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ASTM A453 Grade 660 Class A Bolts are premium fasteners recognized for exceptional strength and corrosion resistance. Made of alloy steel with high nickel-chromium content, these bolts excel in harsh environments such as petrochemical plants, offshore installations and power generation facilities. While meeting stringent ASTM standards, they ensure that it is reliable and durable in critical applications where safety Bonding is required. ASTM A453 Grade 660 Class A bolts provide mechanical strength and corrosion resistance, making them essential for applications requiring high tensile strength and long life under harsh 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 |
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We offer These ASTM A 453 GR 660 Class A Bolts as per DIN, ISO, JIS or ANSI Standard.
ASTM A 453 GR 660 Class A Bolts applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries 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 generally exhibit resistance to galvanic corrosion due to their alloy composition, which includes corrosion-resistant elements like nickel and chromium. These elements form protective oxide layers that mitigate galvanic reactions when in contact with dissimilar metals. However, in environments prone to galvanic corrosion, such as marine settings, it’s advisable to apply proper material selection and surface treatments to further enhance their resistance and ensure prolonged durability. Regular maintenance and adherence to industry standards also contribute to maintaining their resistance to galvanic corrosion over time.
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