A metal name alone is not a forming specification. Alloy, temper, sheet thickness and geometry jointly determine feasibility, surface quality and process stability. Yield strength, elongation, anisotropy, springback, conductivity, friction, surface and downstream processing must be read together. A trade name without condition and certificate can mislead.
Three levels of material qualification
1. Standard materials
Aluminium, low-carbon steel, stainless steel, copper and brass are documented in Rosik’s current offer. Every part still requires review of grade, condition, thickness and geometry.
2. Special materials
Bronze, zinc, titanium-zinc, silver, titanium, nickel, selected nickel alloys and coated sheet are assessed case by case from complete material data.
3. Rare industry materials
Gold, palladium, niobium, tantalum, zirconium, Monel, Inconel, Hastelloy, Kovar and selected magnesium alloys occur in international metal spinning. Listing them is not a Rosik capability claim.
standard
Aluminium
Pure aluminium and aluminium alloys differ in ductility, strength and work-hardening response. Alloy family alone is insufficient: O, H and T tempers can change how a blank follows the mandrel. Soft sheet generally offers more forming reserve, while hardened material calls for larger radii and a more conservative sequence.
Aluminium combines low mass with useful stiffness, corrosion resistance and anodising options. Its surface is easily scratched or indented, so tooling cleanliness, lubricant, protective film and finishing sequence matter. Small radii and deep profiles concentrate strain and can expose tool marks.
Work hardening develops during spinning and demanding shapes may require intermediate annealing. Not every alloy accepts the same reduction or number of passes. Typical industry contexts include shades, covers, housings and lightweight axisymmetric parts; feasibility always follows the drawing and certified sheet data.
standard
Low-carbon and deep-drawing steels
Cold-rolled sheet usually provides a more controlled surface and thickness than hot-rolled material, where scale and roughness affect friction. Deep-drawing grades are designed for plastic deformation, yet delivery condition and prior strain remain decisive.
Steel offers high stiffness at practical cost but needs corrosion protection. Painting, plating or galvanising must be considered when setting radii, edges and allowances. Pressure and sliding can damage a zinc coating, so perfect coating retention cannot be promised for every shape.
Springback, hardness and work hardening affect pass planning and mandrel compensation. Previously bent or stamped stock does not behave like a fresh blank. These steels suit covers, bodies and technical components where stiffness, durability and cost outweigh low mass.
standard
Stainless steel
Austenitic, ferritic and duplex families have different ductility, work-hardening rates and springback. Austenitic grades may harden rapidly; ferritic sheet responds differently to rolling direction, while duplex commonly needs higher forces and must not be treated as ordinary austenitic stainless.
Higher loads require a rigid machine, stable mandrel and controlled support. Lubrication limits friction and heat, while clean tools reduce galling and surface contamination. Directional brushed finishes can reveal stretching and gloss changes after forming.
Satin finishing, polishing and passivation should be tied to the final requirement. Grade, delivery condition, film, grain direction and acceptable marks belong in the enquiry. The dedicated stainless spinning page owns the service intent; this page compares material behaviour.
standard
Copper
Selected copper grades offer high ductility, but purity, deoxidation route and delivery condition influence actual performance. High thermal conductivity disperses frictional heat quickly and changes lubrication conditions. Soft copper readily records minor tool marks.
Copper work-hardens as strain accumulates. Intermediate annealing may be considered for intensive multi-pass shapes, subject to grade, thickness and surface requirements. Patination, polishing and a technical finish each lead to different process decisions.
Copper is used for conductive, decorative, thermal and architectural components. Parameters from one grade cannot be transferred to another. Alloy designation, temper, conductivity and downstream joining reveal whether form, function or appearance is the priority.
mixed
Brass and bronze
Brasses differ with zinc content, phase structure and cold-working capability. Deep-forming grades may perform well, while others crack at tight radii or build resistance rapidly. Annealed, half-hard and hard conditions are not interchangeable.
Bronze is not one material: tin, phosphor and other groups have distinct properties. Bronze is therefore treated as a special material requiring exact identification. Slip lines, tool marks and gloss variation can be especially visible on brass and bronze.
Both groups appear in decorative parts, lighting, instruments and technical products. Colour, polishing, lacquering and acceptable marking should be defined. A separate copper-and-brass page covers the service; this guide remains comparative.
special
Zinc and titanium-zinc
Zinc and titanium-zinc sheets are sensitive to working temperature, rolling direction and radius. Architectural products are associated with EN 988 requirements, but compliance with a material standard does not make every spun geometry feasible.
The surface may be natural, pre-weathered or protected. Forming can alter appearance, and tight radii increase cracking risk. Handling and storage matter because moisture and incompatible contact can harm the finish.
Rosik qualifies zinc projects individually from manufacturer, designation, thickness, rolling direction, intended process temperature and appearance requirement. These sheets are not automatic substitutes for soft aluminium or copper.
special
Silver and precious metals
Silver combines exceptional conductivity with useful ductility in a suitable condition, but high material value changes trial, allowance and scrap planning. Fineness, additions and rolling condition must be known.
A polished surface exposes fine scratches, so tools, lubricant and cleaning need a special regime. Gold and palladium occur in niche international spinning applications, but are not automatically part of Rosik’s standard offer.
Every precious-metal enquiry requires individual agreement on material responsibility, accounting, grade, geometry and quality. This is technical context rather than a commercial promise.
special
Titanium
Titanium grades combine low density, corrosion resistance and strength, but do not share one formability profile. Annealed sheet behaves differently from hardened stock, while springback and forming resistance call for precise pass design.
Friction, galling tendency and surface sensitivity increase the importance of cleanliness and lubricant. Heat-assisted spinning exists in the industry, but this does not confirm that such a route is available for a particular Rosik project.
Assessment requires exact grade, certificate, thickness, radii, condition, surface and batch size. Titanium remains a special material; mentioning it does not guarantee every geometry or lead time.
special
Nickel and nickel alloys
Pure nickel and nickel alloys vary in heat resistance, corrosion resistance and hardening behaviour. Trade families such as Monel, Inconel and Hastelloy contain many compositions and conditions, so the family name cannot drive a technical decision.
High deformation resistance, springback and galling can load machine and tool. Lubrication, cleanliness, radii and staged forming must be evaluated. Severe-service alloys may also carry strict traceability duties.
Rosik reviews nickel-alloy enquiries individually. Full designation, standard, condition, certificate and service environment are required. Industry formability does not equal a confirmed company capability.
rare
Other special materials
Niobium, tantalum, zirconium, Kovar, selected magnesium alloys and other reactive or high-temperature alloys occur in global metal spinning. They are generally chosen for unusual vacuum, chemical, thermal or expansion requirements.
Each calls for specific knowledge of safety, reactivity, lubrication, cleanliness and heat treatment. Evidence from one alloy cannot be applied to an entire group. Sheet availability and certification may be as important as formability.
Listing a material does not mean that every geometry, thickness or quantity can be produced by Rosik. A technical review, resource confirmation and explicitly agreed scope are mandatory.
Temper, work hardening and annealing
Delivery condition records material history, not merely hardness. Annealed sheet generally has more deformation reserve; half-hard or hardened stock may reach a local limit sooner. Spinning changes thickness distribution and increases resistance through work hardening. Intermediate annealing can restore ductility but affects surface, dimensions, time and cost, so it is not a universal recipe.
Thickness, rolling direction and edge
Nominal thickness omits tolerance, uniformity and local thinning. Rolling direction introduces anisotropy, so a blank may flow differently around its circumference. Burrs, microcracks and cutting marks can initiate failure. Blank diameter, cutting quality and orientation to the coil belong in process planning.
Friction, lubrication and tooling
Lubricant does more than reduce force: it controls sliding, heat, marking and galling. It must suit the material, coating and subsequent cleaning or painting. Steel, polymer and specially finished tools create different contact conditions. Mandrel hardness, roughness and cleanliness influence surface as much as dimensions.
Selection by function and geometry
Start with function: mass, stiffness, corrosion, conductivity, temperature, appearance, joining and life-cycle cost. Then review depth, diameter ratios, radii, openings, flanges and strain concentrations. A decorative requirement may be harder than the geometry itself. Select material together with process, pass count, finish and inspection plan.
Material comparison
| Material | Status | Process characteristics | Essential inputs |
|---|---|---|---|
| Aluminium | standard | Pure aluminium and aluminium alloys differ in ductility, strength and work-hardening response. | Work hardening develops during spinning and demanding shapes may require intermediate annealing. |
| Low-carbon and deep-drawing steels | standard | Cold-rolled sheet usually provides a more controlled surface and thickness than hot-rolled material, where scale and roughness affect friction. | Springback, hardness and work hardening affect pass planning and mandrel compensation. |
| Stainless steel | standard | Austenitic, ferritic and duplex families have different ductility, work-hardening rates and springback. | Satin finishing, polishing and passivation should be tied to the final requirement. |
| Copper | standard | Selected copper grades offer high ductility, but purity, deoxidation route and delivery condition influence actual performance. | Copper is used for conductive, decorative, thermal and architectural components. |
| Brass and bronze | mixed | Brasses differ with zinc content, phase structure and cold-working capability. | Both groups appear in decorative parts, lighting, instruments and technical products. |
| Zinc and titanium-zinc | special | Zinc and titanium-zinc sheets are sensitive to working temperature, rolling direction and radius. | Rosik qualifies zinc projects individually from manufacturer, designation, thickness, rolling direction, intended process temperature and appearance requirement. |
| Silver and precious metals | special | Silver combines exceptional conductivity with useful ductility in a suitable condition, but high material value changes trial, allowance and scrap planning. | Every precious-metal enquiry requires individual agreement on material responsibility, accounting, grade, geometry and quality. |
| Titanium | special | Titanium grades combine low density, corrosion resistance and strength, but do not share one formability profile. | Assessment requires exact grade, certificate, thickness, radii, condition, surface and batch size. |
| Nickel and nickel alloys | special | Pure nickel and nickel alloys vary in heat resistance, corrosion resistance and hardening behaviour. | Rosik reviews nickel-alloy enquiries individually. |
Data required for assessment
Complete inputs shorten the path from enquiry to a process decision and expose missing assumptions before trials.
- exact grade, standard and certificate where required
- delivery condition or temper and any prior processing
- thickness, sheet size or blank diameter, including tolerances
- 2D/3D drawing with radii, height, diameters and edge details
- rolling direction, finish, protective film and acceptable marks
- quantity, repeat demand and target delivery
- downstream welding, polishing, anodising, painting or passivation
- service temperature, corrosion, food-contact or electrical requirements
Send material data for review
A drawing, grade, temper, thickness and quantity let us separate assumptions from a defensible process assessment.
Request a technical quotation+48 608 383 024Material selection FAQ
Is a metal name enough for a quotation?
No. Grade or alloy, condition, thickness, geometry, quantity and surface requirement are the practical minimum.
Which materials are documented in Rosik’s standard offer?
Aluminium, low-carbon steel, stainless steel, copper and brass are documented; each part still needs review.
Are titanium and Inconel standard capabilities?
No. They are special or industry-context materials and require separate confirmation of process and resources.
Why does aluminium temper matter?
Temper records strain hardening and heat treatment, affecting ductility, work hardening and cracking risk.
When is intermediate annealing considered?
When accumulated hardening restricts further safe strain, subject to alloy, surface, geometry and economics.
Will protective film guarantee a flawless surface?
No. Film can help, but pressure, sliding and radius can alter or damage it.
What does rolling direction change?
Anisotropy can alter flow, ovality, springback and edge-cracking tendency around the blank.
Can a material be substituted without changing tooling?
Sometimes, but thickness, springback and friction may require mandrel, pass or quality adjustments.
Which matters more, ductility or strength?
The process needs forming reserve while the finished part must meet stiffness, durability and surface requirements.
Does this guide confirm every alloy can be spun?
No. It explains qualification; confirmation follows review of the exact material, geometry, quantity and requirements.