Under the ASTM A453 standards, the A453 660 has been the most commonly requested class for bolts and nuts. Boltings fabricated from these materials are good for use in high temperature service for pressure vessel and valve flanges. There has been mention (although not conclusive) that the maximum operating temperature of A453 660 bolts is 650 deg Celsius.
With the more demanding conditions, Chin Yuan has brought about a new product combination with further performance enhancements – A453 660 with Xylan Coating. With its high corrosion resistance properties, the bolts are enhanced further with better lubricity. A few combinations of bolts and nuts include:
A453 660 (Plain)
A453 660 C/W Xylan 1070
A453 660 C/W Xylan 1424
A453 660 C/W Xylan 1014