High tensile strength stainless fasteners

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Edgar Shawn Taylor
7 years ago
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1 High tensile strength stainless fasteners

2 BUFAB STAINLESS HISTORY 1674 Svartå Bruk was founded 1912 Svartå Bruk was incorporated into the Hasselfors group Production of Stainless Steel Fasteners started The melting house was closed down Change of name to Hasselfors Stainless Åshammar Forging & Nail Factory was founded Åsh Forging & Nail change to Åshammars Bolt Factory and the fastener production started Production of Stainless Steel fasteners started Åsh Bolt Factory was incorporated into the the Bulten group The two companies merged into Bulten Stainless 1992 The cold heading were moved to Åshammar and Svartå concentrated in machining / marketing/ logistics Finnveden invest, the new owner of Bulten Change of name to Bufab Stainless AB 2005 Nordic Capital acquire Finnveden and divide Bufab as own group from Finnveden

1899 Åsh Forging & Nail change to Åshammars Bolt Factory and the fastener production started. 1926 Production of Stainless Steel fasteners started.

3 Fastener production 1904 The Good old days

4 The Bulten head office 1897

7 Volvo Ocean Race (former Whitbread Round the World Race)

8 Whitbread Round the World Race. EF Language. 18 PCs of M39 Bolts = 36 Kg Strength 700 MPa ~101 ksi Volvo Ocean Race. ASSA Abloy. 12 PCs of M30 Bolts = 11 Kg Strength 1550 MPa ~225 ksi

9 Production Technique Cold heading Hot forging Machine finishing Machines Cold headers Thread rollers CNC machines Nut formers Hot forging lines Size range M2 - M42

10 Engineering Design Production Know-how Technical support Quality ISO 9001 ISO QS 9000 PED No 97/23/EC

11 High performance products Unique products BUMAX 88 BUMAX 109 BUMAX 129 BUMAX LDX (Under development) BUMAX (Under development) BUMAX HARD High temperature products For end users with stringent requirements for the best performance

(Under development) BUMAX HARD High temperature products

13 The benefits of BUMAX The strongest stainless steel fasteners in the market Lower weight, higher strength Superior resistance to corrosion High and low temperature Non-magnetic Complete assortment in stock

strength Superior resistance to corrosion High and

14 BUMAX 200 Yield strength 90% of = MPa (160 ksi) Tensile strength MPa (174 ksi) BUMAX BUMAX 129 BUMAX Steel bolt standard A4-80 Stainless steel bolt standard BUMAX 88

BUMAX 149 12.9 10.9 BUMAX 129 BUMAX 109 8.

15 Mechanical properties Strength Range Tensile strength Yield strength Elongation Group/type class Rm Rp 0.2 M Inch N/mm2 PSI N/mm2 PSI A4-80 (316) 80 M5 - M24 3/ , , x d BUMAX M3 - M36 1/8-1 3/ , , x d BUMAX M6 - M12 1/4-1/ , , x d 1 Mpa = 1 N/mm2 = 145 psi BUMAX 88/109 are made in material 316L HiMo PED elongation min 0.4 x D

3 x d BUMAX 88 80 M3 - M36 1/8-1 3/8 800 116,000 640 92,800 0.

16 N/mm Specification Typical test result Tensile (Rm) Tensile (Rm) Yield (Rp) Yield (Rp) BUMAX 88 BUMAX 109 BUMAX 88 BUMAX 109

600 640 400 Tensile (Rm) Tensile (Rm) Yield

17 Lower weight Higher strength Smaller screw joints Replace 8.8 and 10.9 M20 M14 M12 M10 A4-50 A

19 Chemical composition Steelgrade C max Cr Ni Mo A2 (304) A4 (316) BUMAX (316L HiMo)

0 A4 (316) 0.08 16.0-18.0 10.0-14.0 2.0-2.

21 General corrosion Test in Sulphuric acid H 2 SO 4 at 50 C (122 F) % sulphuric acid EN ASTM , ,316L L HiMo (BUMAX) The corrosion rate is expressed as mm/year (Test made by Sandvik, Sweden)

24 Pitting/crevice Corrosion PRE-value (Pitting Resistance Equivalent) PRE = % Cr + 3,3 x % Mo + 16 x % N EN ASTM % Cr % Mo % N PRE , ,316L L HiMo (BUMAX) PRE > 40 is totally resistance against pitting/crevice corrosion in sea-water PRE >40 (254 SMO,SAF 2507) BSI manufactures in these steels

25 CR Corrosion rating after ten years expose to marine atmosphere as a function of alloying element content. (CR up to 3 = no corrosion) AISI 304L AISI 316L Bumax CR PRE Pitting/crevice Corrosion PRE-value (Pitting Resistance Equivalent) PRE = % Cr + 3,3 x % Mo + 16 x % N

28 Permeability Steel grade Yield strength Maximum relative permability and class N/mm2 PSI km A2-70 (304) , A2-80 (304) , A4-80 (316) , BUMAX 88 (316L HiMo) , BUMAX 109 (316L HiMo) , Permeability is a measurement on a materials ability to let a magnetic field go through and it s described as the permeability value km. This is the value for the permeability of a material in relation with to vacuum, where Km 1,000 is totally non-magnetic. BUMAX can be regarded as non magnetic.

31 High temperature applications

32 Mechanical properties at high temperature Remaining Yield strength in % of RT Steel and 100ºC 200ºC 300ºC 400ºC 500ºC 600ºC strength class 218 F 398 F 578 F 758 F 938 F 1118 F A4 80 (316) BUMAX BUMAX Note: creep strength at around 550ºC BUMAX 88 PED can be used from -200 ºC up to 400 ºC

33 The solution (Working temperature ºC) BUMAX 88 M36 studs + nuts Higher temperature resistant Higher strength Higher tightening torque

36 Pressure vessel fasteners approved by TÜV to PED No 97/23/EC ( )

38 Pressure equipment > 0,5 bar above atmospheric Pressure (1013mbar)

39 Before PED ADW MPa (SS) 640 MPA (S) PED 200 MPa (SS) 200 MPa (S) BUMAX MPa (SS) A2/A A2/A BUMAX 88 M8 (SS) M10/12 (SS) M6 M8 (S) M14/16 (S) M8

41 BUMAX 129 (special item) Mechanical properties Tensile strength Rm N/mm2 Yield strength RP 0,2/mm2 Elongation min (174 ksi) (160 ksi) 0,2 x d Material 254 SMO Chemical composition C 0,02 Cr 19,5-20,5 Ni 17,5-18,5 Mo 6,0-7,0 C 0,05 Cr 12,0-14,0 Ni 3,5-4,5 Mo 0,3-0,7 Material under testing. LDX 2101, EN (Outokumpu, former Avesta polarit)

42 Surface treatment Dacromet Copper Silver Zinc

46 Material Outokumpu LDX (Lean Duplex) Standards EN ASTM BUMAX LDX Mechanical properties Tensile strength Rm N/mm Yield strength Rp 0,2/mm Elongation min > 0,85 x d Corrosion resistance In between A2 and A4 closer to A4 Chemical composition C 0,03 N 0.22 Cr 21.5 Ni 1.5 Mo 0.3

48 BUMAX (Under development) Mechanical properties Tensile strength Rm N/mm2 Yield strength RP 0,2/mm2 Elongation min ( ksi) ( ksi) < 0,2 x d Material Sandvik Nanoflex Chemical composition C 0,02 Cr 12,0 Ni 9,0 Mo 4,0 Cu 2,0 Ti 0,9 Al 0,4 We have reached Rm N/mm2 RP N/mm2

BUMAX. REYHER your partner for the BUMAX range

BUMAX. REYHER your partner for the BUMAX range BUMAX high-tensile stainless steel fasteners REYHER your partner for the BUMAX range Strongest stainless steel fasteners in the world BUMAX 88 and BUMAX ready for delivery from stock Wide range of BUMAX