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CNC Machining
Mild Steel A36 is the most widely used hot-rolled structural steel. It combines good strength with toughness and ductility, making it a dependable, cost-effective choice for general engineering. We supply Mild Steel A36 CNC parts across the UK, from single prototypes to production runs.
Its excellent weldability and formability allow it to be cut, drilled, punched, tapped and machined with ease, so it suits both prototypes and production parts. As a result it is often specified for bolted & welded structures, base plates, brackets & frames and jigs, fixtures & templates. Its quoted tensile strength of around 550 MPa gives a useful guide when sizing parts.
Components are CNC milled or turned and left as-machined unless a finish is specified. Painting, plating or oiling is recommended to protect against rust. Send us a STEP file and we will quote your Mild Steel A36 CNC parts promptly, with UK-wide delivery.
Material
Mild Steel A36
Description
Strengths
Lead time 10 business days. Tough, ductile structural steel with excellent weldability; easy to drill, tap, punch and grind.
Weaknesses
Rusts easily without a finish
Silver grey
Ultimate tensile strength
550 MPa
Yield strength
290 MPa
Modulus of elasticity
200 GPa
Elongation at break
22%
Density
7.85 g/cm³
Hardness
92 HRB
Shear modulus
79.3 GPa
Corrosion resistance
Low
UK equivalent
Maximum service temperature
Not specified
Thermal expansion coefficient
11–11.7 × 10⁻⁶ /°C
Thermal conductivity
Not specified
Electrical resistivity
Not specified
Post-processing
Welding, grinding, drilling
Recommended finish
Coating, plating or oil
Bolted & welded structures
Base plates, brackets & frames
Jigs, fixtures & templates
Sprockets, cams & gears
Values shown are typical supplier figures for Mild Steel A36 and may vary with stock condition. Please confirm critical properties before production.
Yes. A36 is a tough, ductile structural steel that is easy to drill, tap, punch and grind, which makes it ideal for plates, brackets and frames.
A36 is mainly used for structural parts; for very fine precision features a free-machining or bar grade may be more suitable. Achievable tolerances depend on part size, geometry and features, so mark any critical tolerances on a 2D drawing with your upload and they will be reviewed and confirmed in your quote.
Yes. A36 has excellent weldability and is widely used for bolted and welded structures. It rusts easily, so a coating, plating or oil finish is recommended.
Typical uses include bolted and welded structures, base plates, brackets and frames, jigs, fixtures and templates, and sprockets, cams and gears.
A36 is a structural plate steel suited to welded frames and brackets. 1018 is a cold-finished bar grade with better machined finish and suitability for case hardening. Choose 1045 for higher strength.
The typical lead time shown for A36 steel is 10 business days from an approved order. Quantity, finishing and any heat treatment can affect this, and your quote confirms the date before you order.
Parts in as fast as 10 business days
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