Zinc Plating • Heat Treatment • Phosphating in Roi Et
Finishing for small parts — screws, nuts, bolts, washers and all hardware — for factories and shops in Roi Et. 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 Roi Et — it is not a branch or a facility in Roi Et.
Customers in Roi Et 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 Roi Et 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 Roi Et 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 Roi Et customers
Every plating and heat-treatment process under one roof
The distance from Roi Et 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 — Roi Et
How do you handle work from Roi Et?+
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 Roi Et — 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.
- agro-processing
- general manufacturing & SMEs
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 | |
|---|---|---|---|---|---|
| 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
- What specification does work from Roi Et usually have to meet?
- It follows the local industry mix. For Agricultural Machinery, common in Roi Et, the usual call-out is property class 8.8 / 10.9, hardness 30–50 HRC and 240–500 h NSS corrosion resistance, on S45C, SCM435, boron steel.
- What hardness do the grades from Roi Et reach?
- The grades seen most from this area are S45C, SCM435, SWCH10B33, SUP9. 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.