Hot Rolled Alloy Spring Manufacturer
Coiling Technologies is a hot-rolled alloy spring manufacturer specializing in fabricating custom products. Hot-rolled alloy springs have desirable properties such as shock resistance, toughness, and flexibility.
Manufacturing Process
Hot-rolled steels are manufactured by processing material at temperatures above the material's recrystallization temperature.
These materials can be galvanized, heat treated, and coated to make them more reliable and for added corrosion resistance.
Types of Hot-Rolled Steel for Springs
Types of hot-rolled steel for springs include:
- AISI 5160: This is a high carbon and chromium spring steel. Its properties include toughness, fatigue resistance, and high ductility. It is used especially in the automotive industry for heavy springs, including leaf springs.
- ASTM A29: This standard specification includes A689 spring steel. A689 is used to manufacture general-purpose springs, including leaf, coil, and torsion.
- SAE J412: This steel is equivalent to AISI 1050, an economical, heat-treatable annealed spring steel. It has good hardening properties and a good grain structure.
- AISI 4161: This is a low-alloy steel. It is resistant to abrasion, impact, and fatigue. It also has relatively high hardenability. It is used in moderately heavy-duty springs.
- AISI 6150: This chromium vanadium-type spring steel is used in automotive valve springs and leaf springs. It is easily heat treated and has low distortion properties.
As a hot-rolled alloy spring manufacturer, CTI can customize springs from any of these materials.
Industries Using Hot-Rolled Alloy Springs
Hot-rolled steel is for applications where finished surface quality is not critical. Industries that use them include automotive, aerospace, petrochemical, heavy equipment, agriculture, and mining.
Coiling Technologies Is Your Custom Hot-Rolled Alloy Spring Manufacturer
CTI uses various types of hot-rolled alloy steels to fabricate a range of custom springs. As a custom hot-rolled alloy spring manufacturer, we can produce any type of spring your project requires. Contact us online or call us today at 1-800-969-2645 to request a quote for hot-rolled alloy springs.
Hot Rolled Alloy Spring Manufacturer FAQs
What is a hot rolled alloy spring?
Hot rolled steel is processed above the material's recrystallization temperature, which allows heavy sections to be formed without the forces a cold process would demand. Hot rolled alloy spring steels bring shock resistance, toughness, and flexibility, and they are the material class used when a spring is too large or too highly loaded for pre-tempered cold drawn wire. The trade is surface finish. Hot rolled steel is used where finished surface quality is not critical, so surface condition and decarburization both need attention when the finished part is fatigue loaded.
Which hot rolled grades does CTI use for springs?
Grades listed for spring work are AISI 5160, a high carbon chromium spring steel with toughness, fatigue resistance, and high ductility used for heavy automotive springs including leaf springs; ASTM A29, which covers A689 spring steel for general purpose leaf, coil, and torsion springs; SAE J412, equivalent to AISI 1050, an economical heat treatable annealed grade with good hardening properties and grain structure; AISI 4161, a low alloy steel resistant to abrasion, impact, and fatigue with relatively high hardenability for moderately heavy duty springs; and AISI 6150, a chromium vanadium grade for automotive valve springs and leaf springs that heat treats easily with low distortion.
How do I choose between these hot rolled grades?
Start with section size and load, since that combination is what pushes a design out of pre-tempered wire in the first place. 5160 is the default for heavy leaf and coil suspension work. 4161 adds molybdenum for hardenability in thicker sections. 6150 adds vanadium for shock and vibration resistance with low heat treat distortion. AISI 1050 and its SAE J412 equivalent are the economical option for low stressed and static parts. Operating temperature, whether the load is static or cycling, and any hardness cap from a standard such as NACE MR0175/ISO 15156 narrow the choice further.
What heat treatment do hot rolled alloy springs require?
Hot rolled alloy grades arrive without a mill temper, so springs are formed and then austenitized, quenched, and tempered to reach working tensile strength and fatigue properties. Tempering temperature sets the balance between strength and toughness. Decarburization during hot processing removes carbon from the surface layer and reduces fatigue life, so furnace atmosphere control and surface inspection both matter on a dynamic part. Shot peening after heat treatment puts the surface into residual compression and extends fatigue life. Coiling Technologies performs heat treating, shot peen, and non-destructive testing in house in Houston.
Which industries use hot rolled alloy springs?
Listed industries are automotive, aerospace, petrochemical, heavy equipment, agriculture, and mining. Those applications share heavy sections, high loads, and tolerance for a working rather than cosmetic surface finish. CTI serves that work directly, with military suspension springs and large or heavy duty springs called out as shop specialties, and a customer base that includes Fortune 500 companies, the automotive aftermarket, the US Military, and other government agencies. Powder coating and other finishing are available in house where the operating environment requires corrosion protection, since none of these alloys resist corrosion on their own.
What details does CTI need to quote a hot rolled alloy spring?
Provide the spring type, bar or wire diameter, free length and diameters, the load or rate required at working height, total deflection, whether loading is static or cyclic, operating temperature, and finish. Add any material standard, hardness limit, or inspection requirement the program imposes. A finished drawing is ideal, a design specification with load and geometry requirements works, and a performance requirement with a rough concept is enough for CTI's engineering team to develop a design. Contact CTI online or call 1-800-969-2645 to start a quote.
