ASTM A453 Grade 660 Low-Expansion High-Temperature Fasteners
Product features
ASTM A453 Grade 660 low-expansion high temperature fasteners deliver a nickel‑iron‑based alloy chemistry and heat‑treated microstructure that provide exceptional strength, oxidation and corrosion resistance at elevated temperatures. Their low coefficient of thermal expansion and dimensional stability under repeated thermal cycling create value through extended service life, reduced maintenance and predictable clamping performance in demanding applications such as aerospace and power generation. Precision threads, controlled tolerances and engineered head/shaft geometry ensure secure load transfer, compatibility with standard hardware and minimized creep and stress relaxation in high‑temperature joints.
Company profile
We are a specialized manufacturer of ASTM A453 Grade 660 low‑expansion, high‑temperature fasteners, combining metallurgical expertise with precision manufacturing to deliver reliable performance in demanding environments. Our vertically integrated facility controls alloy selection, heat treatment, and dimensional accuracy to meet strict aerospace, power‑generation, and industrial standards. Rigorous in‑house testing, traceable material certificates, and ISO-compliant processes ensure consistency and long service life at elevated temperatures. We offer custom machining, fast turnaround, and global logistics support to reduce downtime and installation risk. Partner with us for engineering guidance, certified quality, and supply stability for critical high‑temperature bolting applications, backed by decades' experience.
Why choose us
Our company specializes in manufacturing ASTM A453 Grade 660 low‑expansion, high‑temperature fasteners engineered for critical service in power generation, petrochemical, and aerospace applications. Combining precision forging, strict heat‑treatment control, and full ASTM compliance, we deliver components with exceptional creep resistance, minimal thermal expansion, and reliable mechanical strength at elevated temperatures. Quality assurance includes metallurgical analysis, tensile and hardness testing, and traceable material certification. We offer custom diameters, lengths, and finishes, responsive engineering support, and dependable global logistics. Focused on durability and performance, we help customers extend equipment life, reduce downtime, and meet demanding safety and regulatory requirements and industry standards.
xarella.huang@jm-fastener.comSince our establishment in 2006, JM has been adhering to the mission of creating maximum value for customers by providing differentiated services, and making a positive contribution to the society.