Transcription of Stainless Steel
1 Stainless Steel .. 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.
2 Manufacturing Processes . Melting / Refining / Casting Hot working 150t . RH Bloom 150t electric arc Ladle furnace RH vacuum Continuous casting furnace melting refining degassing . Cogging Large-diameter bar rolling . Continuous casting . Billet Billet rolling . Billet inspection 60t RH . 60t electric arc Ladle furnace RH vacuum Ingot casting Ingot furnace melting refining degassing . Remelting . Forging VAR ESR.. Vacuum melting VIM. 3. 2 . Secondary working Inspection Product . Rolled bars . Heat treatment Inspection . Peeling Rolled bars.
3 Inspection . Bar and wire rod rolling Pouring Wire rods . Heat treatment Inspection . Wire drawing Wires . Inspection . Hot extrusion Tubes . Heat treatment Inspection . Cold pilgering Tubes . Heat treatment Inspection . Forged bars . Heat treatment Inspection . Turning 4.. Classification of Stainless Steel . 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).
4 Ferritic group Annealing Good Yes Small . Duplex group Solution treatment Excellent Yes Medium ( ) ( 2 ) . Precipitation hardening group Solution treatment, precipitation hardening Good Yes( 2) Small . Corrosion resistant / heat resistant alloy Annealing, Solution treatment Excellent No Medium 1 1: Austenitic Stainless steels may be magnetized by cold working. 2 2: Depending on what materials they are made of, some precipitation hardening Stainless steels are not magnetized by solution heat treatment. Austenitic group Martensitic group.
5 Ni .. Features Features High corrosion resistance and good cold workability due to high Various mechanical properties due to quench hardening ductility and toughness Relatively inexpensive due to lower Ni content Superior weldability and excellent properties at both low and high Application temperatures Shafts, bolts, valves, nozzles, and turbine blades Application Household products, building materials, automobile parts, and various industrial plants 5. Ferritic group Duplex group .. Ni .. Features Features Better formability and corrosion resistance compared with martensitic High resistance to pitting corrosion, intergranular corrosion, and Stainless Steel stress corrosion cracking Good weldability Higher strength compared with austenitic Stainless Steel Relatively inexpensive due to lower Ni content Application Application Plant equipment parts for the chemical, petrochemical, and pulp Culinary, automobile, calori er, electric appliance.
6 And plant equipment industries parts Precipitation hardening group Corrosion resistant / heat resistant alloy .. Features Features Better cold workability in the solid solution state Exceptional high temperature strength and resistance to many types Higher toughness, corrosion resistance, weldability compared with of corrosion including acid corrosion, stress corrosion cracking, martensitic Stainless Steel pitting corrosion, and intergranular corrosion Application Application Springs, hydraulic machinery parts, pumps, shafts, jet engine parts, Aircraft parts and plant equipment parts for the chemical, propeller shafts for out board motors.
7 And structural materials for petrochemical, and nuclear power generation industries aircrafts and rockets 6.. Classification Diagram Austenitic Duplex and Precipitation hardening groups . -C . 19-10. Intergranular C corrosion resistance SUS304L.. +Ni -C,+Ni 18-12. Cold headability 18-11 Cold headability C SUS305 SUS305JI . Corrosion resistant / heat resistant alloy . (+Cu) +Cu . Low work hardening 18-8-Cu Cold headability 18-9-Cu Ni-15Cr-9Fe property SUS304J3 SUSXM7 NCF600. 18-8-Ti Ni-23Cr-A . SUS321 NCF601. (+Ti Nb) (-C). 17-12-Mo Intergranular Intergranular C corrosion 18-8-Nb corrosion resistance SUS316L 20-32-A Ti resistance SUS347 NCF800.
8 SUS317L. NCF800H.. (+Mo) (+Nb) . 17-12-Mo 17-12-MoNb 20-40-MoCu Acid and corrosion SUS316 Intergranular resisitance corrosion resistance 316Nb (+Cr Ni . etc.) NCF825. SUS317 Acid corrosion . (+Ti) and heat . Intergranular resistance (+Cu) 17-12-MoTi 20-34-MoCu Acid and corrosion corrosion resistance SUS316Ti QS20Cb3. resisitance . 18-12-MoCu (-C) 18-12-MoCu C Ni-Cu . SUS316J1 Intergranular QA400. corrosion resistance SUS316J1L. Austenitic group . (+Cr, Ni) . 18-8 23-13 (+Cr, Ni). C Heat and oxidation 25-20. resistance SUS309S Oxidation resistance SUS310S.
9 SUS304. (+Si, Mo, Nb) 25-24-MoSi (+Si) 18-8-Si QSX5. Heat and oxidation SUS302B. resistance 18-12-Si SUSXM15JI. 20-25-Mo (+S) 18-8-S (+Cu) (+Mo, Nb, Ti, Cu). SUS303 18-8-Cu QS2025M. Machinability 303HS2 Non-magnetism SUS303Cu Corrosion QS2025MC. 303HS3 resistance QS2025MT.. (+Se). 18-8-Se Machinability SUS303Se . Precipitation hardening group (+N) SUS304N1 . Strength SUS304N2 (+A ) 17-7-A . SUS316N Precipitation SUS631. hardening (+C) SUS304H . High temperature SUS316H (-Ni, +Mo, Cu). Precipitation 17-4-MoCu strength SUS321H QSH6. SUS347H hardening.
10 (-Ni, Cr) (-Ni, +Cu) 17-4-Cu Work hardening 17-7. SUS301. Precipitation SUS630. property added hardening Ni . (-Ni, +Mn, N) (+Cu) (+Mo, N). SUS201 Non-magnetism 17-7-MnNCu Corrosion resistance Saving of nickel SUS202 QSM5 22-5-Mo SUS329J3L.. (+Cr, Mo). (-Ni, +Cr, Mo) 25-5-Mo Corrosion resistance 25-5-Mo Duplex group Stress corrosion SUS329JI. resistance SUS329J4L. 7. Martensitic and Ferritic groups : . Developed Steel . Martensitic group . (+Si) 13Cr Heat resistance SUS410.. (+Mo) 13Cr-Mo Heat resistance SUS410J1.. (+S) 13Cr-S (+Se).
