A356 Aluminum Pump Housing Casting Material
A356 and A356-T6 are common RFQ choices for pump housings, valve bodies, and pressure-conscious aluminum castings that need heat-treatment planning, CNC datums, leak-test criteria, and inspection records.
When is A356 a fit?
A356 is a common Al-Si-Mg alloy for structural and pressure-sensitive aluminum casting RFQs. It is often reviewed when the program needs heat-treatable performance, ductility, machinability, and a defined inspection plan. Whether it is the right route depends on drawing geometry, wall thickness, pressure or leak risk, heat-treatment expectations, and customer approval requirements.
For A356 aluminum pump housings, the fastest RFQ path is to send PDF + STEP drawings with leak-test method, pressure or acceptance criteria, sealing-face notes, CNC datum scheme, T6 requirement, annual volume, and inspection records needed for supplier approval.
Common use cases
| Use case | Why A356 fits |
|---|---|
| Pump housings | Pressure-tight, machinable sealing surfaces, T6-stable bores |
| Valve bodies | Sealing-face flatness, fluid-path porosity control |
| Structural brackets | Strength/weight ratio, T6 fatigue performance |
| Heat-treated structural housings | T6 response gives elongation + UTS for crash/load cases |
| EV drivetrain components | Wall-thickness flexibility, machined bearing seats |
| Powertrain mounts | Vibration tolerance + machined datums |
| Pressure-sensitive fluid-path castings | Low porosity from gravity / low-pressure routes |
Process fit
- • Gravity casting: most common A356 route; suitable for thicker sections, T6-friendly solidification
- • Low-pressure casting: tighter porosity control for pressure-sensitive parts
- • T6 heat treatment: heat-treatment route, furnace lot control, and acceptance records confirmed by drawing and customer requirement
- • CNC machining: bores, sealing faces, port threads, and bearing datums machined to drawing
- • Leak test / X-ray: applicable on pressure-tight A356 castings per program requirements
RFQ checklist for A356
- 1.2D drawing + 3D file (PDF + STEP preferred)
- 2.Target temper (as-cast / T5 / T6) and rationale
- 3.Pressure / leak-test standard if part is fluid-path
- 4.Machining datum scheme + critical bores / sealing faces
- 5.Annual volume + MOQ assumptions
- 6.Inspection standard (CMM, X-ray scope, PPAP level)
- 7.Surface finish or coating requirements
- 8.Tooling status (new / transfer / quoted from existing program)
A356 RFQ route matrix
Route material intent to the right quote path
A356 searches can mean a pump housing, a valve body, a supplier comparison, or a documentation approval question. Pick the route below so the RFQ carries the alloy, machining, inspection, and approval assumptions that change the real quote.
A356-T6 pressure-tight pump housing
Use when leak-test criteria, sealing faces, CNC datums, T6 route, CMM records, or PPAP/FAI make the alloy decision quote-critical.
A356 / ZL114 valve body
Use when ports, bores, threads, sealing lands, pressure assumptions, and machining sequence decide whether A356 or an adjacent route fits.
A356 supplier comparison
Use when sourcing compares China suppliers and the buyer needs a fair comparison by process route, tooling status, machining scope, and inspection evidence.
A356 quality documentation before approval
Use when supplier approval depends on material certificates, heat-treatment records, CMM, leak-test or X-ray scope, PPAP, FAI, and traceability.
A356 product RFQ examples
Use these product pages to see how Bohua turns A356 material selection into a product-level RFQ package with drawing, annual volume, machining, inspection, and follow-up fields.
A356-T6 pump housing RFQ example
Pressure-sensitive A356 gravity casting page for buyers specifying leak test, CMM, CNC datums, and documentation.
View product RFQ package →A356-T6 truck intake manifold RFQ example
Automotive manifold page for OEM buyers reviewing flow-path geometry, flange flatness, and machining stock.
View product RFQ package →A356-T6 gearbox housing RFQ example
Industrial reducer housing page for buyers comparing A356-T6 casting, tooling, machining, and export supply control.
View product RFQ package →A356-T6 hydraulic valve body RFQ example
Fluid-control casting page for buyers defining sealing faces, ports, bores, and inspection requirements.
View product RFQ package →A356 buyer path to RFQ
If A356 is being considered for a pump housing, valve body, bracket, or pressure-sensitive casting, these pages help buyers move from alloy selection to a quote-ready package.
Pressure-tight A356 pump housing RFQ
Use when the drawing includes leak test, sealing faces, machined bores, or pressure-path quality risk.
Open buyer path →Pump housing supplier route
Use when the buyer is comparing China suppliers for pump bodies, pump casings, machining, inspection, and export delivery.
Open buyer path →A356 / ZL114 valve body RFQ
Use when ports, threads, sealing faces, pressure assumptions, machining sequence, and inspection records drive the quote.
Open buyer path →A356 supplier approval documentation
Use when the RFQ needs CMM records, material certificates, heat-treatment records, leak-test records, PPAP, FAI, or traceability.
Open buyer path →A356 supplier comparison route
Use when the buyer is comparing China casting suppliers by alloy route, process fit, CNC scope, inspection evidence, and export assumptions.
Open buyer path →Pump housing second-source qualification example
Use when A356 pump housing buyers need public evidence for DFM review, inspection records, pilot validation, and supplier qualification logic.
Open buyer path →Procurement FAQ
Is A356 the same as ZL114?
A356 (ASTM) and ZL114 (Chinese GB standard) are often treated as adjacent Al-Si-Mg casting alloy routes for early RFQ discussion. Buyers should still confirm the exact standard, trace-element limits, heat-treatment condition, and test protocol required by the drawing or customer specification.
When should I choose A356 vs ADC12?
Review A356 when the part may require heat-treatable performance, thicker wall sections, machining stability, or pressure/leak-test planning. Review ADC12 when high-pressure die casting, thin-wall geometry, and high-volume cycle time are more important. The right choice still depends on drawing geometry, annual volume, inspection risk, and approval requirements.
Does Bohua heat-treat A356 in-house?
Bohua can review A356 heat-treatment requirements together with the casting and machining scope. The final T5 or T6 route, furnace lot control, quench assumptions, aging parameters, and records should be defined by the drawing, customer specification, and approval plan.
What inspection records can be supplied for A356 castings?
Typical records under an IATF 16949 quality-system workflow can include material certificate, dimensional inspection report, hardness record, heat-treatment batch record, and final inspection record. X-ray reports, PPAP documentation, and customer-specific inspection records should be defined by the RFQ and program requirements.
How is A356 leak performance verified?
Air-pressure decay testing is commonly reviewed for fluid-path castings, while helium leak testing may be considered for more demanding leak specifications. Test medium, pressure, duration, sampling plan, pass/fail criteria, and whether records belong in PPAP or FAI should be defined by the customer drawing or referenced standard.
What should buyers check before selecting A356 for pump housings?
Confirm wall thickness, pressure or leak-test criteria, sealing faces, machining datums, T6 heat-treatment need, inspection scope, and annual volume. These details decide whether A356 gravity casting, low-pressure casting, or another route is the right RFQ path.
Can A356-T6 machining and inspection be reviewed in one RFQ?
Yes. Bohua can review A356-T6 casting, heat treatment, CNC machining, leak test, CMM inspection, material certification, and export packing together when buyers send the drawing package, annual demand, and acceptance criteria.
How should buyers route an A356 material question into the right RFQ?
Use the pressure-tight pump housing RFQ when leak-test, sealing faces, or CNC datums drive the project. Use the valve body RFQ when ports, bores, and threads drive machining risk. Use supplier comparison or quality-documentation RFQ when approval evidence, PPAP, FAI, CMM, heat-treatment records, or traceability decide supplier fit.
Mechanical Properties
| Property | As Cast (F) | T5 | T6 (Typical) |
|---|---|---|---|
| UTS (MPa) | reference range | reference range | project-specific target |
| Yield Strength (MPa) | reference range | reference range | project-specific target |
| Elongation (%) | reference range | reference range | project-specific target |
| Hardness (HB) | reference range | reference range | project-specific target |
| Fatigue Strength (MPa) | application-dependent | application-dependent | application-dependent |
Chemical Composition (wt%)
| Si | Mg | Fe | Cu | Mn | Ti | Al |
|---|---|---|---|---|---|---|
| 6.5–7.5 | 0.20–0.45 | ≤ 0.20 | ≤ 0.10 | ≤ 0.10 | 0.10–0.20 | Balance |
Why Engineers Choose A356
Heat Treatable to T6
T6 planning can be reviewed when drawings define mechanical-property targets, heat-treatment records, and approval requirements.
Porosity Risk Planning
Gravity or low-pressure casting can support lower gas-entrapment risk when gating, risering, melt control, and inspection criteria are planned together.
Corrosion Review
A356 is often considered where corrosion exposure matters, but coating or surface-protection needs should follow the service environment.
Repair or Assembly Review
Weldability, repair, or assembly assumptions should be confirmed against the alloy condition, casting quality, and customer specification.
Standards-Based RFQ
A356 programs should reference the required ASTM, EN, ISO, GB, or customer standard and the records needed for supplier approval.
Structural RFQ Fit
Use A356 discussion for brackets, housings, and structural components where the drawing requires heat-treatable aluminum performance.
Quick Reference
Typical Applications
- Automotive suspension parts
- Intake manifolds
- Transmission housings
- Structural brackets
- Pump bodies
- Industrial equipment frames
- Railway components
Related Resources
- A356 Aluminum Casting ManufacturerMove from alloy selection to an RFQ-ready supplier page.
- Aluminum Gravity Casting Process GuideSee why A356 is the default alloy for permanent mold casting.
- T6 Heat Treatment for Aluminum CastingsUnderstand how A356-T6 reaches structural-grade properties.
- A356 vs ADC12 Alloy ComparisonCompare A356 with common die casting alloy routes before locking your spec.
Need A356 Parts?
Send us your drawing or describe your requirement so alloy, heat-treatment, and inspection needs can be reviewed.
Request a Quote