Grade rating on bolts
15 Feb 2013 Tensile Bolt Grading. When purchasing high tensile bolts, there are two main grades you should be aware of: 'S' and '8.8' Many times, two According to SAE specifications ,as the grade of the fasteners increases, so does the bolt's strength. The grade of a bolt and its manufacturer are identified on the Alternate systems exist for unified inch series bolts and screws in carbon and alloy steels. Bolts are typically marked on the head to show the grade of the bolt and Automotive suspension fasteners don't correspond to SAE or metric strength grading systems, they are made under very different standards for 15 Feb 2019 A grade 8 bolt will have 6 radial lines on its head. Metric bolts are a bit more straight forward, usually having their strength class number stamped Nominal Dia of Products and Threads per in. Stress Area. sq. in. Grade 2. Grade 5.
The difference in strength between different grades is quite dramac: the highest standard grade being capable of carrying more than three mes as much load as
SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! - the most efficient way to navigate the Engineering ToolBox! Steel Bolts - SAE Grades - SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength; Steels - Endurance Limits and Fatigue Stress - Endurance limits and fatigue stress for steels; Threaded Bolt Stress Area - Threaded bolts tensile stress area; US Bolts - Head and Wrench Sizes - Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt Grade 5 bolt capability in yield (stretch) = 92,000 lbs / in2 x .03349 in2 = 3081 lbs minimum Grade 5 bolt capability in tension (failure) = 120,000 lbs / in2 x .03349 in2 = 4019 lbs minimum Again, you can see that the grade 8 will support over 1000 lbs more or a 1/2-ton more. Identifying bolt grades and head markings for US grades 2, 5 and 8. Metric grades 8.8.,10.9 and 12.9 (socket products). Hex Bolt Identification, Markings and Strength Chart Table Guide. Hex Bolt Identification, Markings and Strength Chart. Additonal information on bolts is located at the bottom of the webpage. Note: Some bolts share identical head identification and have significantly different strengths. In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock the nut must be additionally marked with the letter ‘B’.
Hex Bolt Identification, Markings and Strength Chart Table Guide. Hex Bolt Identification, Markings and Strength Chart. Additonal information on bolts is located at the bottom of the webpage. Note: Some bolts share identical head identification and have significantly different strengths.
There are also lower grade metric bolts which should be avoided. In SAE there are 2 commonly used grades, 5 and. 8. Grade5 is identified by three bars on the grade of tolerance and allowance specified for a thread. rating or aligning functions at assembly. used for the bulk production of screws, bolts, and nuts. 7 Nov 2014 Inch fasteners, which are more common in North America, will have a grade or a rating from the American Society for Testing and Materials.
Inch fasteners—those commonly used in North America—will have a grade or ASTM rating. Property class (often just "class") specifies metric fasteners. Special
They are similar to Grade 8 but have a tensile strength of 180,000 psi compared to Grade 8 at 150,000 psi. Wholesale Grade L9 Fasteners. L9 hex cap screws · L9 First, you need to be able to identify bolts by the different grades when you go to the So given a certain diameter (cross-sectional area) and strength rating,. Its strength grades are indicated by the letter A plus three numerals stamped on the bolt head. Common ASTM grades include A307, which roughly corresponds to SAE Grade 2. An ASTM A325 bolt is roughly equivalent in strength to SAE Grade 5 and an A490 bolt is about equivalent in strength to SAE Grade 8. US Bolts: Head Marking Grade and Material Nominal Size Range (inches) Mechanical Properties ; Proof Load (psi) Min. Yield Strength (psi) Min. Tensile Strength (psi) No Markings: Grade 2 Low or medium carbon steel: 1/4" thru 3/4" 55,000: 57,000: 74,000: Over 3/4" thru 1-1/2" 33,000: 36,000: 60,000: 3 Radial Lines: Grade 5 Medium carbon steel, quenched and tempered: 1/4" thru 1" SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! - the most efficient way to navigate the Engineering ToolBox!
Property Class, SAE J429-Grade 8. Hardness (HRC), 33-39. Surface Hardness ( 30N), 58.6 max. Tensile Strength (psi), 150,000 min. Yield Strength at 0.2%
15 Feb 2019 A grade 8 bolt will have 6 radial lines on its head. Metric bolts are a bit more straight forward, usually having their strength class number stamped Nominal Dia of Products and Threads per in. Stress Area. sq. in. Grade 2. Grade 5. 22 Nov 2013 Standard thread stainless bolts are rated as 18-8 and have roughly the same yield and tensile strength as a Grade 5 bolt. Metric stainless bolts
Steel Bolts - SAE Grades - SAE steel bolts - grades ranging grade 1 to 8.2 - proof and tensile strength; Steels - Endurance Limits and Fatigue Stress - Endurance limits and fatigue stress for steels; Threaded Bolt Stress Area - Threaded bolts tensile stress area; US Bolts - Head and Wrench Sizes - Hex Bolt, Lag Bolt, Square Bolt and Heavy Hex Bolt Grade 5 bolt capability in yield (stretch) = 92,000 lbs / in2 x .03349 in2 = 3081 lbs minimum Grade 5 bolt capability in tension (failure) = 120,000 lbs / in2 x .03349 in2 = 4019 lbs minimum Again, you can see that the grade 8 will support over 1000 lbs more or a 1/2-ton more. Identifying bolt grades and head markings for US grades 2, 5 and 8. Metric grades 8.8.,10.9 and 12.9 (socket products). Hex Bolt Identification, Markings and Strength Chart Table Guide. Hex Bolt Identification, Markings and Strength Chart. Additonal information on bolts is located at the bottom of the webpage. Note: Some bolts share identical head identification and have significantly different strengths. In addition to the indicated grade marking, all grades, except A563 grades O, A and B, must be marked for manufacturer identification. The markings shown for all grades of A194 nuts are for cold formed and hot forged nuts. When nuts are machined from bar stock the nut must be additionally marked with the letter ‘B’.