Hemi Metals, based in Hamilton, New Zealand, is a trusted manufacturer and supplier of Stainless Steel 420 Flat Bars, specifically crafted for applications that demand high hardness, strength, and reliable wear resistance. Renowned for their precision engineering and commitment to quality, the company produces 420 Flat Bars with exact dimensions, a superb surface finish, and consistent metallurgical properties. This martensitic stainless steel grade is perfect for industries that require durable, long-lasting components. Hemi Metals supplies these bars to sectors like tooling, mechanical engineering, automotive, and manufacturing, ensuring that every product meets international standards and performs reliably in tough conditions.
Stainless Steel 420 Flat Bars are made up of 12–14% chromium, low nickel, and a higher carbon content, which allows the alloy to achieve high hardness and tensile strength after heat treatment. As a martensitic stainless steel, it provides good wear resistance, moderate corrosion protection, and excellent edge retention. Its mechanical properties include impressive hardness, high tensile strength, and good fatigue resistance, particularly in quenched and tempered states. While it may be less ductile than austenitic grades, SS 420 maintains dimensional stability and dependable performance, making it a great choice for components that need toughness and durability in challenging environments.
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A276, A479, ASTM A493
Length : Random, Fix & Cut Length
Size : 20MM to 150MM
| Element | C | Cr | Mn | Ni | P | S | Si |
| SS 420 | 0.15 | 14.0 | 1.00 | – | 0.04 | 0.03 | 1.00 |
| Element | Tensile Strength | Yield Strength | Elongation | Hardness |
| SS 420 | 95,000 | 50,000 | 25 | 175 |
| Flat Bar | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.49 | 1.60 |
| 18 | 0.62 | 2.02 |
| 20 | 0.76 | 2.49 |
| 22 | 0.92 | 3.02 |
| 25 | 1.19 | 3.90 |
| 28 | 1.49 | 4.89 |
| 28 | 1.49 | 4.89 |
| 30 | 1.71 | 5.61 |
| 32 | 1.95 | 6.38 |
| 36 | 2.46 | 8.08 |
| 38 | 2.74 | 9.00 |
| 40 | 3.04 | 9.97 |
| 45 | 3.85 | 12.62 |
| 50 | 4.75 | 12.62 |
| 56 | 8.96 | 19.55 |
| 60 | 6.84 | 22.44 |
| 65 | 8.03 | 26.34 |
| 70 | 9.31 | 30.54 |
| 75 | 10.69 | 35.06 |
| 80 | 12.16 | 39.89 |
| 90 | 15.39 | 50.49 |
| 100 | 19 | 62.34 |
Stainless Steel 420 Flat Bar is commonly used in applications requiring high strength, wear resistance, and moderate corrosion resistance. It is often found in the manufacturing of surgical instruments, valves, knives, bearings, shafts, and other precision machinery components.
Stainless Steel 420 typically has a hardness range of 50-55 HRC (Rockwell Hardness). When heat-treated, it can achieve higher hardness levels, making it suitable for applications requiring wear resistance, such as cutlery, tools, and industrial components.
Yes, Stainless Steel 420 Flat Bar can be heat treated to improve strength. Through processes like annealing, hardening, and tempering, its hardness, wear resistance, and overall strength can be enhanced, making it ideal for demanding applications like cutting tools.
Stainless Steel 420 Flat Bars find extensive use in applications that require strong wear resistance, hardness, and durability. They’re commonly utilized for knife blades, cutting tools, dies, surgical instruments, and industrial blades. In the mechanical and automotive industries, these bars are essential for pump shafts, valve components, gears, cams, and precision-machined parts that face repeated stress. Their capacity to be hardened makes them ideal for parts that need sharp edges and resistance to abrasion.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hemi Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Hamilton New Zealand
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