420 Stainless Steel Round Bar
Stellanox Steel supplies high-quality 420 Stainless Steel Round Bars, designed for applications requiring high hardness, polishability, and excellent wear resistance. As a martensitic stainless steel, 420 round bars can be hardened through heat treatment, making them ideal for surgical tools, industrial blades, valves, and mechanical components where cutting performance and durability are critical.
With excellent surface finish capability and strength, 420 bars are widely used in automotive, medical, and tooling industries.
What is 420 Stainless Steel Round Bar?
420 Stainless Steel Round Bar is a high-carbon martensitic stainless steel alloy that offers excellent hardness and edge retention after heat treatment. Containing 12–14% chromium, it provides moderate corrosion resistance and is often used in applications involving cutting, grinding, or abrasion.
420 bars are easily ground and polished to a mirror-like finish, making them suitable for tools and instruments where a clean surface and sharp edge are required.
| Products |
|---|
|
Stainless Steel |
|
Carbon Steel |
|
Duplex Stainless Steel |
|
Super Duplex Stainless Steel |
|
Alloy Steel |
|
Titanium |
|
Hastelloy |
|
Inconel |
|
Monel |
|
Aluminium |
|
Copper |
|
Pure Nickel |
|
Flanges |
|
Forged Fittings |
|
Valves |
|
Fasteners |
Key Features of 420 Stainless Steel Round Bar
- High Hardness: Can achieve Rockwell hardness of 50 HRC or higher after hardening.
- Excellent Wear Resistance: Ideal for tooling and cutting applications.
- Good Surface Polishability: Used for surgical and mirror-finished components.
- Moderate Corrosion Resistance: Performs in mild atmospheric and water-based environments.
- Magnetic in All Conditions: Retains magnetic properties when annealed or hardened.
- Machinable and Grindable: Easily processed for high-precision use.
Specification Chart – 420 Stainless Steel Round Bar
| Property | Details |
|---|---|
| Grade | 420 (UNS S42000) |
| Standards | ASTM A276, ASTM A479, EN 10088-3 |
| Diameter Range | 6 mm to 200 mm |
| Length | Up to 6 meters or cut to length |
| Finishes | Bright, Peeled, Polished, Black |
| Conditions | Annealed, Hardened, Tempered |
Chemical Composition – 420 Stainless Steel Round 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 Round 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 Round Bar
| Standard | Grade |
|---|---|
| ASTM | 420 |
| EN | 1.4021 |
| JIS | SUS 420J1 / J2 |
| UNS | S42000 |
| DIN | X20Cr13 |
Applications of 420 Stainless Steel Round Bar
- Surgical and Dental Instruments
- Cutlery and Knife Blades
- Pump Shafts and Valve Parts
- Bearing Components
- Molds and Dies for Plastics
- Mechanical Fasteners and Screws
Benefits of 420 Stainless Steel Round Bar
- Achieves high hardness and strength after heat treatment
- Excellent polishability for surgical and decorative use
- Wear-resistant for cutting and mechanical applications
- Fully magnetic and easy to grind and machine
- Reliable performance in dry and mildly corrosive environments
- Ideal for tools requiring edge retention and impact resistance
2025 Stellanox Steel |