The quotation confirms material availability, required records and the machining route.
| Selection priority | Reference grade / condition | Useful parameter or distinction |
|---|---|---|
| Low part mass | 6061 extrusion / TIMETAL 6-4 | Density ≈2.71 / 4.42 g/cm³ Room temperature / 22°C, respectively |
| Corrosion exposure | 304 / 304L stainless steel | General indoor / mild outdoor exposure; fluid chemistry determines grade selection |
| Load and wear | 42CrMo4 +QT, Ovako 327A Round bar, 40 < diameter < 100 mm | Yield strength ≥650 MPa Hardness 270–320 HB |
| Electrical contacts | C11000 / C36000 | Conductivity 101 / 26% IACS 20°C, respectively |
| Anodized appearance | 6061 / 6063 aluminum | Hydro identifies 6063 for critical cosmetic anodizing |
References: Hydro Alloy 6061; TIMET TIMETAL 6-4; Outokumpu Core range; Ovako 42CrMo4; Copper Development Association C11000 and C36000. Density and conductivity are typical. Strength and hardness retain the stated material condition; corrosion and appearance require application-specific selection.
Flat faces, pockets, slots and hole patterns in blocks, plates and housings.
Discuss tool access, corner radii and any thin sections.
View cnc millingDiameters, bores, grooves and threads in shafts, bushings and rotational parts.
Identify fits, thread details and any off-axis features.
View cnc turningMulti-face or contoured geometry that needs additional tool orientations.
Review the model before deciding on indexed or simultaneous machining.
View 5-axis machiningPockets, mating faces and internal clearances.
Bore size, outside diameter and mating fits.
Hole patterns, datums and mounting surfaces.
Bolt circles, sealing faces and concentric features.
| Part material | Options to discuss | Confirm on the drawing |
|---|---|---|
| Aluminum parts | Anodizing, conversion coating or an agreed painted finish. | State color, cosmetic faces, masking and finished dimensions. |
| Stainless parts | Passivation, polishing or another specified treatment. | State the purpose, surface requirements and applicable specification. |
| Carbon and alloy steel | Heat treatment or a specified protective finish. | Confirm final hardness, treatment order and coating allowance. |
| Copper and brass | As-machined, polished or plated surfaces as specified. | Identify electrical contact areas and any composition restrictions. |
| Titanium and nickel alloys | A grade- and application-specific finishing plan. | Discuss the governing specification and any post-treatment inspection. |
Do not leave a critical fit to a generic finish note. Identify the surfaces that must be measured in the final supplied condition.
Agree which records are required and how the material designation and batch will be identified. A generic certificate should not be treated as evidence for a specific delivery.
Identify critical characteristics and agree the inspection method, sample size and report format before production.
A material certificate and a dimensional report answer different questions. Include any needed hardness, finish or other checks in the order requirements.
Know which factory will produce the part, who coordinates outside processes and who handles acceptance questions.
Grade, size, stock form and any specified condition affect the starting material and purchasing route. A low raw-material price does not by itself establish the lowest finished-part price.
Tool access, stock removal, setups, tight features and additional treatments affect the machining cost. Alloy and heat treatment also affect how the material cuts.
Compare the same grade, drawing revision, quantity, finish and inspection scope across quotations. State sample quantities separately from a forecast or a later repeat order.
Ask for an alternative only where the design permits it. Any change of grade, condition or acceptance requirements needs agreement before manufacture.[3]
Identify the drawing revision, metal grade, condition and quantity.
Resolve critical dimensions, finishing and required records.
Agree production responsibility, price, timing and sample approval.
Reference the approved revision and identify changes.
We machine aluminum, stainless steel, carbon and alloy steel, titanium, brass, copper, Inconel alloys and cast iron. Each material page covers its grade options, part applications and machining requirements.
Yes, you can send the material designation and applicable specification for review. Listing a metal family does not mean every grade, stock form or condition is available. We will need to confirm the actual requirement before quoting.
An exact grade supports a more definite quotation. When the choice is still open, describe the part’s function, loads, environment and required properties. Potential alternatives can be discussed, but the final choice needs engineering approval for your application.
Do not assume that two differently named grades are interchangeable. Supply the required standard, composition and properties. Any proposed substitution should be reviewed and explicitly approved before purchasing or machining the material.
A 3D model and its matching 2D drawing are a useful starting point. Include the part number, revision, units, grade, condition, tolerances, threads, surface finish, order quantity and any required records. Agree confidentiality before sharing restricted files.
No universal tolerance is promised on this page. Feature size, geometry, material condition, workholding, finishing and the inspection approach all need review. Mark the critical characteristics on the drawing rather than applying a tight tolerance to every surface.
Include the required document type, specification and traceability expectations in the inquiry. Availability and scope must be confirmed for the particular order. A material certificate does not replace dimensional inspection of the finished part.
Share both the initial quantity and your later plans. Agree the purpose of the sample, its material and finish, and the approval requirements. Keep later production quantities distinct from a non-binding forecast.
Not necessarily. Compare the full manufacturing scope, including stock, setups, machining, treatment, inspection and quantity. A material change is only useful when the alternative still meets the part’s requirements.
The appropriate manufacturing arrangement is confirmed during project review. Where a partner is needed, discuss whether VETCNC coordinates the work or introduces you directly, and agree who is responsible for production, records and communication.
Agree confidentiality and the transfer method before sharing sensitive or restricted files.
Share your drawing, material and quantity. Tell us what you need and we will reply by email.
Material references. Confirm the exact grade, condition and availability for each order.
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