Sand Casting from Vietnam.
50-Point Audited Foundries. 16+ FTA Markets.
Gray iron, ductile iron, carbon steel, stainless, and aluminum sand castings from our Dolphin-audited Vietnam foundry network. Every foundry verified on-site — OES spectrometer confirmed, ductile iron nodularity procedures checked, VCCI Form B COO documentation managed.
Pattern tooling from $500 · 178+ audited factories · 16+ FTAs · Real photos, real audits
Audited Casting Foundries in Vietnam
Real on-site photographs from audited iron and metal casting foundries in our Vietnam network.
Packaging Area 2
Gravity Casting Pro Joint Stock Company
Machine Operating Instructions 1
Hitech Mould Company Limited
 DIE-CASTING/XINKE - Photo/2020731/Golden samples.jpg)
Golden Samples
Xinke Photo
Product 10
Gia Phat Mold Mechanical Production Trading Company Limited
Warehouse Area 2
Ontops Industry Company Limited
 DIE-CASTING, CNC/VISION - Photo/2020801/Samples room.jpg)
Samples Room
Vision Photo
178+
Audited Factories
1,700+
Real Factory Photos
50-pt
Dolphin Audit
16+
Free Trade Agreements
The Sand Casting Quality Problem — And How We Solve It
Most sourcing platforms list casting factories without ever stepping inside. The quality risks in sand casting are invisible until your parts fail.
Sourcing Without Dolphin Audit
- ✗No spectrometer verification: You receive a material cert — but you have no way to know if the foundry actually performed spectrometer analysis or is issuing certs from a template.
- ✗Ductile iron nodularity unknown: If the foundry skips the nodularity check, a casting that looks fine and passes hardness may have insufficient spheroidal graphite — and fail fatigue in service.
- ✗COO documentation risk: A foundry using Chinese scrap iron with incomplete melt records may issue VCCI Form B — but it won't withstand CBP scrutiny. You bear the tariff liability.
- ✗Marketing photos vs reality: The catalog shows a modern foundry. The actual facility is a small local shop with no QC instruments.
Dewin Dolphin Audit Approach
- ✓OES spectrometer confirmed on-site: Our auditor physically inspects and verifies the spectrometer is operational and calibrated. We photograph the instrument, model/serial, and calibration sticker.
- ✓Nodularity procedure verified: For ductile iron foundries, we confirm the nodularity inspection procedure and review recent inspection records. Foundries without this procedure are not recommended.
- ✓Melt record review: We review the foundry's scrap sourcing documentation and VCCI registration history for COO anti-circumvention compliance.
- ✓1,700+ real photos: Every factory in our network is photographed on-site — foundry floor, spectrometer, ladles, pattern shop, inspection area. No stock photography.
50-Point Dolphin Audit — Sand Casting Focus
How our 5-pillar Dolphin Audit applies specifically to sand casting foundry verification.
| Audit Pillar | Sand Casting Verification Criteria | Why It Matters for Global Buyers |
|---|---|---|
| Pillar 1: Facility & Safety | Molten metal handling procedures, ladle maintenance, foundry ventilation, PPE compliance for high-temperature environments | Unsafe foundry = inconsistent process control. Foundries cutting safety corners typically cut metallurgy corners too. |
| Pillar 2: Equipment & Capacity | OES spectrometer confirmed operational + calibrated. Induction/arc furnace capacity. Pattern inventory. Core-making equipment. Knockout and fettling equipment. | No spectrometer = no reliable material cert. Dewin will not recommend a casting foundry without confirmed OES. |
| Pillar 3: Quality Systems | Brinell hardness tester per ASTM E10. Nodularity inspection for ductile iron. NDT capability: VT, PT, MT, UT, X-ray. Heat log record retention. ISO 9001 QMS. | Ductile iron with insufficient nodularity will fail fatigue. These can only be caught with verified QC instruments. |
| Pillar 4: Workforce & Management | Metallurgist or trained charge calculation capability. Mold rammer/operator qualification. English drawing review capability. Management responsiveness. | Foundries without dedicated metallurgy competency produce inconsistent chemistry across heats — even with spectrometer. |
| Pillar 5: Export Compliance | VCCI registration and Form B issuance history for iron/steel castings. Domestic raw material sourcing records. Scrap metal origin documentation. | CBP actively audits Vietnam iron casting COO claims. Foundries using Chinese scrap with incomplete melt records are high-risk. |
16+ FTA Markets — Duty Advantage per Destination
Vietnam's FTA network gives global buyers preferential duty rates in key manufacturing import markets. Sand castings from Vietnam reach the world's top buyer markets with significant tariff advantages.
USA 🇺🇸
$0 Section 301US-Vietnam BTA + MFN · CO: VCCI Form B
Iron/steel castings (HTS Ch.73): China pays 25% Section 301; Vietnam pays $0. Directly comparable hard landed-cost advantage.
European Union 🇪🇺
0% on most castingsEVFTA (in force Aug 2020) · CO: EUR.1 Certificate
Iron and steel castings (HS Ch.73): staged to 0% within EVFTA schedule — most already 0% as of 2024–2025. Form EUR.1 required.
CPTPP Nations 🌏
Reduced MFN → 0%CPTPP (11 nations) · CO: CO Form (CPTPP)
Japan, Canada, Australia, Mexico, New Zealand and 6 others. Staged tariff reductions on manufactured goods including castings.
United Kingdom 🇬🇧
EU-equivalent ratesUKVFTA (in force May 2021) · CO: EUR.1 or UKVFTA CO
Post-Brexit UK maintained similar preferences to EVFTA. Vietnam is one of few Asian countries with both EU and UK FTAs.
Vietnam Sand Casting Factory Network
Our audited Vietnam foundry network covers all major sand casting processes and secondary operations.
| Process | Audited Factories | Materials Available | Part Weight Range | Tolerance Class | Best For |
|---|---|---|---|---|---|
| Green Sand Casting | 18+ | Gray iron, ductile iron, carbon steel, aluminum, copper alloys | 0.5–5,000 kg | CT8–CT10 | Most cost-effective for 50–50K/yr programs; widest material range |
| No-Bake (Chemical Bond) | 12+ | Gray iron, ductile iron, carbon steel, stainless steel | 10–50,000 kg | CT6–CT8 | Best for large or complex castings; tighter tolerances than green sand |
| Shell Mold Casting | 8+ | Gray iron, ductile iron, aluminum, carbon steel | 0.1–25 kg | CT5–CT7 | Near-net-shape; approaches investment casting surface quality at lower tooling cost |
| Post-cast CNC Machining | 40+ | All cast alloys | Any | ±0.05mm+ | Critical surface machining coordinated by Dewin; FAI/PPAP documentation included |
Dewin vs Alternatives: Sand Casting Sourcing
Most sourcing platforms list foundries without any on-site verification. Here's how Dewin's Dolphin Audit approach compares.
| Verification Factor | Dewin (Dolphin Audit) | Alibaba / B2B Platform | Trade Fair Discovery |
|---|---|---|---|
| OES spectrometer confirmed on-site | Physically verified, photographed, calibration checked | Not checked | Not checked |
| Ductile iron nodularity procedure | Procedure reviewed, recent records inspected | Unknown | Unknown |
| Heat log / melt record review | COO anti-circumvention review performed | Not checked | Not checked |
| Real foundry floor photos | 1,700+ real on-site photos | Supplier-provided marketing photos | Booth photos only |
| QCLDM quality score | 50-point numerical score, Tier 1–3 | No scoring system | No scoring system |
| FTA / COO document management | VCCI Form B managed per shipment | Buyer's responsibility | Buyer's responsibility |
How We Manage Your Sand Casting Sourcing
6-step managed sourcing process from drawing to delivery, with on-ground Vietnam team at every stage.
RFQ & Process Selection
Submit drawing (2D or 3D). Our team recommends green sand, no-bake, or shell mold based on alloy, weight, complexity, and annual volume. DFM feedback on shrinkage allowance, draft, and coring requirements before tooling order.
Dolphin-Audited Foundry Match
We match your part to QCLDM-scored foundries with confirmed OES spectrometer, relevant alloy experience, and appropriate capacity. You receive a factory profile with real photos, QCLDM score, and capability breakdown.
Pattern/Tooling Oversight
On-site oversight of pattern or matchplate fabrication. Dimensional verification of pattern before first trial pour. Core box review for complex internal geometries.
FAI & Material Certification
First article dimensional report. Spectrometer chemistry cert (EN 10204 3.1). Brinell hardness per ASTM E10. Nodularity report for ductile iron (ASTM A247). NDT if specified by drawing. PPAP Level 2/3 for automotive applications.
PSI + FTA COO Documentation
Pre-shipment inspection: AQL dimensional and visual sampling. VCCI Form B (USA), EUR.1 (EU/UK), or CPTPP CO issued per destination market. Melt record documentation package for anti-circumvention compliance.
Export & Global Delivery
Vietnam export declaration. Destination-country customs entry support. DDP and FOB options available. Full shipment document package: material cert, PSI report, CO, packing list.
What Global Buyers Say
"The Dolphin Audit gave us proof that the foundry had a working spectrometer. That single verification removed more risk from our sourcing decision than any ISO cert ever has. We've been sourcing gray iron pump housings from Dewin's network for over a year with zero chemistry rejections."
Francisco García Quintana
🇺🇸 Founder, LAROME
"We needed ductile iron structural brackets for agricultural equipment — a safety-critical application. Dewin's team not only found us an audited foundry but managed the nodularity verification and provided ASTM A247 inspection records with the first article. That's the quality documentation we need."
Greg L. Wilhite
🇺🇸 President, DOMS
"Sourcing industrial machinery castings from Vietnam was a risk I wasn't sure about. Dewin's Dolphin Audit report — with the real photos of the foundry, the spectrometer, the Brinell tester — made it concrete. These are real factories with real quality instruments."
Vishnu Shanker
🇺🇸 VP Operations, Texas Technology
Frequently Asked Questions
How does Dewin verify Vietnam foundry chemistry quality?
What FTA markets can Vietnam sand castings reach duty-advantaged?
What is the Dolphin Audit QCLDM score for sand casting foundries?
How do you verify ductile iron quality in Vietnam foundries?
What secondary operations can Vietnam sand casting foundries provide?
Ready to Source Vietnam Sand Castings?
Get a quote from our Dolphin-audited foundry network. Include your drawing, alloy grade, weight, annual volume, and destination market for FTA rate confirmation.