Two bins can look identical, cost 30% apart, and behave completely differently after eighteen months in a Malaysian washroom. The difference is the grade of steel — and it is invisible until the cheaper one starts to rust.
This guide explains what separates SS304 vs SS201 and SS316, which to specify for each part of a building, and — critically — how to check that you actually received the grade you paid for.
Contents
- The quick answer
- What makes stainless steel “stainless”
- SS201 — the budget grade
- SS304 — the commercial standard
- SS316 — the marine grade
- Which grade for which part of your building
- How to verify what you were actually supplied
- The cost question, honestly
- Frequently asked questions
The Quick Answer
| Grade | Key alloy content | Corrosion resistance | Specify it for |
| SS201 | ~4% nickel, manganese-substituted | Moderate | Dry indoor areas — lobbies, corridors, offices, air-conditioned public spaces |
| SS304 | 8–10.5% nickel, 18% chromium | High | Washrooms, kitchens, hospitals, F&B, humid or sheltered outdoor areas |
| SS316 | 10–14% nickel, plus 2–3% molybdenum | Highest — resists chlorides | Coastal sites, pool decks, salt-air exposure |
In one sentence: SS201 for dry indoor placement, SS304 for anything wet or food-adjacent, SS316 only where salt is genuinely a factor.
What Makes Stainless Steel “Stainless”
Stainless steel resists rust because chromium in the alloy reacts with oxygen to form an invisible, self-repairing passive layer across the surface. Scratch it, and the layer reforms within seconds. Therefore, the steel underneath stays protected.
However, that passive layer is not indestructible. Chlorides — from salt air, cleaning chemicals, and even sweat — break it down locally and cause pitting corrosion. Nickel and molybdenum are what strengthen the layer’s resistance to that attack. Consequently, the more nickel and molybdenum in the alloy, the harsher the environment it survives.
This is the entire basis of the grade system. Everything else follows from it.
SS201 — The Budget Grade
SS201 is a 200-series austenitic stainless steel developed during a period of high nickel prices. Manufacturers substituted manganese and nitrogen for much of the nickel, cutting cost substantially. As a result, SS201 typically contains around 4% nickel against SS304’s 8% or more.
Where it works. In dry, air-conditioned indoor environments — mall corridors, hotel lift lobbies, office floors, reception areas — SS201 performs perfectly well and looks identical to SS304. Furthermore, it is harder than SS304, so it resists denting slightly better in high-traffic public zones.
Where it fails. Put SS201 in a washroom, a commercial kitchen, or anywhere exposed to humidity and chloride-based cleaning products, and it will pit and stain — usually within twelve to twenty-four months in Malaysian conditions. Above all, it is not suitable for outdoor placement anywhere in Malaysia.
The honest position. SS201 is not a fraud grade. It is a legitimate material with a legitimate application window. The problem arises when it is supplied for applications outside that window, either through supplier ignorance or deliberate substitution.
SS304 — The Commercial Standard
SS304 is the default specification for commercial stainless steel worldwide, and for good reason. With 18% chromium and 8–10.5% nickel, it delivers strong corrosion resistance across virtually every indoor application and most sheltered outdoor ones.
Why hospitals and kitchens specify it. The surface is non-porous, which prevents bacterial colonisation in seams and joints. In addition, it tolerates the acids, alkalis, and disinfectants used in daily commercial cleaning without degrading. Therefore, food service operators and healthcare facilities specify SS304 as a hygiene requirement, not merely a durability one.
Malaysian relevance. Malaysia’s year-round humidity accelerates metal corrosion substantially faster than temperate climates. Consequently, the gap between SS201 and SS304 performance opens up much faster here than it would in Europe or North America. A grade choice that seems marginal in a specification document becomes obvious within two years on site.
SS316 — The Marine Grade
SS316 adds 2–3% molybdenum to the SS304 formula. That single addition dramatically improves resistance to chloride pitting — which is why it is the standard for marine, coastal, and chemical-processing environments.
Where it earns its cost. Coastal properties in Penang, Langkawi, Kota Kinabalu, and along the Johor and Terengganu coastlines. Swimming pool decks and spa areas, where chlorinated water is constantly airborne. Any exterior installation within roughly a kilometre of open sea.
Where it is wasted money. Indoors. An SS316 bin in an air-conditioned office lobby will outlast the building, but so would SS304 at a meaningfully lower price. Therefore, specifying SS316 as a blanket standard across a mixed portfolio is over-engineering — and any supplier who encourages it without asking about your locations is selling rather than advising.
Which Grade for Which Part of Your Building
Most buildings need more than one grade. Here is how NORDVOX advises specifying across a typical commercial property.
| Zone | Recommended grade | Reason |
| Hotel lobby, reception | SS201 or SS304 | Dry and air-conditioned; SS201 acceptable where budget matters |
| Guest rooms | SS201 or SS304 | Dry indoor; SS304 if the bathroom bin is included |
| Washrooms | SS304 | Humidity plus chloride cleaning agents |
| Commercial kitchen | SS304 | Food acids, steam, aggressive daily cleaning |
| Hospital wards and clinics | SS304 | Disinfectant exposure and hygiene requirement |
| Mall concourse (enclosed) | SS201 or SS304 | Air-conditioned; SS304 near food courts |
| Food court | SS304 | Spills, humidity, frequent wet cleaning |
| Covered walkway, car park | SS304 | Ambient humidity and rain ingress |
| Open outdoor, inland | SS304 | Full weather exposure |
| Pool deck, spa | SS316 | Airborne chlorides |
| Coastal exterior | SS316 | Salt-laden air |
How to Verify What You Were Actually Supplied
This section matters more than any other, because grade substitution is common and difficult to detect after installation.
The magnet test does not work — and here is why
You will frequently be told to test stainless steel with a magnet, on the basis that “real” stainless is non-magnetic. This is misleading. Both SS201 and SS304 are austenitic steels, and both are essentially non-magnetic in their annealed state. Furthermore, both become slightly magnetic after cold working — which every pressed or formed bin body has undergone.
Consequently, a magnet tells you only that the material is austenitic rather than a 400-series ferritic steel. It cannot distinguish SS201 from SS304. Any supplier who offers a magnet as proof of grade is either mistaken or hoping you are.
What actually works
- Mill certificate. Ask for the material test certificate from the steel supplier, showing the heat number and chemical composition. Reputable suppliers produce this without hesitation.
- XRF analyser. A handheld X-ray fluorescence gun reads alloy composition in seconds and is definitive. Testing labs across Klang Valley offer this as a paid service, and it is worth commissioning on any large order.
- Nickel spot test kit. A chemical reagent test that indicates nickel content. Less precise than XRF but inexpensive and useful for spot-checking a delivery.
- Salt spray testing. Laboratory accelerated corrosion testing to ASTM B117. Overkill for most procurement, but appropriate for large coastal projects.
Write it into the purchase order
The most effective protection is contractual. Specify the grade explicitly in the purchase order, require a mill certificate at delivery, and reserve the right to independent testing at the supplier’s cost if the grade is disputed. Therefore, substitution becomes a breach rather than an argument.
The Cost Question, Honestly
SS201 is genuinely cheaper — typically 20–30% below SS304 for an equivalent product, driven almost entirely by the nickel content difference. SS316 typically carries a further 25–40% premium over SS304.
However, the comparison that matters is cost over service life, not cost at purchase. A SS201 bin that pits and stains in a washroom within two years must be replaced. A SS304 bin in the same position will still look presentable after a decade. Consequently, the cheaper bin is only cheaper if it is installed where it belongs.
The sensible approach is a mixed specification: SS201 where the environment is genuinely dry, SS304 as the default everywhere else, SS316 only for coastal and pool-adjacent placement. Above all, a supplier who quotes a single grade across an entire building without asking about zones is not advising you — they are simplifying their own order processing.
How NORDVOX Approaches This
NORDVOX has supplied stainless steel bins to Malaysian hotels, hospitals, malls, and councils since 1991. We stock SS201, SS304, and SS316, and we quote by zone rather than by building. As a result, some of our quotations come in lower than competitors who default everything to SS304, and some come in higher where a coastal site genuinely requires SS316.
Browse the full stainless steel bin range, or contact NORDVOX with a floor plan and we will advise on grade zone by zone.
Frequently Asked Questions
What is the difference between SS201 and SS304?
SS304 contains 8–10.5% nickel; SS201 substitutes much of that nickel with manganese, containing only around 4%. Consequently, SS304 resists corrosion substantially better, particularly in humid or chloride-exposed environments. SS201 is cheaper and suits dry, air-conditioned indoor use only.
Can you tell SS304 from SS201 with a magnet?
No. Both are austenitic steels and both are essentially non-magnetic when annealed, becoming slightly magnetic after forming. A magnet only distinguishes austenitic 200/300-series steel from ferritic 400-series steel. To verify grade, request a mill certificate or commission XRF testing.
Which stainless steel grade should I use in a washroom?
SS304 as a minimum. Washrooms combine humidity with chloride-based cleaning products, which attack the passive layer on lower-nickel steels. SS201 will typically pit and stain within one to two years in Malaysian washroom conditions.
Do I need SS316 for outdoor bins in Malaysia?
Only near the coast. For inland outdoor placement, SS304 is sufficient. SS316 becomes necessary within roughly a kilometre of open sea, and around swimming pools and spas where airborne chlorides are present.
Why does stainless steel rust in Malaysia?
Stainless steel resists rust through a chromium-oxide passive layer, but chlorides from salt air and cleaning chemicals break that layer down locally, causing pitting. Malaysia’s year-round humidity accelerates this process considerably compared with temperate climates. Therefore, grade selection matters more here than in cooler countries.
Is SS201 stainless steel worth buying at all?
Yes, within its application window. In dry, air-conditioned indoor spaces such as lobbies, corridors, and offices, SS201 performs well, looks identical to SS304, and costs 20–30% less. The problem is substitution — SS201 supplied for washrooms, kitchens, or outdoor use will fail early.
How can I make sure my supplier delivers the grade I ordered?
Specify the grade explicitly in the purchase order, require a mill test certificate at delivery, and reserve the right to independent XRF testing at the supplier’s cost if the grade is disputed. This makes substitution a contractual breach rather than a matter of opinion.
Does NORDVOX supply all three grades?
Yes. NORDVOX stocks SS201, SS304, and SS316 stainless steel bins and quotes by building zone rather than applying a single grade across an entire property. NORDVOX is registered with the Ministry of Finance Malaysia (Reg. No. 357-02238912) and delivers nationwide.
