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Stainless Steel 409/410 Flat, Square, and Hex Bars are martensitic stainless steel grades known for their excellent mechanical strength and moderate corrosion resistance. These bars offer good oxidation resistance and high durability, making them suitable for a wide range of industrial applications. Stainless Steel 409/410 Flat, Square, and Hex Bars are widely used in automotive exhaust systems, heat exchangers, and machinery parts. They maintain stability under high-temperature conditions and offer a good balance between performance and cost. Their versatility makes them ideal for both fabrication and structural purposes.
The chemical composition of Stainless Steel 409/410 Flat, Square, and Hex Bars includes chromium as the main alloying element, which provides oxidation and corrosion resistance. Grade 409 contains lower chromium and is mainly used for applications exposed to moderate environments, while 410 has higher carbon content, improving hardness and strength. Both grades offer excellent wear resistance and moderate formability. Stainless Steel 409/410 Flat, Square, and Hex Bars provide reliable performance in oxidizing environments such as automotive exhaust and heat-treating systems.
Stainless Steel 409/410 Flat, Square, and Hex Bars exhibit excellent mechanical properties, including high tensile strength, toughness, and hardness. Grade 410 offers superior mechanical strength compared to 409 due to its higher carbon and heat-treatable nature. These bars retain good dimensional stability even under fluctuating thermal conditions. Stainless Steel 409/410 Flat, Square, and Hex Bars can withstand moderate corrosion in dry or mildly humid conditions. Their strength and hardness make them suitable for engineering components and fasteners.
One of the main advantages of Stainless Steel 409/410 Flat, Square, and Hex Bars is their excellent resistance to oxidation and scaling at high temperatures. They maintain structural integrity even when exposed to heat for prolonged periods. Grade 409 is commonly used in exhaust systems where corrosion resistance and thermal stability are required. Grade 410, on the other hand, is preferred for applications demanding higher hardness and wear resistance. These bars perform effectively in both mechanical and thermal applications.
Stainless Steel 409/410 Flat, Square, and Hex Bars are easy to fabricate and machine using standard industrial techniques. Grade 410 can be hardened through heat treatment processes such as quenching and tempering, while Grade 409 is mainly used in the annealed condition. These bars offer good weldability, though preheating may be necessary to prevent cracking during welding. Stainless Steel 409/410 Flat, Square, and Hex Bars can be polished or surface-finished for improved appearance and corrosion protection. Their machinability enhances their usability in various fabrication projects.
Applications of Stainless Steel 409/410 Flat, Square, and Hex Bars include automotive components, chemical processing equipment, pump shafts, fasteners, and structural frameworks. They are also used in industrial furnaces, heat exchangers, and mechanical assemblies requiring strength and wear resistance. Stainless Steel 409/410 Flat, Square, and Hex Bars perform well in both moderate and high-temperature environments. Their durability ensures a long service life even under demanding conditions. These properties make them a cost-effective choice for manufacturing industries.
In conclusion, Stainless Steel 409/410 Flat, Square, and Hex Bars offer a dependable combination of strength, corrosion resistance, and heat stability. They are ideal for applications requiring durability, moderate corrosion resistance, and good machinability. Stainless Steel 409/410 Flat, Square, and Hex Bars provide long-lasting performance in automotive, industrial, and mechanical environments. Their versatility across fabrication, welding, and finishing processes makes them highly adaptable. Overall, these stainless steel grades deliver reliable performance and excellent value for industrial applications.
Specification Table
| Grade | Type | Form | Standard | Surface Finish | Applications |
|---|---|---|---|---|---|
| SS 409 | Ferritic Stainless Steel | Flat Square Hex | ASTM A276 / A240 | Hot Rolled / Cold Rolled | Automotive exhaust systems, Heat exchangers, Industrial equipment |
| SS 410 | Martensitic Stainless Steel | Flat Square Hex | ASTM A276 / A564 | Hot Rolled / Cold Rolled / Polished | Cutlery, Pumps, Valves, Industrial machinery, Aerospace components |
Chemical Composition (Typical ranges for SS409/410)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Grade | C | Mn | Si | Cr | Ni | P | S | Mo | Other Elements |
|---|---|---|---|---|---|---|---|---|---|
| SS 409 | ≤0.12 | ≤1.0 | ≤1.0 | 10.5–11.75 | ≤0.5 | ≤0.04 | ≤0.03 | – | Ti: 0.15–0.45 (stabilizer) |
| SS 410 | 0.08–0.15 | ≤1.0 | ≤1.0 | 11.5–13.5 | 0.25 max | ≤0.04 | ≤0.03 | – | – |
Mechanical Properties (Typical)
| Grade | Hardness | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Impact Strength |
|---|---|---|---|---|---|
| SS 409 | ≤180 HB | 450–550 | 275–380 | 22–30 | – |
| SS 410 (annealed) | 180–207 HB | 450–700 | 275–450 | 18–25 | – |
| SS 410 (hardened) | 200–250 HB | 600–900 | 400–700 | 10–15 | – |
Equivalent Grades
| Grade | ASTM / ASME | EN / DIN | JIS | GB / Chinese Standard | Other Standards |
|---|---|---|---|---|---|
| SS 409 | ASTM A240, A276 | EN 10088-2:1.451 | JIS SUS 409 | GB 4237-09 / 1Cr17Ti | ISO 9448-409 |
| SS 410 | ASTM A240, A564, A276 | EN 10088-2:1.4006 | JIS SUS 410 | GB 1220-2007 / 0Cr13 | ISO 683-17 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Across Flats (mm) | Width (mm) | Thickness (mm) | Length (mm) | Weight (kg/m) |
|---|---|---|---|---|
| 10 | 10 | 10 | 1000–6000 | 0.79 |
| 12 | 12 | 12 | 1000–6000 | 1.13 |
| 16 | 16 | 16 | 1000–6000 | 1.79 |
| 20 | 20 | 20 | 1000–6000 | 2.83 |
| 25 | 25 | 25 | 1000–6000 | 4.42 |
| 30 | 30 | 30 | 1000–6000 | 6.32 |
| 35 | 35 | 35 | 1000–6000 | 8.59 |
| 40 | 40 | 40 | 1000–6000 | 11.32 |
| 50 | 50 | 50 | 1000–6000 | 17.73 |
Types Of Stainless Steel 409/410 Flat Square Hexs and Tubes
Stainless Steel Flat Hex
Monel 400 Flat Hex
Inconel 600 Flat Hex
Hastelloy Flat Hex
super Duplex Flat Hex
Duplex Flat Hex
Monel K500 Flat Hex
Nickel Flat Hex
Frequently Asked Questions (FAQ)
What is Stainless Steel 409/410 Flat Square Hex?
Stainless Steel 409 and 410 Flat Square Hex bars are types of stainless steel used in industrial applications. SS 409 is ferritic, stabilized with titanium, while SS 410 is martensitic and can be hardened. Both are formed into flat square hex shapes for easy fitting in machinery, construction, and automotive applications.
What are the differences between SS 409 and SS 410?
SS 409 has lower carbon content, is ferritic, and is commonly used in automotive exhaust systems. SS 410 has higher carbon and chromium content, is martensitic, and can be heat treated for higher strength, making it suitable for cutlery, valves, and industrial equipment.
What are the common applications of SS 409/410 Flat Square Hex?
These materials are widely used in automotive components, heat exchangers, industrial machinery, pumps, valves, and aerospace applications, depending on the grade and mechanical requirements.
What sizes are available for SS 409/410 Flat Square Hex?
Sizes typically range from 10 mm to 50 mm across flats with standard lengths from 1000 mm to 6000 mm. Custom sizes can also be manufactured on request.
Can SS 410 be hardened?
Yes, SS 410 is martensitic and can be heat treated to increase hardness and tensile strength. SS 409 is ferritic and cannot be hardened by heat treatment.
How resistant are SS 409/410 to corrosion?
SS 409 offers moderate corrosion resistance, especially in exhaust systems. SS 410 has better corrosion resistance than mild steel but is less resistant than austenitic grades like SS 304.
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