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This standard defines property classes, the metric equivalent of a screw grade, that are almost identical to those defined by ISO 898-1, [2] except for the addition of the 8.8.3 and 10.9.3 classes. These two additional standards are fasteners that have the same mechanical properties as their base property class (i.e. 8.8 and 10.9), but are made ...
ASTM A490 and ASTM A490M are ASTM International standards for heavy hex structural bolts made from alloy steel.The imperial standard is officially titled Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength, while the metric standard (M) is titled Standard Specification for High-Strength Steel Bolts, Classes 10.9 and 10.9.3, for Structural ...
ISO 898 is an international standard that defines mechanical and physical properties for metric fasteners. This standard is the origin for other standards that define properties for similar metric fasteners, such as SAE J1199 and ASTM F568M. [1] It is divided into five (nonconsecutive) parts: 1.
Because electrolytically zinc-plated surfaces provide comparatively little corrosion protection, and in the case of galvanic zinc coatings on high-strength steel (e.g. category 10.9 and 12.9 high-strength bolts) there is a risk of hydrogen embrittlement, the industry needed a better corrosion protection system.
Tamper-resistant versions with a pin in the recess are available. Metric sizes of the hex socket are defined by ISO 4762 (socket head cap screws), ISO 4026 (socket set screws with flat point), ISO 4027 (socket set screws with cone point), ISO 4028 (socket set screws with dog point), and ISO 4029 (socket set screws with cup point).
ISO Metric Trapezoidal Screw Thread; Allowances and Tolerances for Trapezoidal Screw Threads of General Purpose: Active: DIN 103-4: ISO Metric Trapezoidal Screw Thread; Nominal Dimensions: Active: DIN 103-5: ISO Metric Trapezoidal Screw Threads; Limiting Sizes for Nut Threads from 8 to 100 mm Nominal Diameter: Active: DIN 103-6
Class 4.8 Low or medium carbon steel; fully or partially annealed 1.6–16 310 45 340 49 420 61 B71–95 Class 5.8 Low or medium carbon steel; cold worked 5–24 380 55 420 61 520 75 B82–95 Class 8.8 [43] Medium carbon steel; quench and tempered Under 16 (inc.) 580 84 640 93 800 120 17–72 600 87 660 96 830 120 C23–34 Class 8.8 low carbon
Specific modulus is a materials property consisting of the elastic modulus per mass density of a material. It is also known as the stiffness to weight ratio or specific stiffness.
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