What is ASTM 201 stainless steel?
1.4372 stainless steel, also known as ASTM 201 or UNS S20100, is an austenitic chromium–manganese–nickel stainless steel designed as a low-nickel alternative to 304 stainless steel. By partially replacing nickel with manganese and nitrogen, 201 stainless steel maintains good strength and corrosion resistance while reducing cost-making it popular in architectural, transportation, catering, and household applications.
Chemical Composition (% by mass)
| Element | Typical Range |
|---|---|
| Carbon (C) | ≤ 0.15 |
| Manganese (Mn) | 5.5 – 7.5 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.060 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 3.5 – 5.5 |
| Nitrogen (N) | 0.05 – 0.25 |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed Condition)
| Property | Value (Typical) |
|---|---|
| Density | 7.8 g/cm³ |
| Tensile Strength (Rm) | 680 – 880 MPa |
| Yield Strength (Rp0.2) | ≥ 275 – 350 MPa |
| Elongation (A%) | ≥ 40 – 45% |
| Hardness (Brinell, HB) | ≤ 241 |
| Modulus of Elasticity | 193 GPa |
| Melting Range | 1400 – 1450 °C |
Is 201 stainless steel magnetic?
In the annealed state, 201 stainless steel is generally non-magnetic but may become slightly magnetic after cold working.
How does 201 compare to 304 stainless steel?
201 has lower nickel content, making it cheaper but slightly less corrosion-resistant than 304. Suitable for indoor or mild outdoor use, but not for marine environments.
Can 201 stainless steel be used for food contact?
Yes, in many regions 201 meets food-grade requirements, but its corrosion resistance is lower than 304, so it's best for dry or low-chloride food processing.
What industries use 201 stainless steel most?
Kitchen utensils, cookware, railway cars, decorative panels, appliances, and architectural trim.
What is the lifespan of 201 stainless steel in outdoor environments?
In mild urban conditions, it can last many years without significant corrosion, but in coastal or industrial atmospheres, surface rust may appear without proper maintenance.
Procurement Advice
When purchasing 1.4372 / ASTM 201 stainless steel: Verify compliance with ASTM A240 or EN 10088-2. Specify the surface finish (2B, BA, No. 4, mirror) based on the application. Consider passivation for improved corrosion resistance. Request an MTR (Material Test Report) to verify chemical and mechanical properties.
Why Choose Us
We provide high-quality 1.4372 / ASTM 201 / UNS S20100 stainless steel sheets, coils, and plates, meeting international standards with competitive prices and reliable delivery.Contact us today for an instant quotation and expert technical support.es@gescosteel.com
