Grades of Bolts - Bolt Grade Marking Chart | AFT Fasteners
A chart to identify bolt grades using bolt grade markings; also provides a strength chart for common grade bolts.
Bolt Grade Markings and Strength Chart
Tensile Strength: The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing. Yield Strength: The maximum load at which a material exhibits a specific permanent deformation. Proof Load: An axial tensile load which the product must withstand without evidence of any permanent set.
Grade 8 Bolts: Strength & Applications - Wilson-Garner
2023年8月2日 · Grade 8 bolts are made of medium-strength carbon or alloy steel and can be finished in a variety of coatings and platings for added corrosion resistance and lubricity. You can identify a Grade 8 bolt by looking at its head markings. An SAE J429 Grade 8 bolt’s head marking will show six radial lines like this:
US Bolts - Tensile Strength and Proof Loads
2010年11月25日 · SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength. Endurance limits and fatigue stress for steels. Threaded bolts tensile stress area. Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt. Recommended bolt torques. ANSI/ASME B18.2.3M Dimensions of Hex Bolts - Metric units.
A) Proof loads and tensile strengths are computed by multiplying the proof load stresses and tensile strength stresses given in Table 1 by the stress area of the thread. The stress area of sizes and thread series not included in this table may be computed from the formula: As = 0.7854 [D- ]
Grade 2 requirements for sizes 1/4 through 3/4 in apply only to bolts and screws 6 in. and shorter in lengths. For bolts and screws longer than 6 in. Grade 1 requirements shall apply.
Proof Load Tensile Strength for Grade 2, 5 & 8 Coarse Thread Series – UNRC Nominal Diameter of Products & Threads per inch Stress Area (sq. in.) Grade 2 Grade 5 Grade 8 Proof Load (lbs.) Tensile Strength Min. (lbs.) Proof Load (lbs.) Tensile Strength Min. (lbs.) Proof Load (lbs.) Tensile Strength Min. (lbs.)
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