METRIC BOLT GRADES AND STRENGTH CALCULATOR. Mechanical properties of grade 4.6, 4.8 , 5.6, 5.8 , 6.8 , 8.8 , 9.8 , 10.9 and 12.9 are covered and this calculator was developed according to ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts , screws and studs and ISO 898-7 – For metric bolts strength is according ISO 898 Mechanical properties of fasteners made of carbon steel and alloy steel described by property classes with designations 4.6, 4.8, 5.8, 8.8, 9.8, 10.9 and 12.9. 1 Pa = 1 N/m2 = 1.4504x10-4 lb/in2 (psi) 19 rows 18- 8 Stainless Steel alloy with 17-19% Chromium and 8 -13% Nickel: All Sizes thru 1 20,000 …

Feb 21, 2004 An 8.8 bolt has an ultimate tensile strength of 80 Kg/mm2 (785N/mm2) and a yield strength of 80% x 80Kg/mm2 = 64 Kg/mm2 (628N/mm2) Surely an allowable shear stress of 70% x ultimate tensile stress is much too high. This 550 N/mm2. Generally, the shear stress is equal to 60% x yield stress. This gives a shear stress of 375 N/mm2. U-Bolt-It supplies high quality metric bolts to all industries, including metric grade 8.8 bolts . We stock a full line of metric 8.8 bolts , and work with the top manufacturers in the industry to provide the highest quality bolts for our clients. M12x35mm Grade 8 . 8 Metric Hex Flange Screws Bolts 10pcs See more like this (20) M6-1.0x20 Grade 8 . 8 Metric Hex Flange Screws Flange Bolts . Brand New. $3.75. Buy It Now . 25 PIECES M10 -1.5 X 35MM LENGTH HEX HEAD BOLTS 8 . 8 STRENGTH METRIC CAP SCREWS. Brand New. $17.99. FAST 'N FREE. Buy It Now. Guaranteed by Sat, Feb. 23.

The highest metric class for strength , it exceeds Grade 8 . Because there are so many different grades and fasteners all look about the same, medium carbon and alloy steel strength grades are marked for identification. Bolts and screws also bear a mark to identify the manufacturer. by John Erwin. The tensile strength of a grade 8 bolt is 150,000 pounds per square inch. Tensile strength is the maximum load in tension (stretching) that a part can carry without breaking. In addition to tensile strength , other mechanical factors in a connection should be considered, including yield strength and proper assembly of the parts. Metric hex bolts, Zinc plated class 8.8 steel. Hex bolt diameter is measured on the outside of the threads. Resources. Metric hex bolt sizes (opens in new window/tab)

For the 10.9 bolt , the 9 tells the user that the yield strength of the bolt is approximately 90% of the first number: 1,000 MPa. Thus, the 10.9 bolt has an approximate yield strength of 900 MPa (940 MPa by specification). heremon symbols that are included on metric …