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ZAODA Industrial Manufacturing Group
Corrosion resistance

Stainless Steel CNC Machining

CNC machining of 303, 304, 316 and 17-4PH stainless steel, with grade, condition, corrosion exposure and finish defined for the component.

Review My Stainless Steel Requirements →Compare Selection Factors
Toshiba CNC machine
Stainless grade & surface condition

Select the Grade with the Service Environment

Corrosion exposure, material condition, machining and final surface requirements belong in the same review. The stainless family name alone does not define the delivered part.

Select the Grade with the Service Environment
Material referenceSelection focusDefine before release
303Review machinability alongside acceptable composition, corrosion exposure and any restricted-substance requirements.Exact specification and condition, service environment and accepted material composition.
304 & 316Review the specified austenitic grade against corrosion, temperature, assembly and surface requirements.Grade, stock condition, finish, joining environment and required material records.
17-4PHTreat the heat-treatment condition as part of the material selection and manufacturing plan.Grade and condition, required properties, processing sequence and acceptance documentation.
From material to finished part

Define the Surface as Carefully as the Grade

Exposure & assembly
Describe the media, temperature and mating or welded assembly so the specified grade can be reviewed in context.
Passivation & texture
Identify passivation requirements, surface texture and the surfaces that must retain their fit after processing.
Cleanliness & records
Specify any free-iron or cleanliness checks, acceptance criteria and material documentation required for the project.
Material definition

Stainless Steel Selection Notes

Selection context

Stainless steel may be selected for corrosion resistance, strength, temperature performance or appearance. Required cleanliness is defined through processing and inspection. The grade and condition influence cutting forces, work hardening, distortion, finish response, and corrosion performance.

Common options

303 may be chosen for machinability where its composition and corrosion performance are acceptable. 304 and 316 are widely specified austenitic grades; 17-4PH offers a precipitation-hardening route with properties tied to heat-treatment condition.

RFQ Requirements

Confirm the governing material standard, condition, passivation requirement, surface texture, weld or assembly environment, restricted substances, certificates, and whether free-iron or cleanliness testing is required.

Common grades
303 · 304 · 316 · 17-4PH
Must specify
Grade + condition + governing standard
Review focus
Corrosion · Work hardening · Passivation · Finish

Process planning notes & reference images

  1. Define functional requirements

    Define service conditions, loads, assembly interfaces, quantities, material condition and required inspection records.

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  2. Select the manufacturing process

    Compare material grade, stock form, machining access, secondary operations, finishing and dimensional stability.

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  3. Verify specified requirements

    Verify material documentation and specified part characteristics using agreed inspection methods, sampling and reporting.

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Common questions

Material Selection Questions

What should I define beyond “stainless steel”?

Specify the grade, condition, governing standard, corrosion environment, passivation, surface texture, certificate needs, and any cleanliness or free-iron test.

Who approves the final material specification?

The customer approves the grade, material condition, governing specification, required material records and permitted substitutions before production release.

Can finishing change the material decision?

Yes. Review coating compatibility, appearance, thickness, masking, heat exposure and electrical or corrosion requirements alongside the base material.

Continue your review

Related Processes & Engineering Guides

Connect the material to the process

Compare other material references

Aluminum →Steel →Titanium →Copper Alloys →Engineering Plastics →Die Casting Alloys →
Quality & inspection → Surface finishing → Drawing & design guides →

Review Stainless Steel for Your Part

Include the grade and condition, exposure environment, surface requirements and any cleanliness or material records.

Review My Stainless Steel Requirements →

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