A grade 5 hardness bolt is a bolt made of medium carbon steel and depending on the manufacturer can either be or not heat treated.
Grade 10.9 bolts or capscrews have a minimum tensile strength of 1040N/mm2 and a hardness of 320 - 380Hv10. Grade 12.9 bolts or capscrews have a minimum tensile strength of 1220N/mm2 and a hardness of 385 - 435Hv10. The 12.9 fastener is therefore a higher grade (hardness and tensile strength) fastener compared with 10.9 grade
The Rockwell C Hardness for a grade 10.9 fastener is 32 - 39HRC or 320 - 380Hv10
Minimum hardness of Mild steel is about 140 Vickers hardness.
grade refers to composition and strength. Generally a higher Grade ( number or alphabet) is a stronger material. For example Grade C is stronger than Grade A Grade 8 bolt is stronger than grade 5 bolt.
ASTM is the exact chemical composition of metals. ASTM a 234 WPC is a grade of stainless steel and it is often in the form of nuts or bolts.
A bolt with hardness Rc 27-34 falls under the Grade 5 category. Grade 5 bolts are medium carbon steel that is quenched and tempered for increased strength and hardness. They are commonly used in automotive and general engineering applications.
Grade 10.9 bolts or capscrews have a minimum tensile strength of 1040N/mm2 and a hardness of 320 - 380Hv10. Grade 12.9 bolts or capscrews have a minimum tensile strength of 1220N/mm2 and a hardness of 385 - 435Hv10. The 12.9 fastener is therefore a higher grade (hardness and tensile strength) fastener compared with 10.9 grade
The grade of bolts refers to their strength and load-bearing capacity, which is determined by their material composition and manufacturing process. Commonly, bolt grades are indicated by a number (such as Grade 2, Grade 5, and Grade 8 in the U.S.) or by a marking system that denotes their tensile strength and hardness. Higher-grade bolts can withstand greater stress and are used in more demanding applications. Understanding the grade is essential for ensuring the proper selection of bolts for specific engineering and construction tasks.
They replace the factory body mounting bolts.
The Rockwell C Hardness for a grade 10.9 fastener is 32 - 39HRC or 320 - 380Hv10
Hardness
A grade 2 washer typically has a hardness ranging from 80-100 Brinell. This hardness level makes it suitable for general-purpose applications where high strength is not required.
27 to 36
Correct, a 5 hardness can scratch a 5 and below.
A grade in bolts refers to the classification that indicates the specific mechanical properties of the bolt, such as tensile strength and yield strength. Different grades are denoted by numbers or markings, with higher grades typically indicating stronger and more durable bolts. For example, in the United States, common grades include Grade 2, Grade 5, and Grade 8, each with increasing strength specifications. It's important to select the appropriate grade for the intended application to ensure safety and reliability.
The Hardness is 6-5-3
About 5 on Moh's hardness scale.