The grade behind Wazirabad's cutlery industry
304 stainless is the material most people picture when they hear "stainless steel." Roughly 18% chromium and 8% nickel, historically marketed as 18/8, it's the standard grade behind Wazirabad's cutlery cluster, Pakistan's third-largest cutlery exporter, where knives, forks, and spoons are made from food-grade 304. About 80% of the steel used there is sourced locally, the rest imported from Japan and Germany.
What's actually in the composition
304 runs 17.50 to 19.50% chromium and 8.00 to 10.50% nickel, with carbon capped at 0.07% to keep it weldable without excessive carbide precipitation at the grain boundaries. Manganese and silicon each top out around 1.0 to 2.0%, and small nitrogen additions (up to 0.11%) help boost strength without hurting corrosion resistance. Mechanically, 304 delivers 500 to 700 MPa tensile strength in bar form, 45% minimum elongation, and a maximum Brinell hardness around 215, numbers that explain why it's such a popular choice for deep-drawn and formed parts like sinks, saucepans, and cutlery blanks. Density is 8.00 g/cm³, melting point around 1450°C, and thermal conductivity 16.2 W/mK.
Typical published ranges, percent by weight
- Cr17.5 to 19.5%
- Ni8 to 10.5%
- Mn2%
- Si1%
- C0 to 0.07%
- P0.05%
- S0.03%
- Febalance
0%20%
Ranges are typical published values, not guaranteed for a specific batch. Confirm against the mill test certificate.
Two common variants worth knowing: 304L, a lower-carbon version (0.03% max) used in heavy-gauge components where weldability matters more than raw strength, and 304H, a higher-carbon variant for elevated-temperature service.
Where 304 stops being enough
304 handles general corrosion resistance well, but it has a known weak point: chloride exposure. Saltwater, chlorinated water, certain industrial chemicals and cleaning agents attack 304's passive oxide layer over time, leading to pitting corrosion, small localized pits that can eventually perforate thin material even while the surrounding steel looks fine. That's where 316 earns its higher price.
| Property | 304 Stainless Steel | 316 Stainless Steel |
|---|---|---|
| Category | Stainless Steel | Stainless Steel |
| Carbon (C) | 0 to 0.07% | 0.07% |
| Chromium (Cr) | 17.5 to 19.5% | 16.5 to 18.5% |
| Nickel (Ni) | 8 to 10.5% | 10 to 13% |
| Molybdenum (Mo) | Not published | 2 to 2.5% |
| Hardness | 215 HB | 215 HB |
| Density | 8.00 g/cm³ | 8.00 g/cm³ |
| Group | Austenitic stainless steel | Austenitic stainless steel, molybdenum-bearing |
Confirm against the mill test certificate before specifying. Chat with us if you need help matching a grade to a job.
What the extra alloying buys
316 adds 2.00 to 2.50% molybdenum on top of a composition otherwise close to 304 (16.50 to 18.50% chromium, 10.00 to 13.00% nickel). That molybdenum addition is specifically what improves resistance to chloride pitting and crevice corrosion. Mechanically it's comparable to 304, 500 to 700 MPa tensile strength, 40% minimum elongation, similar density and melting point, but with slightly better thermal conductivity (16.3 W/mK) and a proven track record in more aggressive environments. It's the grade specified for marine fittings, chemical processing equipment, and pharmaceutical fabrication, anywhere the environment is more aggressive than a kitchen or a general fabrication shop. Variants worth knowing here too: 316L (low carbon, better weldability), 316H (elevated temperature service), and 316Ti (titanium-stabilized, resists carbide precipitation during welding of thicker sections).
Cost versus need
316 typically costs more than 304, and for a lot of applications, general kitchen equipment, indoor fabrication, decorative work, that extra cost buys corrosion resistance the application will never actually need. The decision point is genuinely simple: is there chloride exposure, saltwater, industrial chemicals, coastal humidity, or not. If yes, 316. If it's general food-safe or decorative fabrication work like Wazirabad's cutlery trade, 304 is the right call and the right price, and pushing a customer toward 316 they don't need is a fast way to lose their business to a competitor quoting 304 correctly.
Buying either in Pakistan
304 is a high-turnover, well-understood grade for any supplier serving the cutlery or general fabrication trade, and the local-to-imported sourcing split in a cluster like Wazirabad is worth knowing when discussing lead time and pricing with a customer there. 316 is a narrower, more technical order, chemical processing and marine fabrication in Karachi's industrial areas are the more likely buyer than a general kitchenware shop, and it's worth stocking in smaller volumes with a clear understanding of who actually needs it.
Not sure which grade fits your application? Ask us about the environment your part will actually see in service.