Treatment changes the part. Plan for it.
Every heat treatment moves the part a little. Quenching distorts, case hardening grows surfaces. A shop that machines to final size and then sends the part out for hardening gets back a part that's out of print. We sequence it properly: rough machining with stock left on critical features, treatment, then finishing by wire EDM or grinding on the hardened part.
What we run
| Treatment | What it gives the part |
|---|---|
| Quench and temper | Through hardness with toughness, for shafts, gears and tooling that takes load |
| Carburizing | Deep hard case over a tough core, for wear parts that can be ground afterward |
| Nitriding | Very hard, thin case with minimal distortion, for precision parts that must keep their shape |
| Black oxide | Corrosion protection and a clean dark finish with virtually no dimensional change |
One roof, one set of references
Because treatment happens in our plant, your part never rides a truck between process steps. The same team that programmed the roughing fixtures the finishing, with the same datums. That's how a hardened part lands at ±0.01 mm instead of "close". It's also faster: no freight, no queue at a second vendor, no finger-pointing if something drifts.
If you're sourcing from the US, this is the practical advantage of an integrated Mexican shop: read our sourcing guide for how to compare vendors on total cost instead of hourly rate.
What heat treatments do you offer?
Quench and temper, carburizing, nitriding and black oxide finishing, integrated with machining and grinding in the same plant.
Why does in-house heat treatment matter?
Treatment moves the part dimensionally. When machining and treatment live in one plant, we rough soft, treat, then finish critical features hard, keeping the same measuring references the whole way. Parts that travel between vendors lose that.
What hardness can you reach?
Depends on the steel and the duty. We work to a target hardness range chosen for the application, up to around HRC 65 on tool steels, then finish by EDM or grinding.
Should I harden the part before or after machining?
Both, in the right order: rough machining soft, heat treat, then finish the critical dimensions on the hardened part. Asking for full machining after hardening, or hardening a finished part, is how tolerances get lost.