A356-T6 Aluminum Castings for Pump Housings & Valve Bodies
Evaluate A356 for a housing that needs a heat-treatable alloy, machined bores or sealing faces. Bohua reviews the casting, heat-treatment, CNC and inspection scope against your drawing; the alloy name alone is not a pressure-tightness guarantee.
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 | What to verify for this application |
|---|---|
| Pump housings | Leak-test acceptance, sealing surfaces and final bore dimensions |
| Valve bodies | Port geometry, sealing-face flatness and internal-integrity requirements |
| Structural brackets | Load cases, temper and the agreed mechanical-test basis |
| Heat-treated structural housings | Required strength and elongation, sampling and heat-treatment records |
| EV drivetrain components | Minimum walls, bearing seats and assembly interfaces |
| Powertrain mounts | Load validation and the machined datum scheme |
| Pressure-sensitive fluid-path castings | Casting route, porosity acceptance and final leak-test stage |
Process fit
- • Gravity casting: review reusable tooling, feeding, section geometry and the required temper
- • Low-pressure casting: compare controlled filling and feeding against the geometry and internal-integrity requirements
- • 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)
Project Requirements
Choose the review your component needs
Select a pump housing, valve body or supplier-document review below. Each checklist identifies the drawing, machining and inspection details needed for a comparable quotation.
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.
Need the valve-body route?
If the A356 question is really about ports, bores, threads, sealing lands, or pressure-test records, move to the valve body application page before comparing suppliers. That page carries the machining and approval inputs buyers usually leave out of an alloy-only RFQ.
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.
A356 valve body application bridge
Use when ports, bores, threads, sealing faces, and pressure assumptions are what actually decide whether the supplier quote is comparable.
Open buyer path →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?
Bohua has its own pressure-tightness testing workshop. Test method, medium, pressure, duration and acceptance criteria are defined according to customer drawings and project requirements.
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, project-defined pressure-tightness testing, 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 pressure-test criteria, 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.
How to verify A356-T6 properties
Specify the alloy, temper, casting route and specimen basis together. A generic property value is not a measured result for your part. The A356 properties and testing guide explains the standard and sampling decisions.
| Requirement | Agree before production | Evidence to request |
|---|---|---|
| Tensile strength and elongation | Specification, limits and coupon or casting specimen | Lot-linked tensile report with specimen identification |
| Heat-treatment condition | Approved temper, process and lot definition | Heat-treatment batch record |
| Hardness | Method, location and acceptance range | Drawing-linked hardness record |
| Pressure tightness | Method, pressure, leak limit and test stage | Part or lot test record under the agreed plan |
| Finished dimensions | Critical features, datums and delivery condition | Dimensional or CMM report against the drawing |
Alloy chemistry and specification
A356 belongs to the aluminum-silicon-magnesium casting family. Match the full alloy designation and chemical limits to the controlling specification and material certificate, including impurity limits. For permanent-mold castings, review the scope of ASTM B108/B108M. Do not assume an EN or GB alloy is interchangeable without a documented comparison.
For a component-specific example, the A356-T6 fire water pump housing checklist separates casting supply from complete-pump approval. It is a planning guide, not a published performance test.
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.
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