Stainless martensitic steels for high quality cutlery and surgical instruments and A longtime partnership in special steels

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2 Stainless martensitic steels for high quality cutlery and surgical instruments and A longtime partnership in special steels Daniel Krebs, Ernst Krebs KG May 27, 2015

3 Agenda 1. Introducing STAHL KREBS 2. Martensitic Steel 3. Successful Partnership 3

4 Agenda 1. Introducing STAHL KREBS 2. Martensitic Steel 3. Successful Partnership 4

5 STAHL KREBS - History founded in 1882 in Solingen founder Ernst Krebs still the name of the company Ernst Krebs KG in the beginning supply of cutlery manufacturers in Solingen Family-owned company until today 5th generation 5

6 STAHL KREBS - Figures 42 employees warehouse area m² Normal stock level app mto mto from that are stainless steel (sheets, coils and bars) own truck fleet 6

7 STAHL KREBS

8 Customer range Cutlery Surgical instruments Hand tools Automotive supplying industry 8

9 Product range 9

10 STAHL KREBS - Service storage and logistics prefabrication (inhouse and extern) very flexible and short lead times just-in-time delivery international business and market know-how intensive technical customer support product development 10

11 STAHL KREBS - Philosophy longtime relationships to customers and suppliers direct contact to end user (usually no distributor or service center) 11

12 Agenda 1. Introducing STAHL KREBS 2. Martensitic Steel 3. Successful Partnership 12

13 Martensitic steel grades Type X 12 Cr 13 X 15 Cr 13 X 20 Cr 13 X 30 Cr 13 X 39 Cr 13 X 46 Cr 13 X 65 Cr 13 X 70 CrMo 15 X 55 CrMo 14 X 90 CrMoV 18 X 50 CrMoV 15 X 20 CrMo 13 X 105 CrMo 17 X 38 CrMo 14 X 39 CrMo 17-1 C (%) Cr (%) Mo (%) Ni (%) Others (%) 0.15 V V V 13

14 Martensitic steel grades Type X 12 Cr 13 X 15 Cr 13 X 20 Cr 13 X 30 Cr 13 X 39 Cr 13 X 46 Cr 13 X 65 Cr 13 X 70 CrMo 15 X 55 CrMo 14 X 90 CrMoV 18 X 50 CrMoV 15 X 20 CrMo 13 X 105 CrMo 17 X 38 CrMo 14 X 39 CrMo 17-1 C (%) Cr (%) Mo (%) Ni (%) Others (%) 0.15 V V V 14

15 Martensitic steel grades Martensitic Grades Austenitic Grades Ni Cr Body-centered tetragonal Face-centered cubic (supersaturated solid solution) Cr Cr V Mo

16 Corrosion Resistance Ranking of important martensitic steels for cutlery X55CrMo14 X50CrMoV15 +V Chrome Molybdenum +Cr +Mo C X20Cr X30Cr13 +C X46Cr13 Carbon Hardness 16

17 Martensitic steels - very efficient steel grades stainless hygienic hardenable wear resistant corrosion resistant food-safe suitable for dishwashers As long as they are used in proper condition based on an accurate hardening and annealing process 17

18 Proper conditions The industrial production of martensitic stainless steels is a big challenge and requires a lot of know-how concerning the material itself and the processing technology used in all necessary production steps. Even the processing of martensitic stainless steels at the end users requires a lot of knowhow especially in forming, hardening and machining. 18

19 Typical applications for martensitic steel grades Grade Applications /410 valves, shafts, screws, bolts, pump parts turbine blades, shafts, piston rods, valves, forsipes /(420L) knives, surgical instruments, brake disks, forsets (similar as 4024 but higher tensile and hardness) /420(M) mainly cutlery /420(H) wear- resistant parts for pumps, blades, /420(H) shears, pen knive blades use of grades depends from required hardness addition of Vanadium improves wear resistance shafts, blades for water turbines Blades, shafts, valves, high wear resist razor blades professional knives 19

20 Reference B Braun / Aesculap Worldwide leading manufacturer of surgical instruments Aesculap AG 20

21 Reference Zwilling Worldwide leading manufacturer of kitchen knives Zwilling J.A. Henckels AG 21

22 Solingen-Law Made in Solingen is a registered trademark in many countries worldwide. The Solingen-Law stipulates: which production steps have to be done in Solingen which properties the product must have which steel grade has to be used Made in Solingen is a declaration of origin and quality. 22

23 Corrosion Resistance Steel grades for Made in Solingen X55CrMo14 X50CrMoV15 +V Chrome Molybdenum +Cr +Mo C X20Cr X30Cr13 +C X46Cr13 Carbon Hardness 23

24 Agenda 1. Introducing STAHL KREBS 2. Martensitic Steel 3. Successful Partnership 24

25 History of cooperation with Outokumpu NIROSTA Beginning in 1911: Exclusive distributor for cutlery steels from Gewerkschaft Deutscher Kaiser (Hamborn) later called August Thyssen-Hütte In the following: different sources within the Thyssen enterprise since 1995 KruppThyssen NIROSTA From the very beginnig: mutual development of stainless steel grades for cutlery and surgical instruments 25

26 History of cooperation with Outokumpu NIROSTA 26

27 Today Successful cooperation between a powerful, high quality stainless steel producer and an extensive warehousing company STAHL KREBS is the strategic distribution partner for martensitic steels for surgical and household applications world wide 27

28 Advantage for producer efficient production lots because of demand bundeling producer can even cover the demand of small customers competent distribution partner with good know how of o technical specifications and requirements o national and international markets 28

29 Advantage for distributor continuity in personal contacts and cooperation continious high quality level of steel products reliability in performance short-term reaction times competent technical customer support 29

30 Advantage for end users / customers Customers benefit from performance of mill and distributor high quality level of martensitic steels extensive stock programm even for small quantities short-term reaction time competent technical customer support 30

31 Summary technical competence at producers, distributors and end users are the basic requirements for production, sale and processing of special steels martensitic steels are special and demanding products, which can show high performance but only under proper manufacturing conditions martensitic steels can be found every day in sensitive sectors like medical engineering, food, automotive etc 31

32 Thank you for your attention. 32