AISI 1035 carbon steel is a higher carbon version of AISI 1030 steel, with a carbon content of 0.32-0.38% and 0.60-0.90% manganese. The increased carbon provides AISI 1035 steel with higher hardness and strength than AISI 1030, while still retaining reasonably good ductility and formability. AISI 1035 steel is used in applications that require more strength than can be provided by lower carbon steels, such as connectors, bolts, and shafts.
Given its chemical composition and properties, several steel grades can be considered equivalent substitutes for AISI 1035 steel. One such equivalent is SAE 1035 steel. It has essentially the same composition, containing 0.32-0.39% carbon and 0.60-0.90% manganese. SAE 1035 steel will have very similar mechanical and physical properties to AISI 1035 steel. It can directly replace AISI 1035 in most applications.
Another equivalent is EN8 steel or C35 steel. This European steel grade also has a carbon content of 0.32-0.39%. It will have comparable properties to AISI 1035 and can be used in the same types of applications. However, its manganese content is on the lower end of the range at 0.50-0.80%. So it may have slightly lower hardenability than AISI 1035 or SAE 1035 steel. But for most purposes, it can still substitute effectively for AISI 1035 steel.
A final equivalent is 1040 carbon steel, with a carbon range of 0.37-0.44% and 0.60-0.90% manganese. Due to its higher carbon content, 1040 steel has greater hardness and strength than AISI 1035 steel. However, it also has lower ductility and weldability. So while 1040 steel can be used in higher-strength applications as a replacement for AISI 1035 steel, formability and weldability may be compromised. The higher strength of 1040 steel needs to be balanced against its lower ductility for a given application.
The most direct equivalent materials for AISI 1035 steel are SAE 1035 steel and C35 or EN8 steel. They have essentially the same chemical composition and properties, with comparable strength, hardness, formability, and weldability. Either of these steels can substitute directly for AISI 1035 steel. 1040 steel can also replace AISI 1035 steel where higher strength is required, but it may be limited by lower ductility and weldability. The exact choice of equivalent steel depends on the strength, hardness, and fabrication needs of a specific application.
AISI 1035 steel has a range of equivalent materials with both comparable as well as enhanced properties. These equivalents provide options for substitution when AISI 1035 steel is not available or suitable for an application. With similar or nearly identical composition and properties, they can often be direct drop-in replacements. But where higher performance is needed, there are also equivalents with increased strength, though at the expense of lower ductility and formability. Selecting the appropriate balance of properties allows equivalents to optimally replace AISI 1035 steel for a given application.