Specifications and supply terms
Material grades, standards, tolerances, finishes, minimum order, tooling, packaging, lead time and payment terms — stated up front so you can compare us against your current supplier without a phone call.
Silica-sol investment casting and CNC machining in 300/400-series stainless, low-alloy and high-temperature alloy · casting tolerance ±0.1 mm by process · MOQ 500 pcs · sampling 10 days · production lead time 25 days at MOQ · tooling owned by you · EXW or FOB.
Order & supply parameters
These are the terms we confirm in writing with your quotation. Where a figure depends on the part, it is quoted against your drawing rather than assumed.
| Parameter | What we offer |
|---|---|
| Materials | Stainless steel 300 series (304, 316, 316L, 310, 309) and 400 series (409, 410, 420, 430, 436), low-alloy steel and high-temperature alloy. Other grades on request. |
| Material standards | Produced and certified to the standard and grade you state on the drawing or PO. Tell us the standard and we quote to it. |
| Casting tolerance | ±0.1 mm by process, confirmed against your drawing before tooling starts. |
| Machining tolerance | Confirmed against your drawing before tooling starts. Send the drawing and we return the achievable figures with the quotation. |
| Surface treatment | Shot blasting, coating and galvanising, applied to the specification on your drawing. |
| Minimum order quantity | 500 pcs per part number for series production. Smaller volumes are quoted as tooling trials. |
| Tooling | Wax dies and fixtures quoted separately. Tooling remains your property and can be transferred or released to you on request. |
| Sampling | Sample castings submitted for dimensional and visual approval before series production. Sample cost is confirmed in the quotation. |
| Production lead time | 25 days at MOQ 500 pcs, counted from sample approval and receipt of deposit. Complex or high-volume parts are quoted with their own schedule. |
| Packaging | Export cartons on pallets as standard. Optional VCI film, desiccant, foam separation, custom carton printing and your own part labels. |
| Incoterms | EXW or FOB. Other terms by agreement. |
| Payment terms | T/T. The deposit and balance ratio is agreed in the quotation and reviewed after the first orders. |
| Shipping | Sea freight (FCL / LCL), air freight and express. Shipping marks to your specification. |
| Documentation | Commercial invoice, packing list, bill of lading, certificate of origin, material certificates, inspection reports, and any certificate your market requires. |
Material grades
Drawing in EN or DIN but ordering from Asia? This table maps the grades you are likely to specify. If your grade is not listed, send it — we will confirm availability and any minimum melt quantity.
| Grade (ASTM / AISI) | EN / DIN equivalent | JIS | Typical application |
|---|---|---|---|
| 304 / S30400 | 1.4301 (X5CrNi18-10) | SUS304 | General corrosion resistance |
| 316 / S31600 | 1.4401 (X5CrNiMo17-12-2) | SUS316 | Marine hardware, chemical service |
| 316L / S31603 | 1.4404 (X2CrNiMo17-12-2) | SUS316L | Food, pharmaceutical and welded assemblies |
| 310 / S31000 | 1.4841 (X15CrNiSi25-20) | SUH310 | High-temperature parts |
| 309 / S30900 | 1.4828 (X15CrNiSi20-12) | SUH309 | Heat-resistant parts |
| 409 / S40900 | 1.4512 (X2CrTi12) | SUH409 | General corrosion resistance |
| 410 / S41000 | 1.4006 (X12Cr13) | SUS410 | Wear parts, hardenable |
| 420 / S42000 | 1.4021 (X20Cr13) | SUS420J1 | Hardened wear parts |
| 430 / S43000 | 1.4016 (X6Cr17) | SUS430 | General corrosion resistance, decorative |
| 436 / S43600 | 1.4513 (X6CrMoTi17-1) | SUS436L | Improved corrosion resistance |
| Low-alloy steel and high-temperature alloy are quoted to the grade stated on your drawing. Other grades on request. | |||
Equivalences are indicative. Final acceptance is against the standard and grade stated on your drawing or purchase order, and the composition is verified by spectrometry on every melt.
Material selection
Grade names only tell you half the story. What usually decides the specification is the environment, the working temperature and the strength the part has to carry. This is the comparison we walk through with customers before a grade is fixed.
| Grade group | Corrosion resistance | Heat resistance | Mechanical properties | Specify it when |
|---|---|---|---|---|
| 300 series (304, 316, 316L) | Good to very good — 316/316L add molybdenum for chlorides and marine splash | Oxidation limit around 800 °C | Quoted to grade and heat treatment | Valve and pump bodies, fittings, marine and building hardware, food and pharmaceutical equipment |
| 400 series (409, 410, 420, 430, 436) | Moderate to good — better than carbon steel; 410 and 420 are hardenable | Service temperature quoted to grade | Quoted to grade and heat treatment | Wear parts and components where hardness or cost-effective corrosion resistance matters |
| Low-alloy steel | Poor to moderate — coating or galvanising advised | Service temperature quoted to grade | Quoted to grade and heat treatment | Structural and load-bearing parts with no direct corrosion exposure |
| High-temperature alloy (309, 310) | Excellent high-temperature oxidation resistance | For high-temperature service | Quoted to grade and heat treatment | Heat-resistant fittings, unions and furnace-side components |
Service temperature limits are indicative for continuous operation and vary with load, atmosphere and section thickness. Confirm the final grade against the applicable standard and your own design calculations. Where a grade is borderline, we will say so and suggest an alternative rather than quoting whatever was asked for.
Market access & compliance
This is where suppliers and buyers most often talk past each other. A foundry does not “have CE” — conformity is declared for a finished assembly. What we can do is supply the material and test documentation that your technical file needs.
| Destination market | What typically applies | Who declares conformity | What we provide |
|---|---|---|---|
| European Union | PED 2014/68/EU for pressure equipment above the defined thresholds; REACH and RoHS substance obligations on the finished product | The equipment manufacturer placing the assembly on the market, with a notified body where the category requires it | Material certificates traceable to the heat poured, dimensional and NDT reports, and material declarations to support your technical file |
| Germany (specific) | AD 2000-Merkblatt W0 is commonly specified for pressure-retaining materials | You or your notified body | Heat-specific testing and third-party witness arranged to the standard your notified body specifies |
| United Kingdom | UKCA marking mirrors CE for pressure equipment placed on the GB market | The manufacturer placing the assembly on the GB market | Same documentation route as the EU, addressed to the applicable BS EN standards |
| United States | ASTM and ASME material specifications; ASME BPVC Section II where the part is pressure-retaining. CE marking does not apply | You, or the authorised inspector for stamped equipment | Material certificates to the grade stated on your drawing, plus third-party test reports arranged on request |
| Australia / New Zealand | AS/NZS standards where specified; no CE or UKCA obligation for industrial castings | You | Material certificates and inspection reports to the AS/NZS grade stated on your drawing |
| Any market | The documentation set is agreed at order stage | Independent inspection is arranged through the inspector you nominate | Material certificates traceable to the heat poured, plus dimensional and NDT reports where the drawing requires them |
Issued against the heat number actually poured — not a generic declaration for the grade.
REACH and RoHS declarations, plus conflict-minerals statements where your compliance process requires them.
Witnessed testing and independent inspection arranged around your nominated body, scheduled with the production run rather than after it.
Compliance responsibility for the finished assembly always rests with the party placing it on the market. If a requirement is unclear, tell us the market and end use and we will confirm in writing what we can and cannot supply.
How we work with you
The commercial questions buyers ask before committing — answered here rather than left to a phone call. Anything that turns out to be different in practice, we will tell you before you order, not after.
OEM
You supply the 2D drawing and 3D model; we supply tooling, castings, machining, heat treatment, finishing and inspection. Any dimension we cannot hold is raised as a written query before tooling starts, so a rejection does not appear at first article.
ODM
Send a sample part, a worn original, or just a functional requirement. We measure it, propose a castable and machinable design, state the effect on cost and weight, and build a prototype for your testing. You own the resulting design and tooling.
We can issue a short supply agreement covering tooling ownership, confidentiality, sample approval and handover obligations — before you commit to the first order.
Part families
Not a catalogue — we are an OEM supplier and do not hold stock. These are the categories you can expect us to quote confidently against a drawing.
Bodies, bonnets, discs, seats, impellers, wear rings, trims.
Turned and ground components with concentricity-critical features.
Structural parts requiring strength with minimal post-machining.
Teeth, inserts, plates and liners in hardened grades.
Automotive and machinery linkage parts with machined bores.
Cleats, fittings and anchors in 316 and 316L stainless.
Enclosures, gearbox covers, end caps and bearing housings.
Easily cleaned components for food, dairy and pharmaceutical lines.
Lead time
Vague lead times cause problems later. This is the stage-by-stage breakdown for a typical new part, quoted from the day your order and any tooling payment are received.
Once tooling and the inspection programme exist, repeat orders skip tooling and sampling entirely and go straight into the 25-day production window.
| Stage | Duration |
|---|---|
| Sample casting & first article inspection | 10 days (investment and lost foam) |
| Tooling design, approval and wax die | Included in the sampling window |
| Your approval of the sample | At your end |
| Series casting | 25 days at MOQ 500 pcs |
| Machining, heat treatment & finishing | Included in the production lead time |
| Final inspection & export packing | Included in the production lead time |
| Inland transport and shipment | Arranged per shipment |
Sampling is 10 days and production 25 days at MOQ 500 pcs. Confirmed dates are stated in writing on the order acknowledgement, not just in the quotation.
Packaging & labelling
Castings are heavy and machined faces are easily damaged in transit. Packaging is specified with you at quotation stage, not improvised at the loading dock.
VCI film, desiccant packs, foam or cardboard separation between machined faces. Rust prevention to your required shelf life.
Your part number, description, quantity, batch and heat number, barcode or QR, and country of origin marking.
Plywood or heat-treated pallets, strapping, corner protection and a container loading plan supplied before dispatch.
One PDF with the tolerance tables, material cross-references, packaging options and the RFQ checklist — useful to circulate internally before you commit.
Send one drawing you already buy elsewhere. We will quote it with tooling, unit price, lead time and payment terms in writing — a fair, like-for-like comparison.