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Materials

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Specify more than an alloy name

Grade, condition and application belong in the same material discussion.

Specify more than an alloy name

IN THIS ARTICLE

Working on a similar requirement?

Bring the drawing and open questions into the discussion.

Begin with the application

Material selection starts with the conditions around the component. Consider its load, temperature, exposure and contact with other parts. Record the requirements that are fixed by the application before discussing alternatives.

If your drawing already specifies a material, provide the exact designation. If selection is open, describe the function rather than choosing a grade only by appearance.

Include the condition, not only the grade

The required condition belongs beside the material designation. Include temper, heat treatment, hardness or polymer filler information where it is part of the specification.

Where a customer or project specification governs the material, include that reference and the applicable revision with the enquiry.

Connect material, finish and records

Finishing and documentation requirements should travel with the material specification. Define protected areas, appearance requirements and any material records needed for acceptance.

Requesting traceability also requires defining what needs to be identified and documented. State the required document type and scope before quotation.

PUT IT INTO PRACTICE

Keep the requirement with the drawing.

Include the current revision, material, quantity and any inspection or finishing requirements when you send your project.

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Related notes.

What to include in a CNC machining enquiry

Drawings

What to include in a CNC machining enquiry

Bring the model, drawing revision and order requirements into one clear package.

Read article ↗

Which surfaces need special attention?

Finishing

Which surfaces need special attention?

Visible faces, contact areas and mating features may need different requirements.

Read article ↗

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