GNEE Stainless Steel offers a comprehensive range of stainless steel profiles, complying with international standards such as ASTM, AISI, EN, JIS, and DIN. These products are designed to meet the diverse requirements of sectors including construction, industrial manufacturing, marine engineering, energy projects, and architectural decoration.
By Product Type: Stainless Steel Angle Bars, Channel Bars, Flat Bars, I Beams, H Beams, T Bars, U Profiles, Square Bars, Round Bars, and Custom Stainless Steel Sections.
By Material Grade:
Austenitic Stainless Steel: 304, 304L, 316, 316L, 310S, 321, 347H, etc.
Ferritic/Martensitic Stainless Steel: 410, 420, 430, 440, etc.
Duplex Stainless Steel: 2205, 2507, S31803, S32205.
Super Stainless Steel & Nickel Alloys: 904L, 254SMO, Hastelloy, Inconel, Monel, etc.
By Surface Finish: Pickled, Bright Annealed (BA), Brushed, Polished, Mirror Finished, Sandblasted, and Customized Surface Treatments.
Special Forms: Custom Structural Profiles, Non-Standard Stainless Steel Sections, Heavy-Duty Industrial Profiles, Marine-Grade Profiles, Precision-Cut Components, and Fabricated Stainless Steel Parts.
ASTM A276 201 stainless steel flat bar
ASTM A276 304 stainless steel angle
ASTM A276 316L stainless steel angle bar
304 316 stainless steel H Beams
304 316 stainless steel U Profiles
304 316 stainless steel round bar
The following are the equivalent grades of our stainless steel Profiles.
| Series |
ASTM/AISI Grade |
UNS Code |
EN/DIN Standard |
JIS Grade |
| Austenitic |
304 |
S30400 |
1.4301 |
SUS304 |
| |
304L |
S30403 |
1.4307 |
SUS304L |
| |
316 |
S31600 |
1.4401 |
SUS316 |
| |
316L |
S31603 |
1.4404 |
SUS316L |
| |
321 |
S32100 |
1.4541 |
SUS321 |
| |
310S |
S31008 |
1.4845 |
SUS310S |
| Ferritic |
430 |
S43000 |
1.4016 |
SUS430 |
| |
409L |
S40903 |
1.4512 |
SUS409L |
| Martensitic |
410 |
S41000 |
1.4006 |
SUS410 |
| |
420 |
S42000 |
1.4021 |
SUS420 |
| Duplex |
2205 |
S32205 |
1.4462 |
SUS32205 |
| |
2507 |
S32750 |
1.4410 |
SUS32750 |
| Super Alloy |
904L |
N08904 |
1.4539 |
SUS890L |
Stainless Steel Profile Production Process
The stainless steel profile production process converts raw materials into durable, complex structural shapes. It involves melting and refining scrap and alloys into billets, followed by shaping through hot extrusion, hot rolling, or laser welding. Finally, the profiles undergo heat treatment, descaling, straightening, and surface passivation to maximize corrosion resistance.
ASTM A276 Standard Specification forStainless Steel Bars and Shapes
Chemical Requirements (Weight %)
| Grade |
UNS |
C (Max) |
Mn (Max) |
P (Max) |
S (Max) |
Si (Max) |
Cr (Range) |
Ni (Range) |
Mo (Range) |
| 304 |
S30400 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0 - 20.0 |
8.0 - 11.0 |
— |
| 304L |
S30403 |
0.030 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0 - 20.0 |
8.0 - 12.0 |
— |
| 316 |
S31600 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0 - 18.0 |
10.0 - 14.0 |
2.0 - 3.0 |
| 316L |
S31603 |
0.030 |
2.00 |
0.045 |
0.030 |
1.00 |
16.0 - 18.0 |
10.0 - 14.0 |
2.0 - 3.0 |
| 321 |
S32100 |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
17.0 - 19.0 |
9.0 - 12.0 |
Ti: 5x(C+N) min |
| 310S |
S31008 |
0.08 |
2.00 |
0.045 |
0.030 |
1.50 |
24.0 - 26.0 |
19.0 - 22.0 |
— |
| 410 |
S41000 |
0.15 |
1.00 |
0.040 |
0.030 |
1.00 |
11.5 - 13.5 |
— |
— |
| 430 |
S43000 |
0.12 |
1.00 |
0.040 |
0.030 |
1.00 |
16.0 - 18.0 |
— |
— |
Mechanical Property
| Grade (UNS) |
Condition |
Tensile Strength, min. (MPa / ksi) |
Yield Strength, 0.2% offset, min. (MPa / ksi) |
Elongation in 50mm, min. (%) |
Brinell Hardness, max. (HBW) |
| 304 (S30400) |
Annealed |
515 / 75 |
205 / 30 |
40% |
183 |
| 304L (S30403) |
Annealed |
485 / 70 |
170 / 25 |
40% |
183 |
| 316 (S31600) |
Annealed |
515 / 75 |
205 / 30 |
40% |
183 |
| 316L (S31603) |
Annealed |
485 / 70 |
170 / 25 |
40% |
183 |
| 321 (S32100) |
Annealed |
515 / 75 |
205 / 30 |
40% |
183 |
| 310S (S31008) |
Annealed |
515 / 75 |
205 / 30 |
40% |
183 |
| 410 (S41000) |
Annealed |
485 / 70 |
275 / 40 |
20% |
223 |
| 430 (S43000) |
Annealed |
450 / 65 |
205 / 30 |
20% |
183 |
Material Conditions (Heat Treatment)
Explaining these conditions shows the customer you understand the metallurgy behind the profiles.
| Condition |
Description |
Technical Benefit |
| Condition A |
Annealed (Solution Treated) |
Maximum corrosion resistance and ductility. |
| Condition H |
Hardened and Tempered |
High strength and wear resistance for mechanical parts. |
| Condition T |
Intermediate Temper |
Balanced strength and toughness for structural loads. |
| Condition B |
Cold Worked |
Higher tensile strength and tighter dimensional accuracy. |
If you have any questions regarding the above, please feel free to contact us promptly or download the latest ASTM A276 PDF technical guide!
ASTM A276 PDF
ASTM A484 Dimensional Tolerances
As a professional manufacturer, we strictly adhere to ASTM A484/A484M standards to ensure every profile meets the most rigorous dimensional accuracy requirements for structural and industrial applications.
Table 1: Permissible Variations for Hot-Rolled Channels, Angles, and Tees
| Specified Size (Width or Depth) (mm) |
Size Tolerance (Over/Under) (mm) |
Thickness Tolerance (mm) |
| To 25.4 (1") |
± 1.2 mm |
± 0.25 mm |
| 25.4 to 50.8 (1" to 2") |
± 1.6 mm |
± 0.38 mm |
| 50.8 to 76.2 (2" to 3") |
± 2.4 mm |
± 0.45 mm |
| 76.2 to 101.6 (3" to 4") |
± 3.2 mm |
± 0.50 mm |
| 101.6 to 152.4 (4" to 6") |
+ 4.8 mm / - 3.2 mm |
± 0.60 mm |
| Over 152.4 (6") |
+ 6.4 mm / - 4.8 mm |
± 0.80 mm |
Table 2: Permissible Variations for Hot-Finished Flat Bars
| Specified Width (mm) |
Width Tolerance (mm) |
Thickness Range (mm) |
Thickness Tolerance (mm) |
| 25 to 50 |
± 0.8 mm |
Up to 13 |
± 0.25 mm |
| 50 to 100 |
± 1.2 mm |
13 to 25 |
± 0.38 mm |
| 100 to 150 |
± 1.6 mm |
25 to 50 |
± 0.50 mm |
| Over 150 |
± 2.4 mm |
Over 50 |
± 0.80 mm |
Table 3: Straightness Tolerances
| Product Form |
Measurement Method |
Permissible Variation |
| Hot Finished Bars |
Any 1.5 meters (5 ft) |
Max 3.2 mm (1/8 in.) |
| Machine Straightened |
Total Length (L) |
3.2 mm x (Total Length / 1.5m) |
| Cold Finished Bars |
Any 1.5 meters (5 ft) |
Max 1.6 mm (1/16 in.) |
This specification covers the general requirements applicable to the following types of materials: rolled stainless steel bars, shapes, and forgings, as well as billets or other semi-finished products intended for forging (excluding wire); all such materials shall comply with the requirements of the latest revisions of the following ASTM specifications: A276, A314, A458, A473, A477, and A479/A479M.
To access the referenced ASTM A484 standard, you may click below to download it, or contact the GNEE Stainless Technical Department at sales@gneestainless.com.
ASTM A484 PDF
Project Name: Southeast Asia Port Crane Structural Reinforcement
Year: 2021
Country: Singapore
Products: 316L Hot-Rolled Channels, 316L Equal Angle Steel
Application: Used for crane rail supports and structural components in a salt-spray environment.
Quantity: 55 Tons
Project Name: Outback Mining Acid Water Treatment Facility
Year: 2021
Country: Australia
Products: 316 Pickled Channels, 316 Wide Flat Bars
Application: Beam framework for the sedimentation tank within the mine wastewater treatment facility.
Quantity: 85 Tons
Project Name: Valley Winery Storage Expansion Project
Year: 2022
Country: Chile
Products: 304L Hot-Rolled I-Beams, 304L Angle Steel
Application: Load-bearing bases for large fermentation tanks and staircase railing structures.
Quantity: 42 Tons
Project Name: Offshore Platform Living Quarters
Year: 2022
Country: Nigeria
Products: 316L Heavy-Duty H-Beams, Thick Flat Steel
Application: Corrosion-resistant and fire-resistant partition framing for the offshore platform's living quarters.
Quantity: 150 Tons
Project Name: Floating Photovoltaic Power Station Project
Year: 2023
Country: Thailand
Products: 304 Stainless Steel C-Channels, Hexagonal Steel Bars
Application: Moisture-resistant connecting components for floating photovoltaic panels
Quantity: 210 tons
Project Name: Oilseed Processing Expansion Project
Year: 2023
Country: Brazil
Products: 304L Hot-Rolled I-Beams, Channel Steel, Angle Steel
Application: Support bases for large-scale vibrating screens in the pressing workshop.
Quantity: 95 Tons
304, 316, and 2205 Stainless Steel Factory
Our production facility is equipped with AOD refining furnaces, LF refining furnaces, medium-frequency induction furnaces, continuous hot-rolling lines, precision cold-drawing machines, centerless grinders, peeling machines, automated straightening systems, and CNC cutting lines.
We offer round bars, square bars, hexagonal bars, and various custom-shaped profiles, covering a wide range of grades including 304/304L, 316/316L, 310S, 321, 17-4PH, and 2205 duplex stainless steel. Prior to shipment, every batch of products undergoes rigorous inspection, including PMI material composition analysis, ultrasonic flaw detection, and mechanical property testing. Our products fully comply with international standards such as ASTM A276, ASTM A479, DIN, and JIS, and are manufactured under an ISO 9001 certified quality management system.
To fully support our customers' project schedules, we maintain a year-round stock of commonly used grades and specifications—including 304 and 316L stainless steel round bars. Standard products can typically be shipped within 3 to 5 days of order confirmation, while custom-specified products are generally produced and delivered within 15 to 25 working days.
304, 316, and 2205 Stainless Steel Factory
304, 316 Stainless Steel Factory
Quality Testing and Control
We utilize handheld spectrometers to conduct 100% material verification on every outgoing shipment, ensuring that no incorrect goods are dispatched. We frequently collaborate with agencies such as SGS, BV, and Intertek to oversee loading operations and conduct sampling inspections. Furthermore, every shipment is accompanied by a Mill Test Certificate (MTC) compliant with the EN 10204 3.1 standard, documenting the chemical composition and mechanical properties of the materials.
Stainless Steel Profile Packaging
The packaging method for stainless steel profiles (such as angle steel, channel steel, I-beams, flat bars, square bars, etc.) directly impacts the surface protection of the product, its resistance to moisture, and the efficiency of loading and unloading operations.
1. Standard Industrial Bundling
Strapping: Multiple high-strength steel straps are applied to secure the bundle (typically spaced every 1.5 to 2 meters).
Protective Layer: Cardboard inserts or plastic edge protectors are placed beneath the straps to prevent the steel bands from damaging the edges of the profiles.
Outer Wrapping: The entire bundle is encased in a woven bag (typically green or white) or waterproof kraft paper to protect against rain and dust during transit.
Lifting Provisions: Nylon lifting slings are pre-positioned at the strapping points to facilitate handling by forklifts or cranes at docks and warehouses.
2. Wooden Case/Crate Packaging
Casing: The profiles are packed in fumigated wooden crates (compliant with ISPM 15 standards) or in fumigation-free plywood crates.
Inner Lining: The interior of the crate is lined with a waterproof film or VCI (Volatile Corrosion Inhibitor) anti-rust paper.
Securing: Internal wooden brackets or support bars are installed within the crate to prevent the profiles from shifting or vibrating, thereby avoiding deformation caused by impact during transit.
Stainless Steel Profile Processing Services
Stainless steel sections can be supplied as mill products or processed according to project requirements:
Cut-to-length processing
CNC drilling
Laser cutting
Welding fabrication
Surface polishing
Shot blasting
These services reduce fabrication time and improve installation efficiency.
FAQ
Q: What are the most commonly used grades for stainless steel profiles?
A: The most commonly used grades are austenitic stainless steels (304/304L, 316/316L). Additionally, for specialized environments, we also offer duplex stainless steels (2205/2507), high-temperature resistant series (310S/321), and free-machining series (303).
Q: For coastal construction projects, should one choose 304 or 316 profiles?
A: We strongly recommend choosing 316/316L. Grade 316 contains molybdenum (Mo), which provides superior resistance to chloride-induced corrosion and effectively prevents the "tea-staining" rust spots often caused by sea breezes.
Q: What are Duplex stainless steel profiles, and what are their advantages?
A: Duplex stainless steel (such as 2205) combines the characteristics of both austenitic and ferritic stainless steels. Its key advantage is a tensile strength that is approximately double that of standard 304/316 grades, along with excellent resistance to stress corrosion cracking. It is frequently used in chemical processing and heavy-load-bearing structural applications.
Q: What is the difference between Hot Rolled and Cold Drawn profiles?
A: Hot rolled profiles are lower in cost and suitable for large structural components; their surface finish is typically a pickled finish (No.1). Cold drawn profiles offer higher dimensional precision (e.g., h9–h11 tolerances) and a smoother surface finish, making them ideal for use in precision mechanical parts.
Q: What are Laser Fused stainless steel profiles?
A: This refers to an advanced manufacturing process in which stainless steel plates of varying thicknesses are laser-welded together to form structural shapes, such as I-beams or channel beams. The advantages of this method include sharp, distinct edges (with minimal corner radii) and exceptional dimensional flexibility, allowing for the production of non-standard and custom specifications.
Q: Can profiles be customized into special shapes?
A: Yes. We support the customization of special-shaped profiles (Custom Profiles) based on technical drawings, including asymmetrical angles, T-beams, Omega profiles, and more.
Q: Which international standards do your products comply with?
A: Our products comply with standards such as ASTM A276 and A479 (standards for bars/profiles), ASTM A1069 (laser welding), and the European standard EN 10088, among others.
Q: What is the standard length for stainless steel angles and channels?
A: The standard length is typically 6 meters (20 feet). We also offer "cut-to-length" services, allowing us to customize lengths—such as 5.8 meters—to fit standard shipping containers.
Q: What are the common surface finishes for stainless steel profiles?
A: Pickled/Annealed: The standard finish for industrial applications.
Hairline/Brushed: Commonly used in architectural decoration.
Polished (Grit 180-600): Suitable for food-grade or decorative applications.
Sandblasted: Features a matte texture.
Q: Why do stainless steel profiles require passivation treatment after welding?
A:The high temperatures generated during welding can damage the chromium-rich protective oxide layer on the surface. Passivation treatment removes weld discoloration and regenerates this protective film, thereby enhancing corrosion resistance.
Q: How can rust spots on stainless steel profiles be prevented during storage?
A: The key is to avoid contact with carbon steel (to prevent contamination by iron particles). During storage, wooden pallets should be used to ensure the profiles do not come into direct contact with the ground, and the storage area should be kept dry and well-ventilated.
Q: How many tons of stainless steel profiles can be loaded into a 20-foot container?
A: Due to weight limitations, a standard 20GP container can typically accommodate 25 to 27 tons. If the length of the profiles exceeds 5.8 meters, a 40-foot container is required.
