ASTM A490 BOLTS
1. What is an ASTM A490 Bolt?
ASTM A490 bolts are high-strength hex head structural bolts manufactured by Bulong Quang Thai following ASTM standards from the United States. These bolts, including ASTM A490 and A490M, are made from alloy steel and have a minimum tensile strength of 150 ksi, equivalent to a strength grade of 10.9. They are similar to ASTM A325 bolts but are crafted from alloy steel instead of medium-carbon steel.
At Bulong Quang Thai, we manufacture ASTM A490 bolts directly in our factory, ensuring they meet all required certifications and standards. Our commitment is to provide high-quality A490 bolts at the most competitive prices on the market.
2. Key Features of ASTM A490 Bolts
Material
• Type 1: Medium carbon steel, alloy steel
• Type 3: Weathering steel (Corten steel)
Sizes & Standards
ASTM A490 and A490M bolts are produced according to ASME B18.2.6, similar to ASTM A325 and A325M, but with material differences.
Surface Treatment
At Bulong Quang Thai, ASTM A490 bolts can be treated using the following methods:
• Hot-dip galvanizing
• Electroplating (white-blue zinc, gray zinc, yellow zinc)
• Dacromet or Geomet coating
• Black oxide (bluing)
However, hot-dip galvanizing and electroplating are not recommended for A490 bolts due to the risk of hydrogen embrittlement, which can cause cracking or failure. Instead, ASTM allows alternative corrosion-resistant aluminum/zinc coatings such as ASTM F1136 Grade 3 (Dacromet coating).
3. Applications of ASTM A490 Bolts
In addition to their common uses similar to A325 bolts, ASTM A490 bolts are particularly suited for applications requiring high strength and hardness, such as:
• Bridge and highway construction
• Steel structures in factories and industrial zones
• Pipeline connections in the oil and gas industry
• Ports, harbors, and shipbuilding
• Electrical equipment assembly and connections
4. Pricing of ASTM A490 Bolts
The cost of ASTM A490 bolts varies based on several factors:
• Type: Different grades and shapes of A490 bolts have varying prices. For example, heavy-duty A490 bolts cost more than standard ones.
• Size: Larger diameters and longer bolts are generally more expensive. For instance, an A490 M42 bolt costs more than an A490 M39 bolt, and an A490 M20x120 bolt is priced higher than an A490 M20x100 bolt.
• Surface Treatment: Coating methods affect pricing due to their durability and corrosion resistance. For example, hot-dip galvanizing is more expensive than electroplating because it provides superior corrosion resistance.
5. Why Choose ASTM A490 Bolts from Bulong Quang Thai?
Bulong Quang Thai is a leading manufacturer and distributor of ASTM A490 and A490M bolts in Southern Vietnam. We are known for our high-quality structural bolts and competitive pricing. Our priority is delivering reliable products that meet international standards, ensuring durability and performance in critical applications.
If you are looking for high-quality ASTM A490 bolts, feel free to contact us at +84 933 220 468. We look forward to serving you!
