AISI/SAE 1335 is the higher-carbon sibling of 1330 in the manganese carbon steel family, carrying 0.33–0.38% carbon alongside the same elevated 1.60–1.90% manganese range. That manganese level is well above what a plain carbon steel like 1045 carries, and it's the main driver of this grade's mechanical properties: it deepens hardenability so the steel can develop a more uniform hardness through thicker cross-sections during heat treatment, and it adds meaningfully to strength beyond what the carbon content alone would provide.

The slightly higher carbon compared with 1330 pushes tensile strength and hardness potential up another notch, making 1335 a common pick for structural and general mechanical components that see higher loads or need a bit more wear resistance after heat treatment — gears, shafts, axles, and similar load-bearing parts. Like other manganese carbon steels, it offers a meaningful step up in hardenability over an unalloyed grade without the added cost and complexity of a chromium-molybdenum alloy system.

1335 machines similarly to 1330 but requires a bit more respect for tool wear and work hardening, since both its carbon and manganese sit at the upper end of the manganese carbon steel range. The higher manganese raises strength and hardness relative to a plain carbon steel with comparable carbon content, which increases cutting forces and heat generation at the tool tip. There are no hard alloy carbides here, so wear is driven more by adhesion and heat than by pure abrasion, but the combined effect of carbon and manganese still shortens tool life compared with a lower-alloy grade.

Chip control is generally reasonable in the annealed or normalized condition, with a standard chipbreaker geometry producing manageable chips. As with any manganese-rich steel, dwelling on the surface with a dull edge or taking overly light finishing passes can locally work-harden the material and make subsequent passes noticeably tougher to start cleanly, so steady feeds and sharp edges pay off.

Because parts made from 1335 are frequently heat-treated after rough machining, it's common practice to remove the bulk of the material in the softer pre-hardened condition and reserve tighter tolerances for after quenching and tempering. A tough, coated carbide grade with a positive rake and reliable coolant supply generally gives the most consistent results across the hardness range this steel is supplied in.