What is a 201 stainless steel angle bar?
Feb 09, 2026
Leave a message
What is a 201 stainless steel angle bar?
201 stainless steel angle bar is an L-shaped structural profile made from Grade 201 austenitic stainless steel. It is primarily used as a cost-effective alternative to Grade 304 for indoor and mild structural applications where high corrosion resistance is not critical.
Specifications for 201 Stainless Steel Angle Bars
| Item | Specification |
| Material Grade | 201 (UNS S20100 / EN 1.4372) |
| Standard | ASTM A276 (Standard Specification for Bars) |
| Tolerance Standard | ASTM A484 / ASTM A484M |
| Angle Type | Equal Angle (Standard) / Unequal Angle |
| Surface Finish | HRAP (Hot Rolled Annealed & Pickled), Polished, or Sandblasted |
| Length | 6 meters (20ft) standard, or customized cut-to-length |
| Type | Size Range (mm) | Thickness (mm) | Length (m) |
|---|---|---|---|
| Equal Angle | 20 × 20 to 200 × 200 | 3.0 - 20.0 | 6.0, 9.0, 12.0 (Customizable) |
| Unequal Angle | 25 × 16 to 200 × 125 | 3.0 - 18.0 | Standard 6.0m |
Chemical Composition (%)
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Chromium (Cr) | Nickel (Ni) | Nitrogen (N) |
| Value | ≤ 0.15 | 5.50 - 7.50 | ≤ 0.060 | ≤ 0.030 | ≤ 1.00 | 16.0 - 18.0 | 3.50 - 5.50 | ≤ 0.25 |
Mechanical Properties
| Property | Value (Metric) | Value (Imperial) |
| Tensile Strength (Rm) | ≥ 515 MPa | 75,000 psi |
| Yield Strength (Rp 0.2) | ≥ 260 MPa | 38,000 psi |
| Elongation (A50mm) | ≥ 40% | 40% |
| Hardness (Brinell) | ≤ 218 HBW | - |
| Hardness (Rockwell B) | ≤ 95 HRB | - |
Common Sizes and Weights (Equal Angle)
| Size (mm) | Thickness (mm) | Theoretical Weight ( kg/m ) |
| 20 x 20 | 3 | 0.88 |
| 25 x 25 | 3 | 1.12 |
| 30 x 30 | 3 | 1.36 |
| 40 x 40 | 4 | 2.42 |
| 50 x 50 | 5 | 3.73 |
| 65 x 65 | 6 | 5.91 |
| 75 x 75 | 6 | 6.85 |
| 100 x 100 | 10 | 15.10 |
Dimensional Tolerances (Per ASTM A484)
| Feature | Dimension Range | Tolerance |
| Leg Length | ≤ 50 mm | ± 1.20 mm |
| > 50 mm to 75 mm | ± 1.60 mm | |
| > 75 mm to 100 mm | ± 2.40 mm | |
| Thickness | ≤ 5 mm | ± 0.30 mm |
| > 5 mm | ± 0.50 mm | |
| Straightness | All Sizes | 1.50 mm - 3.00 mm per 1.5 meters |
Comparison: 201 vs. 304 Angle Bar
| Feature | Grade 201 Angle | Grade 304 Angle |
| Cost | Lower (20–30% cheaper) | Higher |
| Corrosion Resistance | Moderate (Indoor/Mild) | Good (Outdoor/Industrial) |
| Strength | Higher Yield Strength | Standard |
| Formability | Good (Work hardens fast) | Excellent |
| Best Use | Indoor decor, dry structures | Outdoor, food grade, marine |
201 stainless steel angle Applications
Due to its high strength and competitive pricing, 201 stainless steel angle bar is widely utilized across various sectors:
Building Construction: Support frames, roof structures, and window/door reinforcement.
Storage Systems: Heavy-duty industrial shelving, warehouse racks, and display stands.
Furniture Manufacturing: Brackets for tables, cabinets, and modern architectural hardware.
Transportation: Light structural components for truck trailers and rail cars where weight-to-strength ratios are vital.
FAQ
Q: Can 201 stainless steel angle bar be welded easily?
A: Yes, it can be welded using all standard fusion methods. However, due to its chemistry, it may be prone to intergranular corrosion in the heat-affected zone if exposed to harsh environments post-welding.
Q: Does 201 stainless steel rust over time?
A: In dry indoor conditions, it remains stable. In outdoor or humid environments, surface tea-staining or oxidation may occur. Applying a protective coating or regular cleaning can mitigate this.
Q: Is it possible to bend 201 angle bars without cracking?
A: 201 has excellent ductility. It can be bent and formed efficiently, although its high work-hardening rate means more force is required compared to 304.
Send Inquiry