Home > Other Material > ASTM A 453 GR 660 Class A Bolts
ASTM A453 Grade 660 Class A Boltsare top-tier fasteners known for outstanding strength and resistance to corrosion. Constructed from alloy steel with a high nickel-chromium content, these bolts perform well in demanding settings like petrochemical plants, offshore rigs and power generation facilities. By complying with rigorous ASTM standards, they guarantee reliability and durability in vital applications where safety Bonding is needed. ASTM A453 Grade 660 Class A bolts deliver mechanical strength and corrosion resistance, making them indispensable for uses that demand high tensile strength and extended service life under severe operating conditions
|
Material |
Standards |
Size
|
Length |
|
ASTM A453 GR 660 Class A Hex Bolts
|
DIN975 , ASTM A307 |
M6 to M52 & 1/4″ to 2″
|
1000mm to 3000mm & 1feet to 12feet
|
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 895 min |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 585 min |
| Elongation in 4D (El) | 15 |
| Reduction | 18 |
|
Element |
Content |
|---|---|
|
Carbon |
0.08 max |
|
Manganese |
2.00 max |
|
Phosphorus, max |
0.040 max |
|
Sulfur, max |
0.030 max |
|
Silicon |
1.00 max |
|
Nickel |
24.0-27.0 |
|
Chromium |
13.5-16.0 |
|
Molybdenum |
1.00-1.50 |
|
Tungsten |
– |
|
Titanium |
1.9-2.35 |
|
Aluminum |
0.35 max |
|
Vanadium |
0.10-0.50 |
|
Boron |
0.001-0.010 |
At Koasteel, we take pride in being the largest supplier and manufacturer in the New Zealand, delivering advanced solutions for every one of your piping requirements. Featuring modern production facilities strategically situated in the New Zealand, we maintain an extensive inventory of more than 25,000 tons of top-quality materials kept ready in stock.
Get in touch with us for a fast quote tailored to your requirement.
We supply these ASTM A 453 GR 660 Class A Bolts in accordance with DIN, ISO, JIS or ANSI Standard.
ASTM A 453 GR 660 Class A Bolts serve applications as varied as the industries that rely on them, led chiefly by the aerospace, railway, construction and automotive sectors, along with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
ASTM A453 Grade 660 Class A bolts typically show good resistance to galvanic corrosion thanks to their alloy makeup, which contains corrosion-resistant elements such as nickel and chromium. These elements create protective oxide layers that reduce galvanic reactions when the bolts come into contact with dissimilar metals. That said, in settings where galvanic corrosion is likely, such as marine environments, it’s recommended to use appropriate material selection and surface treatments to further boost their resistance and guarantee lasting durability. Consistent maintenance and following industry standards also help preserve their resistance to galvanic corrosion over the long term.
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