Ferritic stainless steel grades 409, 430 and 439: magnetic, cost-effective and formable, widely used for exhausts, appliances and architectural trim. Cut to size, no MOQ.
Ferritic stainless steels are chromium-based, magnetic and low in nickel, which makes them a cost-effective alternative to austenitic grades where extreme corrosion resistance is not required. E STEEL SDN BHD supplies 409, 430 and 439 cut to size with no MOQ.
Stainless Steel 409 is a ferritic, titanium-stabilized grade designed for excellent oxidation resistance, weldability, and cost efficiency. Widely used in automotive exhaust systems and industrial applications, it offers a balance of performance and affordability. E STEEL SDN BHD, a leading Malaysia-based supplier, provides cut-to-size 409 stainless steel with no MOQ, ensuring precision and rapid global delivery via DHL/FedEx.
| Element | Composition (%) | Role |
|---|---|---|
| Chromium (Cr) | 10.5–11.7 | Corrosion and oxidation resistance |
| Titanium (Ti) | 6×C min | Stabilizes against carbide precipitation |
| Carbon (C) | ≤0.08 | Balances strength and weldability |
| Manganese (Mn) | ≤1.0 | Enhances strength and hardenability |
| Silicon (Si) | ≤1.0 | Deoxidizer and strength booster |
| Phosphorus (P) | ≤0.045 | Improves machinability |
| Sulfur (S) | ≤0.045 | Enhances machinability |
Key Insight: Titanium stabilization prevents sensitization during welding, making SS 409 ideal for exhaust systems and high-temperature components.
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 380–550 MPa | Annealed |
| Yield Strength | 170 MPa (min) | Annealed |
| Elongation | 20% (min) | 50mm gauge |
| Hardness (Brinell) | ≤200 HB | Annealed |
| Max Service Temp | 675°C (continuous) | Oxidation-resistant |
| Standard | Grade | Equivalent |
|---|---|---|
| UNS | S40900 | 409 |
| EN | 1.4512 | X2CrTi12 |
| JIS | SUS409 | – |
| ASTM | A240 | Type 409 |
| Grade | Type | Key Difference | Best For |
|---|---|---|---|
| 409 | Ferritic | Titanium-stabilized, weldable, cost-effective | Automotive exhausts |
| 430 | Ferritic | Higher Cr (16–18%), better corrosion resistance | Decorative trims, appliances |
| 439 | Ferritic | Higher Cr (17–19%), improved corrosion resistance | Water heaters, indoor applications |
sus304 is an austenitic stainless steel high in chromium and nickel with very high corrosion resistance. It is one of the most commonly produced and used stainless steel grades 409 is a ferritic stainless steel with less chromium and very little nickel.
sus409 is a less costly option for stainless steel and a lower grade. … ss409 offers less protection than stainless steel 304 and 316 stainless steel, but the lower price is an advantage to many customers.
Type 409 stainless steels have excellent resistance to exhaust gas and atmospheric corrosion, superior to that of 410 martensitic grades with 12% chromium and 3CR12. However, the corrosion resistance is lower than that of grade 430 steels containing 17% chromium.
Type 409 is a heat resisting ferritic stainless steel providing good oxidation and corrosion resistance compared to carbon steel. … The corrosion resistance of Type 409 is better than coated carbon steel, similar to that of Type 410 stainless steel, and less than that of Type 304/304L stainless steel.
Your Guide to Cost-Effective, Corrosion-Resistant Solutions for Engineering Procurement
Stainless Steel 430 is a ferritic, chromium-based alloy prized for its excellent corrosion resistance, formability, and affordability. Widely used in automotive, construction, and appliance industries, it offers a balance of performance and cost-efficiency. As a leading supplier of 400 series stainless steel based in Malaysia, E STEEL SDN BHD provides cut-to-size 430 with no MOQ, precision bandsaw cutting, and rapid air freight to Singapore via DHL/FedEx.
| Element | Composition (%) | Role |
|---|---|---|
| Chromium (Cr) | 16–18 | Corrosion and oxidation resistance |
| Carbon (C) | ≤0.12 | Balances strength and weldability |
| Manganese (Mn) | ≤1.0 | Enhances strength and hardenability |
| Silicon (Si) | ≤1.0 | Deoxidizer and strength booster |
| Property | Value |
|---|---|
| Tensile Strength | 450–600 MPa |
| Yield Strength | 310 MPa (min) |
| Elongation | 20% (min) |
| Hardness (Brinell) | ≤183 HB |
| Standard | Grade | Equivalent |
|---|---|---|
| UNS | S43000 | 430 |
| EN | 1.4016 | X6Cr17 |
| JIS | SUS430 | – |
| Grade | Type | Key Difference | Best For |
|---|---|---|---|
| 430 | Ferritic | Budget-friendly, moderate corrosion resistance | Indoor/outdoor decor |
| 304 | Austenitic | Higher corrosion resistance (costlier) | Marine/chemical environments |
| 410 | Martensitic | Higher hardness, lower corrosion | Tools, fasteners |
Stainless Steel 439, UNS S43035, SS439, SUS439, 1.4510
Stainless Steel 439: Specification, Equivalents, Properties, and Applications Your Guide to Selecting the Right Metal for Engineering Projects
Stainless Steel 439 is a ferritic, titanium-stabilized grade known for excellent corrosion resistance, formability, and cost-effectiveness. Ideal for applications requiring durability in mildly corrosive environments, it is a popular choice in automotive, construction, and appliance industries. As a global supplier with no MOQ, E STEEL SDN BHD ensures seamless procurement for projects of all scales.
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 17.0–19.0 |
| Titanium (Ti) | 0.15–0.60 |
| Carbon (C) | ≤0.03 |
| Manganese (Mn) | ≤1.00 |
| Nickel (Ni) | ≤0.50 |
| Silicon (Si) | ≤1.00 |
Key Feature: Titanium stabilization prevents sensitization and intergranular corrosion.
| Property | Value |
|---|---|
| Tensile Strength | ≥415 MPa |
| Yield Strength (0.2%) | ≥275 MPa |
| Elongation (in 50mm) | ≥20% |
| Hardness (Brinell) | ≤183 HB |
| Standard | Equivalent Grade |
|---|---|
| UNS | S43035 |
| EN | 1.4510 |
| JIS | SUS430LX |
| AISI | 439 |
Stainless Steel 439 is widely used in industries requiring moderate corrosion resistance and high formability:
| Grade | Corrosion Resistance | Formability | Cost | Best For |
|---|---|---|---|---|
| 439 | Good (stabilized) | Excellent | Low-Medium | Automotive exhausts |
| 430 | Moderate | Good | Low | Decorative trims |
| 304 | Excellent (austenitic) | Very Good | High | Marine/chemical environments |
Bandsaw technology ensures minimal kerf loss and clean, burr-free edges.
Cut to the size your job needs. No minimum order quantity.
Mill test reports (MTRs) for traceability.
Fast air and sea shipping with real-time tracking.
Yes, for cost-sensitive projects where extreme corrosion resistance isn’t critical.
Yes, all ferritic grades (409, 430, 439) are magnetic.
Not recommended; opt for 316L or duplex grades for chloride-rich settings.
For mild environments (e.g., urban areas), yes. Avoid coastal regions with high chloride exposure.
Yes, all ferritic grades (430, 409, 439) are magnetic.
Resists nitric acid well but avoid sulfuric/hydrochloric acids.
No MOQ, shipped globally from Malaysia. Send us the size and we will cut it.
