Posted in | Steels

Free Cutting Mild Engineering Steel - EN1A (230M07)

EN1A (230M07) from Thames Stockholders is a commercial cold drawn bright mild steel product which is called a ‘free cutting’ material due to its suitability for use on CNC machines as well as automatic lathes. EN1A is suitable for use in the manufacture of repetitively turned parts and should be chosen for applications where exceptional machinability is a crucial factor.

Typically supplied in bright form, this non-alloyed, low carbon-manganese engineering material can also be case hardened to boost greater wear resistance although the product is not suggested for basic case hardening work. EN1A is available in both unleaded and leaded versions, increased lead content improves total machinability making EN1A an ideal choice for complex machining and drilling operations.

Machinability

The positive machinability features of EN1A also results in the longevity and extension of tooling life which makes this engineering steel an economical solution. It is mainly suited for component manufacture where the product is not exposed to extreme service stresses and where an excellent finish is necessary under high volume production rates. EN1A (230M07) should be machined at high speeds with automatic feeds using a general-purpose carbide tool. The majority of machining lubricants are effective during the manufacturing process although it should be taken into account that cutting oils can result in some surface staining.

The inclusion of sulfur and manganese in the products’ chemical composition essentially serves as a ‘chip breaker’ which allows it to be fed and machined at high speeds without affecting overall tooling life.

In comparison with standard mild steel, EN1A (230M07) offers many benefits including an increased straightness, a cleaner finish, and much tighter sectional tolerances. As EN1A is cold drawn, it can be brought a lot closer to the finished machine size and this has a positive influence on general machining costs. Cold drawn products of this type also provide a substantial increase in strength when compared to related hot rolled bar products. Another advantage is that Thames Stockholders stock EN1A (230M07) in a wide range of sizes and shapes which, because of the availability of incremental sizes, may negate the need for customers to machine the material down before fabrication.

Other Characteristics

Although EN1A can be welded, it is not recommended as the percentage lead content makes this tough. It is also advised that the product is not utilized in the manufacture of hollow parts since the product’s traverse properties are not so good. Besides outstanding machinability, EN1A also provides reasonable strength and ductility.

Applications

EN1A (230M07) can be used in a wide range of commercial applications such as:

  • Brake pistons, wheel nuts, and inserts
  • Brake hose ends, hydraulic parts
  • Control linkages, low-stress hubs, shafts, casings and handles
  • Padlock vice jaws, shackles
  • Nuts, studs, and bolts
  • Gearbox components (if case-hardened)

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