Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR LOADS. YOUR ENVIRONMENT. YOUR MATERIAL RECORD.
Material Selection Choose Around the Requirements Your Part Must Meet
For material selection for custom machined parts, compare function, grade, condition, process and required evidence together. A familiar material name does not define your finished part.
Separate Your Must-Have Requirements from Preferences
Function & loading
Identify stiffness, load paths, wear, contact and the critical dimensions that support your application.
Environment & temperature
State chemicals, moisture, temperature range and contact with other materials. Review the complete exposure.
Weight & commercial scope
Material selection: strength, weight and cost must be reviewed with geometry, stock availability, manufacturing route and inspection. A raw material price is not your finished-part quote.
Bring Temperature into Your Fit Discussion
Illustrative free expansion from 20 to 60°C
Assume an unrestrained 100 mm length and constant published mean coefficients. ΔL = α × 100 mm × 40 K. Zero baseline 0–0.10 mm.
6061 reference: 13.1 × 10⁻⁶/°F × 1.8 = 23.58 × 10⁻⁶/K. Annealed 316L sheet reference: 16.0 × 10⁻⁶/K. Both published mean ranges are 20–100°C. This assumed 20–60°C example uses those means as constants.
Material properties can change the questions you ask about a mating fit. This free-expansion example does not predict assembly clearance, stress, temperature distribution or an allowable service condition.
Primary references: Hydro 6061 data → · Uginox 316L data →. Published reference properties are not batch test results or a guarantee for a different product form. The photograph has no assigned dimensions.
Connect Your Grade Name to the Purchasing Specification
European names help identify a material family or grade. They do not authorize substitution between standards, product forms or conditions.
Specify the full standard, grade, temper or condition, product form and required certificate. Keep composition limits, typical values and actual batch results distinct.
| Grade | European reference | Selected chemistry | Basis to review |
|---|---|---|---|
| 6061 | EN AW-6061 · AlMg1SiCu | Si 0.40–0.80; Mg 0.80–1.20; Cu 0.15–0.40 wt.% | Selected composition ranges from Hydro; confirm full specification and temper. |
| 316L | 1.4404 · X2CrNiMo17-12-2 | C 0.025; Cr 16.80; Ni 10.10; Mo 2.10 wt.% | Typical composition of the referenced Uginox grade, not universal purchasing limits. |
Selected elements only; omitted elements are not zero. The order specification and material certificate govern. Sources: Hydro composition limits → · Uginox typical composition →.
Material Substitution Approval for Your Manufacturing Order
01 · Identify the difference
Compare standards, grade, condition, product form and any required records.
02 · Review the consequences
Assess function, joining, finish, corrosion, thermal behavior and inspection requirements.
03 · Record the decision
Obtain required engineering and purchasing approval before changing the controlled order baseline.
The brackets are different illustrative concepts, not an approved material substitution or an equal-strength comparison.
Choose Your Material with the Process Route
Machining
Review stock form, tool access, condition and the features that control final fit.
Forming & casting
Review how geometry and process affect the available alloy, condition and required secondary operations.
Joining & finishing
Review the resulting condition, contact materials, coating compatibility and acceptance evidence. A starting-stock certificate does not describe every later operation.
Review material and process support → · Review surface finish selection →
6 Inputs for Your Material Review
- Controlled drawing and intended part function.
- Material standard, grade, condition and stock form.
- Operating temperature, chemicals and contact materials.
- Critical dimensions, finish and joining requirements.
- Sample quantity, repeat demand and availability constraints.
- Required certificates, tests and substitution approval owner.
Answers Before You Approve the Grade
What material information is needed for a manufacturing quote?
Send the full grade and standard, condition, product form, finish, critical requirements, quantity and required certificates. Identify any permitted alternatives and approval responsibility.
Can a European grade name approve a substitute automatically?
No. Compare the complete purchasing standards, product form, condition and acceptance requirements and obtain the required approval.
Does a typical data-sheet value establish my batch result?
No. Typical reference data support discussion. Required material certificates and tests must be defined for the supplied product and order.
Does the expansion example establish a safe operating temperature?
No. It is a simplified free-expansion calculation. Your assembly loads, temperature distribution, restraints and service requirements need their own engineering review.
Explore material families → · Connect material to design → · Prepare your quote baseline →
