Stainless Steel Machining Services

CNC machining, threading, grinding & welding for 304, 316, 17-4PH and more.

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ISO 9001:2015

Made in Canada

40+

Years of Experience

5K+

Satisfied Customers

Overview

Whether it’s 304, 316, 17-4PH, or duplex alloys — Pearson provides high-precision stainless steel machining through a hybrid fulfillment model. Projects are completed in-house or through trusted Canadian partners, with coordinated quoting, QA, and logistics to meet food-grade, marine, and structural standards.

Quick Specs

Common Grades

304, 316/316L, 17-4PH, 303, 410, Duplex

Finishes

32 Ra+, passivation, electropolish (per spec)

Typical Ops

Milling, turning, threading, grinding, welding

Tolerances

±0.002″ typical; tighter by review

Our Capabilities

Our stainless machining capabilities — offered in-house or via certified partner shops — include:

CNC Machining: milling, drilling & pocketing with coolant-optimized tooling
Manual Machining: fitments, custom tooling & low-volume stainless parts
Turning: shafts, pins, flanges & valve components with high finishes
Threading: UNC, UNF & metric internal/external threads in stainless alloys
Welding: TIG & MIG welding of enclosures, tanks & structural frames
Surface Grinding: precision flatness & thickness control
Prototyping & Repair: sanitary component repair, test parts & legacy rework
Installation Prep: brackets, frames & assemblies ready for deployment

Why Stainless Steel?

Exceptional corrosion & chemical resistance for harsh environments
Sanitary-grade finishes for food, medical & pharmaceutical use
High strength & wear resistance under cyclic loads
Smooth, weld-clean finishes to meet sanitary standards
Versatile alloy support from general-purpose to duplex grades

Our Equipment

Equipment listed below is used at our Ontario shop or by qualified stainless steel partners:

3- and 4-axis CNC milling centers with stainless-steel tooling
Manual lathes & turning centers for short runs
Precision drill presses & tapping rigs
Surface & cylindrical grinders with specialized wheels
TIG/MIG welding stations with purge chambers
Cleanroom-compatible finishing stations

Common Grades We Work With

304 – general-purpose stainless with good machinability
316/316L – marine & medical-grade corrosion resistance
17-4PH – precipitation-hardened for strength & wear
303 – free-machining alloy for complex features
410 & duplex steels – high strength & corrosion performance

Grade	Key Traits	Typical Uses
304	General-purpose; good corrosion resistance	Frames, brackets, enclosures
316/316L	Enhanced corrosion; molybdenum; low-carbon weldability	Marine, food/medical, chemical
17-4PH	High strength via precipitation hardening	Valves, shafts, tooling fixtures
303	Free-machining for complex features	High-detail fittings, fasteners
Duplex (e.g., 2205)	High strength + chloride stress-corrosion resistance	Offshore, process piping

Typical Applications

Food processing equipment & sanitary piping
Medical device housings & surgical components
Chemical process manifolds & valves
Marine fittings & offshore hardware
Automation frames & safety enclosures

FAQ

Do you machine true sanitary finishes?

Yes—we deliver finishes to 32 Ra or better and coordinate electropolishing or passivation with certified partners as needed.

What tolerances can you hold on stainless steel?

We routinely hold ±0.002″ (±0.05 mm), with tighter tolerances available depending on part geometry and production method.

How do you avoid contamination during welding?

We use purge chambers, stainless filler rod, and post-weld cleaning. Welding is performed either in-house or through our certified stainless partners.

Can you handle both prototype and volume runs?

Yes—Pearson supports everything from one-off sanitary prototypes to small-batch stainless production. Jobs are fulfilled in-house or through our Canadian partner network.

Is this manufactured in-house?

Some stainless parts are produced at our Ontario facility. Others are fulfilled through trusted Canadian manufacturing partners. Pearson oversees sourcing, QA, and delivery across both.