U-bolts of grades 4.8 and 8.8
Grade 4.8 8.8 U-bolts And 304 Stainless Steel U-bolts,The 4.8 and 8.8 grades on the bolt refer to the strength grade of the bolt, and they differ in material.
4.8 grade bolt
4.8 grade bolts are generally made of low-carbon steel or medium carbon steel through heat treatment (quenching, tempering) process,
with a tensile strength level of about 400 MPa. They are generally used in situations where they can withstand moderate loads.
8.8 grade bolts
Grade 4.8 8.8 U-bolts And 304 Stainless Steel U-bolts,8.8 grade bolts are generally made of high-strength low-carbon alloy
steel or medium carbon alloy steel processed by overheating treatment (quenching, tempering) process,
with a tensile strength grade of about 800MPa, which has higher strength and toughness. They are generally used in situations that withstand high loads.
Therefore, grade 8.8 bolts have higher strength and toughness in terms of material, and can withstand higher loads,
while grade 4.8 bolts are suitable for medium load situations.
In addition, the grade of bolts is also related to factors such as dimensional accuracy and surface treatment,
so suitable bolts should be selected according to specific loads and requirements when using.
8.8 grade and stainless steel U-bolts
Grade 8.8 U-bolt is a high-strength bolt with high tensile strength.
Grade 8.8 means that the nominal tensile strength of the bolt is about 800MPa.
The yield strength is 0.8 times this value, which is 640MPa.
304 stainless steel U-bolts have good corrosion resistance.
The tensile strength is lower than grade 8.8.
The standard tensile strength of 304 stainless steel is usually between 500 and 700MPa.
Therefore, in terms of tensile strength, 8.8 grade U-bolts are generally better than 304 stainless steel U-bolts and can withstand greater tensile force.
However, in severe corrosive environments, 304 stainless steel U-bolts may be preferred.
