8.8 Grade Fastener? - CR4 Discussion Thread

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Anonymous Poster	8.8 Grade Fastener? 06/14/2007 3:27 AM
	what is meaning of 8.8 grade fastner ?
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The Hammer Associate Join Date: May 2007 Location: South Africa Posts: 44	#1 Re: grade 06/14/2007 4:24 AM
	Bolt grades that I know of are: 4.6, 5.6, 6.8, 8.8, 10.9, 12.9 The first number multiplied by 100 is the minimum tensile strength of the bolt material in MPa The second number multiplied by 10 is the ratio of the yield stress to the minimum tensile strength Thus a grade 8.8 bolt has a minimum tensile strength of 800 MPa and a minimum yield stress of 0.8* 800 = 640MPa __________________ Can you imitate yourself?
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You might be interested in: Hook and Loop Fasteners, Captive Fasteners

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