SS416 / SUS416 Stainless Steel Plate — Rare in Plate Form Ready in Stock Cut to Size.
SS416 stainless steel plate is one of the hardest grades to source in the region — mostly in round bars or hexagon bars.Finding it in plate form, ready to cut to your required dimensions, is a genuine challenge for engineers and machinists.
E Steel Sdn. Bhd. stocks 416 stainless steel plates in Klang, Selangor, and offers bandsaw cutting to your exact size with no minimum order.
Whether your drawing calls it SS416, SUS416, AISI 416, EN 1.4005, DIN 1.4005, UNS S41600, or X12CrS13 — we have it, and we can cut it.
What Is SS416 / SUS416 Stainless Steel?
AISI 416 (SS416 / SUS416) is a free-machining martensitic stainless steel — and it holds the title of the most machinable stainless steel grade ever developed, with a machinability rating of approximately 85% relative to free-machining carbon steel.
No other stainless steel grade comes close.
Like grade 303, it achieves this through a deliberate addition of sulphur (min 0.15%), which causes chips to break cleanly during cutting and dramatically reduces tool wear.
But unlike 303, which is austenitic and cannot be hardened. SS416 is martensitic, meaning it can be heat treated (quenched and tempered) to a wide range of hardness and strength levels.
This combination : maximum machinability plus hardenability and makes 416 the preferred grade when a component needs both excellent CNC machinability and high final hardness or wear resistance.
Why is SS416 Stainless Steel Plate Rare?
Most of the stainless steel SS416 production goes into round bar or hex bar — the standard starting forms for turned and machined parts.
Plate form is produced in much smaller quantities and is not routinely stocked by general steel distributors. Engineers who need a plate in SS416 often struggle to find plate stock locally in Malaysia or Singapore, and result to machining in high costs.
We solve that problem.
Stainless Steel 416 vs 303 — Which Free-Machining Grade Do You Need?
Both are free-machining stainless steels with sulphur additions. Here is how they differ:| SS416 / SUS416 / 1.4005 | SS303 / SUS303 / 1.4305 | |
|---|---|---|
| Steel family | Martensitic (magnetic) | Austenitic (non-magnetic) |
| Machinability | ~85% — highest of all SS | ~75–80% |
| Can be hardened? | Yes — by heat treatment | No |
| Corrosion resistance | Moderate (lower Cr, no Ni) | Good (18% Cr, 8% Ni) |
| Weldability | Poor | Poor |
| Magnetic? | Yes | No (in annealed state) |
| Best for | High-strength, hardened, wear-resistant machined parts | Corrosion-resistant machined parts |
| Typical applications | Shafts, gears, valve stems, firearm parts, pump shafts | Fittings, fasteners, precision fixtures |
Important : Limitations of SS416
Know before you specify:
Lower corrosion resistance than 300-series — 416 has only 12–14% Cr and no nickel. Not suitable for marine, humid, or chemical environments without additional surface treatment.
Magnetic — unlike 303 or 304, 416 is always magnetic. If your application requires non-magnetic material, 416 is not suitable.
Do not confuse with SS416 Se — AISI 416 Se (Selenium-bearing variant, UNS S41623) is a separate grade where selenium replaces sulphur. Properties are similar but the grade is even rarer. Confirm your drawing requirement with us.
