420 Stainless Steel Hex Bar
High-strength 420 stainless steel hex bars from Stellanox Steel are perfect for uses that call for superior hardness, resistance to wear, and edge retention. For surgical instruments, cutlery, fasteners and machine parts used in high-abrasion settings, this martensitic stainless steel hex bar is ideal because it can be heat treated to obtain high mechanical strength.
For precision-engineered components, 420 hex bars are the material of choice due to their robust mechanical performance and polishable surface.
What is 420 Stainless Steel Hex Bar?
The six-sided 420 Stainless Steel Hex Bar is composed of high-carbon martensitic stainless steel that contains 12–14% chromium. It has a high tensile strength, polishability, mild corrosion resistance, and can be hardened by heat treatment.
420 hex bars are frequently used in mechanical components like tools, dies, and medical equipment that need to have sharp edges, strict tolerances, and impact resistance.
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Stainless Steel |
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Carbon Steel |
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Duplex Stainless Steel |
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Super Duplex Stainless Steel |
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Alloy Steel |
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Titanium |
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Hastelloy |
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Inconel |
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Monel |
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Aluminium |
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Copper |
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Pure Nickel |
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Flanges |
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Forged Fittings |
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Valves |
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Fasteners |
Key Features of 420 Stainless Steel Hex Bar
- High Hardness Potential: After heat treatment, it can reach 50 HRC or more.
Outstanding Wear - Resistance: Perfect for tool components, bearings, and blade edges.
- It is appropriate for dry and mildly corrosive situations due to its moderate corrosion resistance.
- Polishable Surface: Mirror-finishing is possible for both cosmetic and therapeutic uses.
- Both the annealed and hardened states exhibit magnetic properties.
- Good Machinability: Capable of being precisely ground, turned, or cut.
Specification Chart – 420 Stainless Steel Hex Bar
| Property | Details |
|---|---|
| Grade | 420 (UNS S42000) |
| Standards | ASTM A276, ASTM A479, EN 10088-3 |
| Size Range (Across Flats) | 6 mm – 75 mm |
| Length | Up to 6 meters or custom cut |
| Finishes | Bright, Peeled, Polished, Black |
| Conditions | Annealed, Hardened, Tempered |
Chemical Composition – 420 Stainless Steel Hex Bar
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 12.0 – 14.0 |
| Carbon (C) | 0.15 – 0.40 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Mechanical Properties – 420 Stainless Steel Hex Bar (Hardened)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 700 – 1000 |
| Yield Strength (MPa) | ≥ 345 |
| Elongation (%) | ≥ 15 |
| Hardness (HRC) | 50 – 55 (Hardened) |
| Density | 7.75 g/cm³ |
Equivalent Grades – 420 Stainless Steel Hex Bar
| Standard | Grade |
|---|---|
| ASTM | 420 |
| EN | 1.4021 |
| JIS | SUS 420J1 / 420J2 |
| UNS | S42000 |
| DIN | X20Cr13 |
Applications of 420 Stainless Steel Hex Bar
- Surgical and Medical Instruments
- Knife and Scissor Blades
- Tool and Die Manufacturing
- Fasteners and Screws
- Cutlery and Decorative Components
- Bearing Sleeves and Shafts
Benefits of 420 Stainless Steel Hex Bar
- High hardness and wear resistance after heat treatment
- Fully magnetic in all conditions
- Easily polished for medical and precision tools
- Moderate corrosion protection for indoor or dry use
- Long-lasting performance in dynamic or high-friction settings
- Reliable choice for blade-grade and structural applications
2025 Stellanox Steel |