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Stainless Steel 202 Flat / Square / Hex Bars are a low-nickel, high-manganese austenitic stainless steel grade designed to offer strength, durability, and moderate corrosion resistance at a more economical price. They are a perfect substitute for 304-grade bars in many non-critical environments, especially where cost efficiency is a priority. The 202 grade contains around 16–18% chromium and 4–6% nickel, providing a strong passive film against oxidation. These bars are extensively used in both industrial and decorative applications due to their high toughness and appealing finish. Their excellent hardness and wear resistance make them ideal for applications requiring both structural and aesthetic strength.
Stainless Steel 202 Flat Bars are widely used in architectural frameworks, railings, brackets, and support beams. The flat shape allows for uniform load distribution, ensuring stability in various construction projects. Their smooth surface finish enhances visual appeal, making them suitable for decorative panels and kitchen equipment. Due to their good formability and weldability, they can be easily bent, cut, or machined to precise dimensions. Additionally, SS 202 flat bars exhibit excellent thermal resistance, allowing them to perform effectively under moderate temperature variations without losing their structural integrity.
Stainless Steel 202 Square Bars are known for their excellent strength-to-weight ratio and uniform geometry, which ensures reliable performance under high mechanical stress. These bars are often utilized in shafts, fasteners, and machine components where precision and stability are essential. Their balanced composition provides adequate corrosion resistance against atmospheric and mild chemical exposure. The square shape makes them easy to machine, polish, and fabricate into various customized forms. Moreover, these bars exhibit good resistance to deformation, making them ideal for engineering applications that demand consistent performance and dimensional accuracy.
Stainless Steel 202 Hex Bars feature six equal sides and are engineered for precision-driven applications such as fasteners, nuts, bolts, and valves. The hexagonal design ensures superior torque strength and easy wrench grip during assembly operations. These bars are particularly valued in mechanical, marine, and automotive industries for their durability and work-hardening capacity. With a smooth finish and tight dimensional tolerance, they provide both aesthetic appeal and functional dependability. The enhanced toughness of SS 202 hex bars makes them resistant to bending and impact, ensuring longevity even under high-stress conditions.
In terms of chemical composition, Stainless Steel 202 contains elements such as chromium (17–19%), nickel (4–6%), manganese (7.5–10%), and nitrogen, which contribute to its mechanical and corrosion-resistant properties. The combination of these elements increases hardness and yield strength while reducing manufacturing costs. However, due to its lower nickel content, the corrosion resistance of SS 202 is lower than that of 304, especially in chloride or acidic environments. Despite this limitation, it performs exceptionally well in general atmospheric and freshwater applications, making it suitable for indoor and semi-outdoor usage.
From a mechanical perspective, SS 202 bars exhibit high tensile strength (around 515 MPa) and yield strength (approximately 275 MPa). They also offer good elongation and hardness, which ensures durability under repeated mechanical stress. The material’s non-magnetic nature in the annealed condition and magnetic behavior after cold working make it flexible for multiple industrial purposes. These properties make 202-grade bars an excellent option for manufacturing furniture, utensils, transportation components, and decorative hardware. The grade’s formability and toughness also make it favorable for deep drawing and forming processes.
In conclusion, Stainless Steel 202 Flat, Square, and Hex Bars are a practical choice for industries seeking a cost-effective yet high-performing stainless steel solution. They offer a perfect balance of strength, appearance, and machinability, making them ideal for diverse uses across construction, automotive, and household sectors. Though not as corrosion-resistant as 304 or 316 grades, their economic benefits and adaptability make them a highly preferred material. With proper maintenance and surface finishing, SS 202 bars deliver long-lasting service life, making them a trusted material for both functional and decorative applications worldwide.
Specification Table
| Property | Flat Bar | Square Bar | Hex Bar |
|---|---|---|---|
| Material Grade | Stainless Steel 202 (SS202) | ||
| Standard | ASTM A276 / ASTM A484 / IS 1367 | ||
| Width / Size Range | 6mm – 200mm | 6mm – 100mm | 8mm – 60mm (across flats) |
| Thickness / Height | 1mm – 25mm | 6mm – 100mm | 8mm – 60mm |
| Length | 1m – 6m (custom cut-to-length available) | ||
| Finish | Hot rolled, cold rolled, mill finish, or polished | ||
| Density | 7.93 g/cm³ | ||
| Ultimate Tensile Strength | ≥ 520 MPa | ||
| Yield Strength | ≥ 310 MPa | ||
| Elongation | ≥ 35% | ||
| Corrosion Resistance | Good resistance to atmospheric corrosion, moisture, and mild chemicals | ||
| Applications | Structural supports, frames, brackets, trims | Machining, fabrication, handrails, supports | Fasteners, bolts, nuts, decorative hardware |
Chemical Composition (Typical ranges for SS202)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.15 |
| Manganese (Mn) | 7.50 – 10.00 |
| Silicon (Si) | ≤ 1.00 |
| Chromium (Cr) | 17.00 – 19.00 |
| Nickel (Ni) | 3.50 – 5.50 |
| Phosphorus (P) | ≤ 0.06 |
| Sulfur (S) | ≤ 0.03 |
| Nitrogen (N) | 0.10 – 0.20 |
| Iron (Fe) | Balance |
Mechanical Properties (Typical)
| Property | Flat Bar | Square Bar | Hex Bar |
|---|---|---|---|
| Tensile Strength (MPa) | 520 – 720 | 520 – 720 | 520 – 720 |
| Yield Strength (MPa) | 310 – 450 | 310 – 450 | 310 – 450 |
| Elongation (%) | 35 – 40 | 35 – 40 | 35 – 40 |
| Hardness (Brinell, HB) | 150 – 200 | 150 – 200 | 150 – 200 |
| Modulus of Elasticity (GPa) | 193 | 193 | 193 |
| Poisson’s Ratio | 0.27 – 0.30 | 0.27 – 0.30 | 0.27 – 0.30 |
| Density (g/cm³) | 7.93 | 7.93 | 7.93 |
| Corrosion Resistance | Good resistance to atmospheric corrosion, moisture, and mild chemicals | ||
| Typical Applications | Structural supports, frames, trims | Machining, fabrication, handrails | Fasteners, bolts, nuts, decorative hardware |
Equivalent Grades
| Standard | Grade / Equivalent |
|---|---|
| ASTM / ASME | SS202 |
| ISO | X2CrNi18-9 / 1.4378 |
| EN | 202 S15 |
| DIN | 1.4378 |
| JIS | SUH409L (approximate) |
| British Standard (BS) | 202S15 |
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.
| Shape | Size / Dimensions (mm) | Approx. Weight (kg/m) |
|---|---|---|
| Flat Bar | 10 x 3 | 0.236 |
| 20 x 5 | 0.786 | |
| 25 x 6 | 1.179 | |
| 50 x 10 | 3.965 | |
| 100 x 20 | 15.86 | |
| Square Bar | 6 x 6 | 0.284 |
| 10 x 10 | 0.785 | |
| 20 x 20 | 3.14 | |
| 40 x 40 | 12.57 | |
| 100 x 100 | 78.5 | |
| Hex Bar | 8 mm (across flats) | 0.429 |
| 10 mm | 0.670 | |
| 20 mm | 2.68 | |
| 30 mm | 6.03 | |
| 50 mm | 16.74 |
Types Of Stainless Steel 202 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 202 (SS202)?
SS202 is an austenitic stainless steel grade with low nickel content and high manganese. It is a cost-effective alternative to SS304 with good corrosion resistance, durability, and strength.
What forms are available for SS202?
SS202 is available in flat bars, square bars, and hex bars. Each form serves different applications: flat bars for structural supports, square bars for fabrication, and hex bars for fasteners and decorative purposes.
What are the typical applications of SS202?
SS202 bars are widely used in industrial, architectural, and decorative applications. Flat bars are used for frames and trims, square bars for machining and supports, and hex bars for bolts, nuts, and hardware fittings.
What are the standard sizes and dimensions?
Flat bars range from 6mm to 200mm in width, square bars from 6mm to 100mm, and hex bars from 8mm to 60mm across flats. Custom cut-to-length options are also available.
What is the chemical composition of SS202?
SS202 contains 17–19% chromium, 3.5–5.5% nickel, 7.5–10% manganese, ≤0.15% carbon, ≤1% silicon, ≤0.06% phosphorus, ≤0.03% sulfur, and balance iron.
What mechanical properties does SS202 have?
SS202 has a tensile strength of 520–720 MPa, yield strength of 310–450 MPa, elongation of 35–40%, hardness of 150–200 HB, and a density of 7.93 g/cm³.
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