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What grade is a galvanized bolt?

What grade is a galvanized bolt?

What grade is a galvanized bolt?

Grade 2, 5, and 8 are usually plated with a slightly blue-ish or yellow zinc coating, or are galvanized, to resist corrosion. Bolts are typically marked on the head to show what grade bolt they are. Note that, in addition to the grade marking, many bolts also have a manufacturer's mark.

What steel is a Grade 8 bolt made of?

medium carbon alloy steel Grade 8 (SAE J429) is a medium carbon alloy steel with one of the highest tensile strengths available. With a minimum tensile strength of 150 ksi and a minimum yield of 130 ksi, Grade 8 has a higher tensile and yield strength than other steel grades such as Grade 5 and B7.

What does Grade 8 mean for a bolt?

Grade 8 bolts are designated as a 150 ksi. This means its tensile strength or the resistance it has before it is subject to breaking under tension is equal to 150,000 lbs. per square inch. In comparison, a Grade 5 bolt is weaker as its tensile is 120 ksi, placing it at 120,000 lbs.

Are Grade 8 bolts hardened steel?

Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head. Grade G is roughly equivalent to Grade 8.

Are stainless bolts stronger than Grade 8?

Stainless commonly comes in grades 18.8 (304) or T316. Stainless steel bolts are rated for corrosion resistance. ... A stainless steel bolt has the same PSI rating as a grade 5 bolt (125,000 PSI). A grade 8 bolt has a stronger rating with a PSI of 150,000.

What is the hardest bolt you can buy?

Commercial-grade 8 bolts are the strongest option available. They're made from medium carbon alloy steel and have markings that include six raised dashes. The psi of the bolt is 150,000, meaning that it can withstand great deals of pressure because of the way it was quenched and tempered.

What is the metric equivalent to Grade 8?

Metric Bolt Conversion
Metric Nut ClassSAE J429 Normally UsedASTM Grades
5.

What bolt is stronger than Grade 8?

Grade 9 bolts are ideal for heavy-duty applications and are also often used in heavy machinery such as bulldozers. Not only are these bolts considerably stronger than they're grade 8 counterparts, but they are also considerably more resistant to corrosive elements as they are made with yellow zinc chromate.

Are stainless steel bolts stronger than Grade 8?

Stainless commonly comes in grades 18.8 (304) or T316. Stainless steel bolts are rated for corrosion resistance. ... A stainless steel bolt has the same PSI rating as a grade 5 bolt (125,000 PSI). A grade 8 bolt has a stronger rating with a PSI of 150,000.

What is the highest grade of bolt?

grade 8 bolt A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5. A grade 8 bolt would be one that meets ASTM A490 standards.

Can a Grade 10.9 bolt be galvanized?

ISO Grade 10.9 bolts (BS4395: Part 2 or ASTM A490) are galvanized in the UK, Japan, Italy, France and Germany but may require blast-cleaning as an alternative treatment prior to hot dip galvanizing. Grade 12.9 bolts and higher strength fasteners should not be galvanized.

What's the difference between Grade 8 and Grade 9 bolts?

Grade 8 bolts that are not galvanized or plated with yellow zinc, however, are cheaper. The yellow zinc plate on steel bolts counters the steel's vulnerability to corrosion from water contact.

What kind of galvanized bolts are used in the UK?

ISO Grade 10.9 bolts (BS4395: Part 2 or ASTM A490) are galvanized in the UK, Japan, Italy, France and Germany but may require blast-cleaning as an alternative treatment prior to hot dip galvanizing.

What's the difference between Grade 8 and yellow fasteners?

Deciding between Grade 8 bolts and yellow zinc-plated fasteners really relies on cost concerns and personal preference. According to K-T Bolt Manufacturing Inc., Grade 8 bolts "are used in demanding applications such as automotive suspensions.

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