SUS310S Stainless Steel Round Bar | SUS310 | SS310 Round Bar Supplier & Stockist 

E Steel Sdn. Bhd. is the leading supplier of SUS310 / SUS310S stainless steel round bars (SS310, SS310S, AISI 310) in Malaysia, supplying customers across Selangor, Kuala Lumpur, Johor, Penang, and Singapore, and exporting to Indonesia, Brunei, and other ASEAN countries.

We stock full-length round bars — sometimes also searched for as SUS310 shaft rods or SS310 rods — and we don't only supply full length.
We offer precision bandsaw cut-to-size service, so you only pay and carry away the length you actually need.
No minimum order (MOQ) required.
 

What Is SUS310 / SUS310S Stainless Steel Round Bar?

SUS310 combines excellent high-temperature properties with good ductility and weldability, and is designed specifically for high-temperature service. It resists oxidation in continuous service at temperatures up to 1150°C, provided reducing sulphur gases are not present, and is also suitable for intermittent service at temperatures up to 1040°C.

SUS310S (UNS S31008) is the lower-carbon variant, used where the application environment involves moist corrodents at a temperature range lower than typical "high temperature" service. The reduced carbon content of 310S lowers its high-temperature strength compared to standard SUS310, but improves resistance to carbide precipitation and subsequent aqueous corrosion.

Like other austenitic grades, both SUS310 and SUS310S offer excellent toughness, even down to cryogenic temperatures, although other grades are normally selected for that specific environment.

SUS310 vs SUS310S — Which One Do You Need?

• SUS310 — higher carbon content, higher high-temperature strength, best for continuous or intermittent high-heat service up to 1150°C
• SUS310S — lower carbon content, reduced risk of carbide precipitation, better suited where moist corrosive conditions and subsequent aqueous corrosion resistance matter alongside heat resistance
   

Grade Equivalents — All the Ways Customers Search for SUS310 / SUS310S

Customers often search using different material code systems, or refer to this product simply as SUS310 rod, SS310 shaft, or SS310 round bar.
The table below covers the formal standard equivalents.

Our SUS310 / SUS310S Round Bar Stock — Origin & Sizes

We stocked SUS310/SUS310S stainless steel round bars as per below: 
If you are looking for SS310s Plates, may refer to this link : Stainless Steel 310s Plate

Need a size not listed? Call or WhatsApp us — we source non-standard diameters through our global procurement network with short lead times.

Not Just Full-Length Bars — We Supply Bandsaw Cut-to-Size Too

E Steel supplies both full-length bar and bandsaw cut-to-size, down to the exact lengths on your cutting list.
This means you don't need to buy a full-length bar and cut the remainder yourself, and you don't need to source a separate cutting service. 

We operate multiple bandsaw cutting machines at our Klang warehouse, dedicated to cold-cutting stainless steel bar. Bandsaw cutting is our preferred method — and the method we recommend to customers — because it delivers:

• ✅ Clean, burr-minimal cut face — ready for machining or direct use
• ✅ No heat-affected zone (HAZ) — the cut stays cold, so the material's microstructure at the cut end is undisturbed
• ✅ No surface discoloration or oxide scale — unlike thermal or friction-based cutting methods
• ✅ Consistent, square cut face — minimal distortion even on larger diameters
• ✅ Efficient and fast — quick turnaround even for complex multi-length cutting lists
• ✅ No minimum order quantity — from a single cut piece to a full cutting list

Chemical Composition of SUS310 / SUS310S Stainless Steel Round Bars

Mechanical Properties of SUS310 / SUS310S Stainless Steel Round Bars

Corrosion Resistance of SUS310 / SUS310S

The high chromium content — intended primarily to boost high-temperature performance — also gives SUS310/SUS310S good aqueous corrosion resistance. The Pitting Resistance Equivalent (PRE) is approximately 25, giving seawater resistance broadly similar to SS316 at ambient temperature.

At normal temperatures, SUS310/SUS310S shows excellent resistance, and in high-temperature service it exhibits good resistance to oxidising and carburising atmospheres. It resists fuming nitric acid at room temperature and fused nitrates up to 425°C. It is subject to stress corrosion cracking, but is more resistant than SS304 or SS316 in this respect.

Heat Resistance of SUS310 / SUS310S

SUS310/SUS310S offers good resistance to oxidation in intermittent service in air at temperatures up to 1040°C, and up to 1150°C in continuous service. It also has good resistance to thermal fatigue and cyclic heating, and is widely used where sulphur dioxide gas is present at elevated temperatures.

Continuous use in the 425–860°C range is not generally recommended if subsequent aqueous corrosion resistance is required, due to carbide precipitation, though the material often performs well in service that fluctuates above and below this range. SUS310 is typically used starting from around 800–900°C — above the effective range of grades like SS304H and SS321.

Heat Treatment

Solution treatment (annealing): heat to 1040–1150°C and cool rapidly for maximum corrosion resistance. This treatment is also recommended to restore ductility after every 1000 hours of service above 650°C, due to long-term precipitation of brittle sigma phase. SUS310/SUS310S cannot be hardened by thermal treatment.

Applications of SUS310 / SUS310S Stainless Steel Round Bar

• Furnace parts and fixtures
• Oil burner parts
• Carburising boxes
• Heat treatment baskets and jigs
• Heat exchanger components
• Shaft rods and welding filler wire

Alternative Grades to Consider

If your application does not require the full high-temperature capability of SS310, the following alternative grades may be worth considering:

Why Choose E Steel for Your SUS310 / SUS310S Round Bars?

✅ Stockist in Malaysia
Our SUS310/SUS310S round bars, sourced mostly from Japan Mill, are held at our Malaysia warehouse, ready to cut and deliver.
And we have fast shipment from overseas warehouse if it is not stocked at Malaysia Warehouse. 

✅ Serving Malaysia & Singapore + Southeast Asia Markets
We supply and export to Singapore, Indonesia, Brunei, and other ASEAN countries.

✅ Full Length or Cut to Size — Your Choice
Order a full-length bar, or send us your cutting list and we bandsaw cut it to your exact lengths.

✅ No Minimum Order Quantity (MOQ)
Whether you need one piece cut to size or a full-length bar, we accommodate all order sizes — ideal for prototyping, R&D, and small-batch production.

✅ Japan-Sourced Quality
Our SUS310/SUS310S round bars are sourced mostly from Japan. 

✅ Material Traceability
Every bar comes with a Mill Test Certificate (MTC) traceable to the original mill.