Womic Stainless Steel Co., Ltd
Good Corrosion Resistance: Excellent resistance to oxidation and corrosion in fresh water, mild chemical media, and atmospheric conditions. The 304L grade provides additional protection against intergranular corrosion after welding.
Excellent Formability: 304/304L stainless steel offers superior forming characteristics, making it ideal for bending, punching, drilling, and cutting operations.
Good Mechanical Strength: Good tensile and yield strength combined with excellent ductility for load-bearing structural applications.
Excellent Weldability: 304L grade ensures low carbon content for superior weld performance and easy fabrication, with reduced risk of intergranular corrosion.
Cost-Effective Solution: Lower alloy content (no molybdenum) compared to 316/316L makes 304/304L a more economical choice for applications where chloride-induced pitting is not a concern.
Surface Quality: Smooth surface finish available in mill finish, pickled, polished, or brushed for architectural and sanitary applications.
Aesthetic Appearance: Bright silver finish provides excellent visual appeal for exposed structural elements.
International Certifications: Structural angles can be certified by ABS, BV, DNV, LR, GL, RINA, CCS, KR, and NK, and comply with NORSOK and ASME standards.
|
Standard |
Description |
Corresponding 304/304L Grade |
|
ASTM A276 / A479 |
Standard specification for stainless steel bars and shapes |
304 / 304L |
|
ASTM A484 |
General requirements for stainless steel bars and shapes |
304 / 304L |
|
EN 10088-2 / EN 10088-4 |
European standard for stainless steel structural sections |
1.4301 / 1.4307 |
|
JIS G4303 |
Japanese standard for stainless steel bars and shapes |
SUS304 / SUS304L |
|
GB/T 4226 |
Chinese standard for stainless steel cold-formed sections |
06Cr19Ni10 / 022Cr19Ni10 |
|
ISO 2766 |
International standard for stainless steel sections |
X5CrNi18-10 / X2CrNi18-9 |
|
ASME B36.19 |
Stainless steel pipe (reference for structural applications) |
304 / 304L |
|
NORSOK M-630 |
Offshore material standard (limited application) |
304 / 304L |
These standards ensure that our 304/304L stainless steel equal angles meet global requirements for chemical composition, mechanical performance, dimensional tolerances, and testing methods.
|
Element |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
304 Equal Angles |
≤0.08 |
≤2.00 |
≤0.045 |
≤0.030 |
≤1.00 |
18.0–20.0 |
8.0–11.0 |
|
304L Equal Angles |
≤0.03 |
≤2.00 |
≤0.045 |
≤0.030 |
≤1.00 |
18.0–20.0 |
8.0–12.0 |
The lower carbon content in 304L minimizes carbide precipitation during welding, providing enhanced resistance to intergranular corrosion compared to standard 304, especially in welded service environments.
|
Property |
Unit |
304 |
304L |
|
Tensile Strength |
MPa |
≥515 |
≥485 |
|
Yield Strength (0.2% offset) |
MPa |
≥205 |
≥170 |
|
Elongation |
% |
≥40 |
≥40 |
|
Hardness (Brinell) |
HBW |
≤201 |
≤201 |
|
Modulus of Elasticity |
GPa |
193 |
193 |
|
Density |
g/cm³ |
7.93 |
7.93 |
|
Melting Range |
°C |
1400–1450 |
1400–1450 |
|
Thermal Conductivity (100°C) |
W/m·K |
16.2 |
16.2 |
|
Coefficient of Thermal Expansion (20–100°C) |
μm/m·K |
17.2 |
17.2 |
Heat
Treatment Condition:
Both 304 and 304L stainless steel equal angles are normally supplied in
the annealed and pickled condition.
Solution annealing at 1010–1080°C followed by rapid cooling restores full
corrosion resistance, relieves internal stresses, and enhances ductility.
Delivery
Condition:
Angles are normally supplied in annealed and pickled condition, providing a clean,
smooth surface and good corrosion resistance. Upon request, bright annealed, polished, or brushed finishes can be
provided to meet specific architectural, sanitary, or aesthetic requirements.
|
Leg Length (A x B) |
Thickness (t) |
Weight (kg/m) – 304 |
Section Modulus (cm³) |
Moment of Inertia (cm⁴) |
|
20 x 20 mm |
3 mm |
0.89 |
0.8 |
1.1 |
|
25 x 25 mm |
3 mm |
1.12 |
1.5 |
2.2 |
|
25 x 25 mm |
4 mm |
1.45 |
1.9 |
2.8 |
|
30 x 30 mm |
3 mm |
1.36 |
2.1 |
3.5 |
|
30 x 30 mm |
4 mm |
1.78 |
2.8 |
4.6 |
|
40 x 40 mm |
3 mm |
1.83 |
3.5 |
7.2 |
|
40 x 40 mm |
4 mm |
2.40 |
4.6 |
9.4 |
|
40 x 40 mm |
5 mm |
2.95 |
5.6 |
11.3 |
|
50 x 50 mm |
4 mm |
3.04 |
7.1 |
18.0 |
|
50 x 50 mm |
5 mm |
3.75 |
8.7 |
21.9 |
|
50 x 50 mm |
6 mm |
4.50 |
10.2 |
25.6 |
|
60 x 60 mm |
5 mm |
4.54 |
13.7 |
42.7 |
|
60 x 60 mm |
6 mm |
5.40 |
16.2 |
50.3 |
|
65 x 65 mm |
5 mm |
4.95 |
16.5 |
55.1 |
|
65 x 65 mm |
6 mm |
5.89 |
19.5 |
65.0 |
|
65 x 65 mm |
8 mm |
7.70 |
25.0 |
83.0 |
|
75 x 75 mm |
6 mm |
6.85 |
26.0 |
100.0 |
|
75 x 75 mm |
8 mm |
9.00 |
34.0 |
130.0 |
|
75 x 75 mm |
10 mm |
11.00 |
41.0 |
158.0 |
|
100 x 100 mm |
6 mm |
9.25 |
45.0 |
227.0 |
|
100 x 100 mm |
8 mm |
12.20 |
59.0 |
297.0 |
|
100 x 100 mm |
10 mm |
15.10 |
72.0 |
363.0 |
|
120 x 120 mm |
8 mm |
14.80 |
88.0 |
530.0 |
|
120 x 120 mm |
10 mm |
18.30 |
108.0 |
650.0 |
|
120 x 120 mm |
12 mm |
21.80 |
127.0 |
764.0 |
|
150 x 150 mm |
10 mm |
23.10 |
180.0 |
1350.0 |
|
150 x 150 mm |
12 mm |
27.50 |
213.0 |
1600.0 |
|
150 x 150 mm |
15 mm |
34.00 |
260.0 |
1950.0 |
|
200 x 200 mm |
10 mm |
30.80 |
320.0 |
3230.0 |
|
200 x 200 mm |
12 mm |
37.50 |
380.0 |
3830.0 |
|
200 x 200 mm |
15 mm |
46.20 |
470.0 |
4710.0 |
|
200 x 200 mm |
20 mm |
60.80 |
610.0 |
6140.0 |
Note: Custom sizes, unequal angles, and longer lengths available upon request.
|
Parameter |
Size Range |
Permitted Tolerance |
|
Leg Length (A) |
≤50 mm |
±0.8 mm |
|
Leg Length (A) |
51-100 mm |
±1.2 mm |
|
Leg Length (A) |
101-150 mm |
±1.6 mm |
|
Leg Length (A) |
151-200 mm |
±2.0 mm |
|
Thickness (t) |
≤5 mm |
±0.3 mm |
|
Thickness (t) |
6-10 mm |
±0.5 mm |
|
Thickness (t) |
>10 mm |
±0.8 mm |
|
Squareness (90° angle) |
All sizes |
±1.0° |
|
Straightness |
All sizes |
2 mm per meter |
|
Length |
Standard 6m |
+50 mm / -0 mm |
Raw Material Selection: High-quality 304 and 304L stainless steel billets from certified mills (Baosteel, TISCO, POSCO, Outokumpu).
Heating: Billets heated to a controlled temperature (1100–1200°C) for hot rolling.
Hot Rolling: Billets passed through roughing and finishing stands (continuous rolling mill) to form angle shape.
Cooling: Controlled cooling to prevent distortion and maintain dimensional accuracy.
Straightening: Roller straightening to ensure straightness tolerance within 2 mm per meter.
Solution Annealing (Optional): Heat treatment at 1010–1080°C for optimal corrosion resistance (typically for pickled finish).
Pickling & Passivation: Removal of oxides and creation of passive film for enhanced corrosion protection.
Cutting: Cut to standard 6-meter lengths (or custom lengths per order).
Inspection & Marking: Each bundle inspected, marked with grade, heat number, dimensions, and standard.
|
Surface Type |
Description |
Typical Applications |
|
Annealed & Pickled (AP Finish) |
Bright silver appearance after acid treatment, oxide-free surface. |
Industrial structures, food processing equipment, general fabrication |
|
Mill Finish (MF) |
As-rolled surface with visible scale. |
Non-critical applications, embedded structures |
|
Polished Finish (180#, 240#, 320#, 400#) |
Smooth mechanical finish. |
Architectural railings, decorative frameworks, cleanroom structures |
|
Brushed / Hairline Finish |
Satin linear texture. |
Furniture, interior design, handrails, display stands |
|
Mirror Polished (8K) |
Ultra-reflective surface. |
High-end architectural, sanitary applications, decorative trim |
|
Bright Annealed (BA Finish) |
Mirror-like surface from controlled atmosphere annealing. |
Pharmaceutical equipment, cleanroom structures |
|
Passivated Finish |
Surface chemically treated to enhance corrosion protection. |
Food processing, pharmaceutical, outdoor structures |
|
Electropolished Finish |
Extremely clean, smooth, and hygienic finish. |
Food processing equipment, pharmaceutical vessels |
Chemical Analysis: Spectrometer or PMI verification of alloy elements (Cr, Ni content critical for 304/304L).
Mechanical Testing: Tensile, yield, elongation per ASTM A370.
Dimensional Inspection: Leg length, thickness, squareness, straightness, length.
Surface Inspection: Visual check for surface defects, cracks, scratches, and consistency.
Intergranular Corrosion Test: ASTM A262 Practice E for 304L (upon request).
Positive Material Identification (PMI): Upon customer request.
Third-Party Inspection: SGS, BV, DNV, TUV available upon customer request.
General Industrial Fabrication: Equipment frames, workbenches, machine guards, conveyor supports, storage racks.
Food & Beverage Industry: Processing equipment frames, sanitary piping supports, work platforms, conveyor systems, dairy equipment structures.
Pharmaceutical Cleanrooms: Cleanroom framing, equipment supports, sanitary structures, process line supports, wall framing.
Architectural & Construction: Building frameworks, handrails, balustrades, stair stringers, curtain wall supports, structural glazing, window frames.
Water Treatment Plants: Filter frame supports, tank stiffeners, pipe support structures, walkway framing, access platforms.
HVAC Systems: Equipment frames, duct supports, fan bases, chiller platforms.
Storage & Shelving: Pallet racks, shelving frames, industrial shelving, warehouse racking supports.
Transportation (Limited): Railcar components, trailer interior framing, container fittings.
Power Generation (Auxiliary): Cable tray supports, equipment framing, pipe rack structures.
Interior Design: Furniture frames, display fixtures, retail store fittings, exhibition stands.
Marine (Limited Fresh Water): Fresh water system supports, accommodation framing (certification available for non-seawater marine applications).
Standard Packaging:
Bundles with steel straps and woven fabric wrapping.
Plastic end protection for cut edges.
Wooden pallets or crates for export sea-worthy transport.
Individual bundle labeling with grade, heat number, dimensions, quantity, and standard.
Womic Steel's Shipping Strengths:
Direct cooperation with global shipowners ensures competitive freight rates.
Professional loading and securing teams prevent bending and damage during transit.
Efficient document preparation minimizes customs delays.
Rapid delivery time – standard sizes kept in ready stock over 5,000 tons.
Continuous cargo tracking and after-sales follow-up.
1. What is
the difference between 304 and 304L stainless steel equal angles?
The main difference is carbon content. 304L has lower carbon (≤0.03% vs
≤0.08%), which prevents carbide precipitation during welding and provides
better resistance to intergranular corrosion. For welded structural
applications, 304L is typically preferred.
2. Can 304
stainless steel equal angles be welded?
Yes, both 304 and 304L angles have excellent weldability. However, for
applications requiring post-weld corrosion resistance in the sensitization
temperature range (425-870°C), 304L is recommended.
3. Can
304/304L angles be used in seawater applications?
No. For seawater or high-chloride environments, 316/316L or duplex stainless
steel angles are recommended. 304/304L is not suitable for marine or
high-chloride service.
4. What is
the standard length for stainless steel angles?
Standard length is 6 meters (20 feet). Custom lengths from 1m to 12m available upon
request.
5. What is
the difference between equal angle and unequal angle?
Equal angle has both legs of the same length (e.g., 50x50mm). Unequal angle has
legs of different lengths (e.g., 75x50mm). Both are available from Womic Steel.
6. Do you
provide material test reports (MTR) and certification?
Yes, every shipment includes EN 10204 Type 3.1 MTR with chemical analysis and
mechanical properties. Third-party inspection (SGS, BV, DNV, TUV) available
upon request.
7. Are
your angles suitable for food processing applications?
Yes, with appropriate surface finish (polished, brushed, or electropolished).
304L is widely used in food and dairy processing due to its good corrosion
resistance and cleanability.
Complete Size Range: From 20x20mm to 200x200mm – all standard sizes in stock.
Strict Quality Control: ISO 9001, PED, and marine classification society certified.
Cost-Effective: Most economical stainless steel angle option for general service.
Full Traceability: Heat number on each bundle – traceable to raw material.
Flexible Customization: Special lengths, surface finishes, and non-standard sizes available.
Large Inventory: Over 5,000 tons in stock – ready for immediate dispatch.
Global Delivery: Exported to over 50 countries with reliable logistics support.
Experienced Team: Decades of experience in stainless steel structural sections.
Tel / WhatsApp:
Victor: +86 15575100681
Jack: +86 18390957568
E-mail: info@womicstainless.com
Website: www.womicsteel.com
Contact Womic Steel today for a competitive quote on 304/304L stainless steel equal angles. We offer certified quality, rapid delivery, and reliable global shipping for your fabrication and construction projects.
Stock Examples (304L Equal Angles – 6m length – Annealed & Pickled – General Industrial):
|
Thickness |
Weight |
Application |
|
|
20x20mm |
3mm |
0.89 kg/m |
Light framework, small supports |
|
25x25mm |
3mm |
1.12 kg/m |
Handrails, light frames |
|
30x30mm |
3mm |
1.36 kg/m |
Equipment frames, brackets |
|
40x40mm |
4mm |
2.40 kg/m |
Machine guards, workbenches |
|
50x50mm |
5mm |
3.75 kg/m |
Conveyor supports, racks |
|
65x65mm |
6mm |
5.89 kg/m |
Structural framing, platforms |
|
75x75mm |
6mm |
6.85 kg/m |
Heavy equipment supports |
|
100x100mm |
8mm |
12.20 kg/m |
Building frameworks, columns |
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