy Annealing, Solution treatment Excellent No Medium Features Features Better formability and corrosion resistance compared with martensitic High resistance to pitting corrosion, intergranular corrosion, and stress corrosion stainless steel cracking 1: Austenitic stainless steels may be magnetized by cold working. Good weldability Higher strength compared with austenitic stainless steel 1 2: Depending on what materials they are made of, some precipitation Relatively inexpensive due to lower Ni content 2 hardening stainless steels are not magnetized by solution heat Application treatment.

5 Application Plant equipment parts for the chemical, petrochemical, and pulp industries Culinary, automobile, calori er, electric appliance, and plant equipment parts Austenitic group Martensitic group Precipitation hardening group Corrosion resistant / heat resistant alloy .. Ni .. Features Features Features Features High corrosion resistance and good cold workability due to high ductility and Various mechanical properties due to quench hardening Better cold workability in the solid solution state Exceptional high temperature strength and resistance to many types of corrosion toughness Relatively inexpensive due to lower Ni content Higher toughness, corrosion resistance, weldability compared with martensitic including acid corrosion, stress corrosion cracking, pitting corrosion.

6 And Superior weldability and excellent properties at both low and high temperatures stainless steel intergranular corrosion Application Application Shafts, bolts, valves, nozzles, and turbine blades Application Application Household products, building materials, automobile parts, and various industrial Springs, hydraulic machinery parts, pumps, shafts, jet engine parts, propeller Aircraft parts and plant equipment parts for the chemical, petrochemical, and plants shafts for out board motors, and structural materials for aircrafts and rockets nuclear power generation industries 5 6.

7 Classi cation Diagram Austenitic Duplex and Precipitation hardening groups Martensitic and Ferritic groups : . Developed steel . -C . 19-10 . Intergranular corrosion resistance C Martensitic group SUS304L . (+Si) 13Cr +Ni -C,+Ni 18-12 Heat resistance SUS410. 18-11. Cold headability Cold headability C SUS305 . SUS305JI. Corrosion resistant / heat resistant alloy .. (+Mo) 13Cr-Mo (+Cu) +Cu . 18-8-Cu 18-9-Cu Ni-15Cr-9Fe Heat resistance SUS410J1. Low work hardening Cold headability property SUS304J3 SUSXM7 NCF600.. (+S) 13Cr-S (+Se). 18-8-Ti Ni-23Cr-A 13Cr-S Se SUS321 Machinability SUS416 Machinability 416Se NCF601.

8 (+Ti Nb) (-C). 17-12-Mo Intergranular Intergranular . corrosion corrosion resistance C 18-8-Nb SUS316L 20-32-A Ti (+Ni) 12Cr-Ni (+Cr) 17Cr-Ni resistance SUS347 SUS317L NCF800 Strength and corrosion 414 Corrosion resistance SUS431. NCF800H resistance . (+Mo) (+Nb) . 17-12-Mo 17-12-MoNb 20-40-MoCu Acid and corrosion Intergranular resisitance SUS316 corrosion resistance 316Nb (+Cr Ni etc.) NCF825. SUS317. Acid corrosion 17Cr (+Ti) and heat 13Cr resistance (+C) (+C,Cr) SUS440A. Intergranular (+Cu) 17-12-MoTi 20-34-MoCu Wear resistance SUS440B.

9 Acid and corrosion corrosion resistance Strength and wear SUS420J2. SUS316Ti QS20Cb3 resistance SUS440C. resisitance . (-C) 18-12-MoCu . 18-12-MoCu C Ni-Cu (+C) 13Cr (+Mo) 10Cr-Mo SUS316J1 Intergranular corrosion resistance SUS316J1L QA400 Hardness QD51 Toughness and QPD5. Austenitic group corrosion resistance . (+Cr, Ni) . 18-8 (+Cr, Ni).. Heat and oxidation 23-13 25-20. C Ferritic group resistance SUS309S Oxidation resistance SUS310S. SUS304.. 13Cr (-C) 13Cr (+Ti) 13Cr-Ti (+Si, Mo, Nb) 25-24-MoSi C C 18-8-Si Corrosion resistance Corrosion resistance 410Ti (+Si) QSX5 SUS403 SUS410L.

10 SUS302B. Heat and oxidation resistance 18-12-Si . SUSXM15JI (+Cr) 15Cr Corrosion resistance SUS429. 20-25-Mo (+S) 18-8-S (+Cu) (+Mo, Nb, Ti, Cu). SUS303 18-8-Cu QS2025M. Machinability Non-magnetism SUS303Cu Corrosion QS2025MC 7 25Cr-SiA . 303HS2 resistance QS2025MT (+Al) 13Cr-A (+Si, Al, Cr) SIC8. 303HS3. Weldability SUS405 Corrosion resistance SIC9. (+Se) SIC10. 18-8-Se SIC12. Machinability SUS303Se 20Cr-Cu Precipitation hardening group (-C, +Cr) 17Cr (+Cr) AISI443. (+N) SUS304N1 C 25Cr Corrosion resistance Acid and heat Strength SUS304N2 SUS430 resistance SUH446.