SK 550-080 - E-shop - product range | KVT-Fastening Austria

Base Material / Conditions

Unbenanntes DokumentThe working pressure specifications on the preceding page are obtainable under the following conditions:

Base Material of the Installation	Tensile Strength (avg.) [N/mm²]	Elongation (min.) [%]	Ultimate Strength (avg.) Rp 0.2 [N/mm²]	Hardness (min.) HB
High Strength St. ETG-100 AISI 1144	1000	6	865	280
Free Machining Case Hard. Stl. C15Pb Din 1.0403	560	6	300	180
Cast Iron GG-25 DIN 1691	250	-	-	160
Ductile Cast Iron GGG-50 DIN 1693	500	7	320	170
Aluminium-Alloy Al CU Mg 2 DIN 3.1354 / AA2024	480	8	380	120
Aluminium-Alloy Al Mg Si Pb DIN 3.0615 / ~AA6262	340	8	300	90
Cast Al Alloy G-Al Si 7 Mg DIN 3.2371 / AA356-T6	300	4	250	80

Equivalent working pressure capability can be obtained when using base materials with similar mechanical characteristics. However, the appropriate installation instructions must be followed.
Applications for cast aluminium, magnesium alloy, other non-ferrous metals and non-metallic materials upon request
Factors which may lower the working pressure capability are:
- anchorage principle
- bore roughness requirements
- design guidlines
Anchorage between sleeve and base material is achieved when the sleeve is a minimum of HB = 30 greater than the base material. If the hardness difference is less, hole roughness of 10 - 30 µm is needed to achieve indicated working pressures

Security Range

The security range (the difference between working pressure and Test (B) pressure) allows for uncontrollable variations. For instance, dynamic loading at 1 million cycles and a frequency of 3 - 4 Hz has shown that burst pressure Test (A) and Test (B) pressure are reduced about 20% after this point.