Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR CASTING ROUTE + YOUR DELIVERY CONDITION
A356 Aluminum and A356-T6 Custom Castings
Choose the casting route, heat-treatment condition and finished interfaces together. Your A356 aluminum casting services review starts with the shape your assembly needs and the evidence it must meet.
For custom A356 aluminum castings, define the alloy, process options and final supplied condition before tooling is committed.
DO NOT LOSE THE TEMPER IN PROCUREMENT
A356 Is the Alloy. T6 Is the Specified Condition.
A356 is an aluminum-silicon-magnesium casting alloy. A356 aluminium is an alternate spelling. The A356-T6 designation includes a heat-treated delivery condition; it does not identify a different alloy.
For A356 T6 castings, preserve the required material condition through machining, testing and release. When selecting an A356 T6 casting supplier, agree the governing specification and report scope alongside the geometry.
Your alloy
Full material callout and permitted substitutions.
Your condition
Specified temper, route and processing sequence.
Your acceptance
Part or specimen tests and traceable release records.
3 Casting Routes to Review for Your Geometry
When choosing an A356 casting manufacturer or A356 casting supplier, ask how the proposed route controls your cavities, surfaces and final requirements.
A356 Sand Casting
Discuss pattern/core construction, geometry changes and cast-to-machined allowance. Sand casting →
A356 Gravity Casting
Review reusable mold investment, die opening and feeding alongside the expected release quantities. Gravity die casting →
A356 Low Pressure Casting
Evaluate the proposed filling and feeding method for your component. Route availability, validation and acceptance need project confirmation.
When comparing an A356 aluminum foundry, use the same product specification and finished-part scope. No single casting method is best for every design.
A356 Aluminum Composition: Selected Limits
This A356 aluminum composition table shows selected supplier limits for A356.0. It is a purchase-review aid, not a full specification or an analysis of a delivered lot.
State the required chemistry record and its linkage to your casting. Minimums, residual elements and any additional contract limits still require the governing specification.
Foundry composition reference →| Element | Selected limits · wt% |
|---|---|
| Silicon · Si | 6.5–7.5 |
| Iron · Fe | ≤0.20 |
| Copper · Cu | ≤0.20 |
| Manganese · Mn | ≤0.10 |
| Magnesium · Mg | ≤0.45 · maximum shown only |
| Zinc · Zn | ≤0.10 |
| Titanium · Ti | ≤0.20 |
| Other elements · total | ≤0.15 |
A356 T6 Properties: Compare the Same Conditions
Use A356 aluminum properties with the casting method, temper, specimen and test basis. A data-sheet value cannot describe every section of your actual component.
| Reference | Published typical value |
|---|---|
| A356 T6 aluminum · ultimate tensile | 300 MPa |
| A356 T6 aluminum · yield | 240 MPa |
| Elongation | 7% |
| Casting route in source | Semi-permanent mold |
Values above are from the A356-T6 comparison row in Alcoa’s EverCast technical sheet. The other alloy’s chemistry and physical-property tables do not describe A356.
A356-T6 · SEMI-PERMANENT MOLD
Typical Strength Reference · MPa
Plan Your A356 T6 Heat Treatment Before Final Machining
A356 T6 heat treatment includes solution heat treatment and artificial aging. The applicable specification controls the detailed cycle, quench, handling and verification.
Before heat treatment
Agree casting condition, support, identification and any trial measurement.
After heat treatment
Review dimensional change and the allowance needed to finish critical features.
Before release
Retain the specified condition, test basis and required records.
For A356 T6 vs T5, review the complete temper definitions and property requirements. A T5 route is not an automatic substitute for a T6 drawing callout.
A356 vs 356 and 6061: Choose the Finished Part
| Comparison | Your selection question |
|---|---|
| A356 vs 356 | Do the complete chemistry limits, required temper and acceptance basis match the drawing? Similar alloy names do not approve a substitution. |
| A356 vs 6061 | Does your geometry benefit from a cast near-net shape or a wrought-stock machining route? Compare the finished geometry, volumes, material condition and verification. |
| A356 T6 vs T5 | Does the proposed heat-treatment route deliver the condition specified for your part? Agree changes before processing. |
The A356 alloy name alone is not a universal strength ranking. Select the actual component route and condition.
Review 6061 machining stock → · Review A380 die casting →
CAST · HEAT TREAT · MACHINE · VERIFY
A356 CNC Machining Around Your Final Datums
A356 machining services should connect the casting and heat-treatment sequence to the final drawing. For A356 T6 machining, identify the condition of incoming stock and the required final inspection state.
Locate
Use stable references and support the actual casting.
Finish
Retain allowance for bores, sealing faces and critical relationships.
Inspect
Measure specified datums after unclamping and the relevant finishing operations.
4 Drawing Checks That Prevent Scope Gaps
Feed the casting
Review local section changes and feeding-sensitive geometry with the proposed route.
Define interfaces
Separate cast dimensions, machined dimensions and coated dimensions.
State defect acceptance
Specify location, test method and limits where internal quality matters.
Control repair rules
Agree whether repair is permitted, what requires approval and what records are needed.
YOUR ENVIRONMENT + YOUR APPEARANCE
A356 Anodizing and Powder Coating: Approve a Sample
For A356 anodizing, judge the actual cast surface and the appearance you can accept. Silicon-rich casting surfaces should not inherit a decorative finish expectation from wrought-aluminum examples.
For A356 powder coating, agree pretreatment, color, gloss, masking and a representative casting sample. Keep coating allowance away from unapproved interference fits.
Visible surfaces
Define show faces, sample acceptance and handling protection.
Functional surfaces
Mark sealing faces, bores, threads and electrical contacts that need masking.
Match Your Application to Its Approval Requirements
A356 Pump Housing
State pressure, medium, sealing faces and any agreed leak-test condition.
A356 Automotive Castings
Identify program-specific documentation, traceability and validation.
A356 Aerospace Castings
Ask about project eligibility and the required qualification route before sourcing. A material page does not establish aerospace approval.
These are application review scenarios, not customer case studies or evidence of a tested finished assembly.
Keep the Product Standard with the Casting Route
A356 aluminum ASTM B26
Review the full B26/B26M sand-casting callout, edition, alloy, temper and testing requirements.
A356 aluminum ASTM B108
Review the full B108/B108M permanent-mold callout, edition and required supplied condition.
The standards have different product scopes. General-purpose listings alone do not address every highly loaded or safety-critical application. Full standard text is not reproduced here.
ASTM nonferrous casting standards →4 Records for Your A356 Receiving Check
Material identity
Chemistry record, alloy specification and lot linkage as agreed.
Delivery condition
Specified temper and required heat-treatment documentation.
Finished geometry
Critical dimensions and drawing revision in the supplied condition.
Special verification
Any specified NDT, pressure, mechanical or repair-approval records.
Agree methods, locations and acceptance requirements before quotation; confirm which reports are available for your project.
Quality documentation →
5 Inputs That Shape Your A356 Casting Quote
Pattern or mold
Process route, core construction, trials and ownership.
Casting geometry
Envelope, local sections, cavities and finishing access.
Condition
Required temper, heat treatment and any validation.
Finished scope
Machining, surface preparation, masks and protective finish.
Demand and evidence
Trial quantities, repeat releases, reports and packing.
Your A356 aluminum casting quote should compare the same finished part and acceptance scope, rather than an alloy price alone.
Send These 6 Inputs
01 CAD and controlled drawing
02 A356 and required temper
03 Permitted casting routes
04 Trial and repeat quantities
05 Critical features and finish
06 Tests, records and repair rules
Your A356 and T6 Questions
What is A356 aluminum?
A356 is an aluminum-silicon-magnesium casting alloy. Choose the route, specified condition and acceptance requirements with the part geometry.
What does T6 mean in A356?
T6 identifies a solution-heat-treated and artificially aged condition. The applicable specification governs the process details and required evidence.
Can A356 aluminum be welded?
Welding or weld repair needs an approved procedure, filler selection and acceptance rules. Consider heat effects, required final temper and any additional testing before approval.
Can A356 aluminum be anodized?
A suitable process may be reviewed, but casting appearance can differ from wrought aluminum. Approve a representative sample against the actual visual and functional requirement.
How much does A356 casting cost?
Tooling, geometry, route, quantities, heat treatment, machining, finish and verification determine the supplied-part quotation.
Do typical A356-T6 numbers guarantee my casting?
No. A published value depends on casting route, condition and test basis. Specify the actual acceptance criteria and request the agreed report for your order.
Is A356 the same as 356 or 6061?
No direct interchangeability follows from similar applications or cross-reference names. Review the full alloy specification, product form, condition and design approval.
Can you supply a universal heat-treatment cycle?
A single temperature/time schedule is not appropriate for every drawing, process and specification. Agree the approved process and verification for the actual casting.
