Zinc Plating • Heat Treatment • Phosphating in Chiang Mai
Finishing for small parts — screws, nuts, bolts, washers and all hardware — for factories and shops in Chiang Mai. ISO 9001:2015 with salt-spray test certificates.
We run one plant, and it is in Samut Sakhon. This page covers collection and delivery for customers in Chiang Mai — it is not a branch or a facility in Chiang Mai.
Customers in Chiang Mai can send work to V.S. Heat Treatment any business day. We specialize in high-volume small parts such as screws, nuts, bolts, washers, pins and rivets, with capacity up to 2,000 tonnes per month and in-house lab quality control on every lot.
Why factories in Chiang Mai choose us
Small-part specialists
Processes built specifically for screws, nuts, bolts and washers — minimizing parts sticking together, clogged threads and uneven coating.
Nationwide delivery
Pickup and delivery to plants in Chiang Mai through partner carriers, on time, with full piece counts on every lot.
Certified results
Every job ships with hardness (HRC) and salt-spray results to ASTM B117, ready to pass on to your end customer.
Tunable specs
Choose plating color, coating thickness and hardness level to match how the part is actually used.
Services for Chiang Mai customers
Every plating and heat-treatment process under one roof
The distance from Chiang Mai to our plant in Samut Sakhon is no obstacle. Most customers use parcel freight or their own factory transport. We help coordinate logistics and report job status at every step — contact our team to plan a pickup/delivery cycle that fits your volume.
FAQ — Chiang Mai
How do you handle work from Chiang Mai?+
Send parts via parcel freight or your factory transport to Samut Sakhon. Once finished, we ship them back with test certificates. Ask about pickup cycles via LINE or phone.
Do you accept small low-volume jobs?+
Yes — flexible minimums suit both mass production and sample/small lots. Contact us for a quote based on your real volume.
Do you provide quality certificates?+
Yes. Every lot includes hardness and salt-spray (corrosion) results under our ISO 9001:2015 system.
How long does it take?+
It depends on part type and volume, including transit to and from Chiang Mai — contact our team to agree on a delivery schedule.
About this province
What is manufactured here
The factory mix concentrated in this province decides which finishes get ordered most.
- electronics
- agro-processing
- general manufacturing & SMEs
Named estates and factory districts
Real place names in the province. IEAT-designated estates are marked.
- นิคมฯ ภาคเหนือ (ใกล้เคียง)
Parts we most often take from this area
สกรูอิเล็กทรอนิกส์ · พิน · แหวน · อะไหล่เครื่องจักรเกษตร
What work from this province has to meet
These figures come from the industries concentrated here, not from a national average.
| Property class | Salt spray | Hardness | Materials seen | Standards | |
|---|---|---|---|---|---|
| Electronics | 4.8 / 8.8 | 48–120 h NSS | ≤ ~40 HRC | carbon steel, stainless | ISO 4042 · RoHS/REACH · ISO 9227 |
| Solar Mounting & Racking Hardware | 8.8 · A2-70 / A4-70 where stainless is specified | 480–1,000 h NSS commonly requested | 22–32 HRC (class 8.8) | S45C, SCM435, SWCH10B21, SUS304 | ISO 898-1 · ISO 4042 · ISO 9227 · ISO 10683 |
| Agricultural Machinery | 8.8 / 10.9 | 240–500 h NSS | 30–50 HRC | S45C, SCM435, boron steel | ISO 898-1 · ISO 4042 |
Failure modes to watch on this kind of work
Questions we get from this province
- We are in นิคมฯ ภาคเหนือ (ใกล้เคียง) — can you take our work?
- Yes. We take work from factory districts across Chiang Mai — นิคมฯ ภาคเหนือ (ใกล้เคียง) among them — not only from designated estates. Parts travel by our own vehicles or by parcel freight, with a flexible minimum for small lots and samples.
- What specification does work from Chiang Mai usually have to meet?
- It follows the local industry mix. For Electronics, common in Chiang Mai, the usual call-out is property class 4.8 / 8.8, hardness ≤ ~40 HRC and 48–120 h NSS corrosion resistance, on carbon steel, stainless.
- What hardness do the grades from Chiang Mai reach?
- The grades seen most from this area are S20C, SWCH10B21, SUS304, S45C, SCM435, SWCH10B33. Attainable hardness varies with grade and section, and the value specified in service after tempering is always below the as-quenched ceiling — the per-grade pages carry both numbers.