Stainless Steel
Stainless Steel
Material Info
About
CNC Stainless Steel is a precision-machined metal available in two austenitic grades, produced using multi-axis CNC milling from certified stainless stock. Both grades offer excellent corrosion resistance, good strength, and full weldability — the right choice for functional prototypes, end-use parts, and components where hygiene, corrosion resistance, or structural integrity are non-negotiable. Available with a range of surface finishes including powder coating. For grade selection advice or finish questions, reach out to [email protected]. For a full grade comparison, download the Grade Overview Sheet.
| Grade | Alloy | Tensile Strength | Yield Strength | Corrosion Resistance | Chloride Resistance | Primary Use |
|---|---|---|---|---|---|---|
| 304 | X5CrNi18-10 | 500–700 MPa | 205 MPa min | Excellent | Limited | General purpose, food, architecture |
| 316L | X2CrNiMo17-12-2 | 500–700 MPa | 200 MPa min | Superior — Mo addition | Good — Mo addition | Marine, medical, chemical |
Color & Finishes
304, 316L
304, 316L
Our standard finish, direct from the cutting tool with a clean machined surface at Ra 3.2 μm.
A durable polymer coating cured in an oven, available in any RAL colour — specify your required colour in the order notes.
A finer surface finish of Ra 1.6 μm is readily available on request — add your required Ra value and the surfaces it applies to in the order notes.
Technology
- CNC
Material Properties
Description
Design Guidelines
Bounding Box
Maximum Bounding Box
3-axe: 480 x 280 x 80mm
5-axe: 480 x 180x 80mm
Minimum Bounding Box
X + Y + Z > 12 mm
The bounding box is a 3D imaginary outline of a box that encloses the smallest area occupied by your model. Your model must be within the minimum and maximum bounding box sizes. If the size of the model is close to the maximum bounding box, then the printing orientation will be restricted.
Walls
Minimum wall thickness: 1.5 mm. Recommended: 2.5 mm or greater.
A supported wall is connected at least on two sides of the wall, while an unsupported wall is connected only on one side of the wall. Walls that do not meet the minimum requirements may not survive printing and cleaning processes. Additionally, models may still be rejected based on the wall geometry of the model. Please consider the size of your model and reinforce the walls or add support structures as needed as minimum guidelines will not always be adequate for large models.
Wires
Minimum feature width: 0.8 mm. Recommended: 1.5 mm or greater.
Minimum feature width: 1.5 mm. Recommended: 2.0 mm or greater.
A wire is a circular, rectangular or even triangular feature that is thinner in its unconnected directions than its length. A supported wire is connected at least on two sides of the model, while an unsupported wire is connected on one side of the model. Wires that do not meet the minimum requirements may not survive printing and cleaning processes. Additionally, models may still be rejected based on the wire geometry of the model. Please consider the size of your model and reinforce the wires or add support structures as needed as minimum guidelines will not always be adequate for large models.
Clearance
Minimum clearance between separate features: 0.2 mm. For assemblies or press-fit features, specify the required fit class (e.g. H7/h6) in your technical drawing.
Clearance is the space between two individual parts in a model. If the space among the individual parts do not meet the minimum clearance, then parts can fuse together or can be difficult to clean. This is important for movable pieces like hinges, gears, etc.
Interlocking & Enclosed Parts
Interlocking
No
Enclosed
No
Parts in File
1
Accuracy
Where no tolerance is specified, parts are manufactured to DIN ISO 2768-mK (fine class general tolerances) as standard — see our CNC Tolerance Reference Sheet for full details. For tighter or specific tolerances, attach a technical drawing with the required tolerances clearly called out
Related Materials
High Strength, Durability
Chemical resistance
Low moisture absorption
High Accuracy
High ductility
Very high stiffness
High Accuracy