Manufacturer | Supplier | Exporter — Bangalore, India
Product Overview
Bombay Metal Corporation is a trusted manufacturer, stockist, and exporter of Stainless Steel Flats, Angles, and Channels, catering to a wide range of industrial, structural, and fabrication applications across India and international markets.
Our stainless steel structural sections are produced from premium-quality raw material conforming to ASTM, AISI, JIS, and BS standards. Each product undergoes stringent quality checks to ensure dimensional accuracy, surface finish, and mechanical reliability. Available in a broad spectrum of grades — from workhorse grades like 304 and 316 to high-temperature grades like 321 and 309 — we stock the full range so your procurement never stalls.
Stainless Steel Angles are available in Equal Leg and Unequal Leg configurations. Channels come in C-Channel (standard) and U-Channel profiles, while Flats are supplied in mill finish, No.1, 2B, and brush-polished finishes. Custom cutting and processing are available on request.
Key Strengths: Wide grade range | Ready stock | Cut-to-length | Mill test certificates | Fast dispatch
Available Grades
We supply Stainless Steel Flats, Angles, and Channels in the following grades. Each grade is engineered for specific environments and performance requirements.
Grade 303 — Free-Machining Stainless Steel
|
Stainless Steel 303 — At a Glance |
|
|
UNS No. |
S30300 |
|
Key Alloying |
Cr 17–19%, Ni 8–10%, S (added for machinability) |
|
Density |
7.93 g/cm³ |
|
Tensile Strength |
515 MPa (min) |
|
Yield Strength |
205 MPa (min) |
|
Elongation |
40% (min) |
|
Operating Temp. |
Up to 870°C (intermittent) |
|
Standard |
ASTM A276 / AMS 5640 |
Grade 303 is the most machinable of all stainless steels. Sulphur is added to the composition to improve chip-breaking during machining, making it ideal for high-volume CNC production runs. Corrosion resistance is slightly lower than 304 due to the sulphur content, but it remains adequate for mildly corrosive environments.
Applications — 303 Flats, Angles & Channels
- Precision-machined fittings and fastener components
- Gears, nuts, bolts, and shafts manufactured on automatic screw machines
- Valve bodies and bushings
- Food-machinery components where frequent re-machining is needed
Structural support frames in light engineering
Grade 304 / 304L — The Industry Standard
|
Stainless Steel 304 / 304L — At a Glance |
|
|
UNS No. |
S30400 (304) | S30403 (304L) |
|
Key Alloying |
Cr 18–20%, Ni 8–10.5%, C ≤ 0.08% (304) / ≤ 0.03% (304L) |
|
Density |
7.93 g/cm³ |
|
Tensile Strength |
515 MPa (min) |
|
Yield Strength |
205 MPa (min) |
|
Elongation |
40% (min) |
|
Hardness (Brinell) |
≤ 201 HB |
|
Operating Temp. |
Up to 870°C continuous / 925°C intermittent |
|
Standards |
ASTM A276, ASTM A479, EN 1.4301 (304) / EN 1.4307 (304L) |
304 and 304L are the most widely used stainless steel grades in the world, accounting for over 50% of all stainless production. The 18% chromium and 8% nickel composition delivers an outstanding balance of corrosion resistance, formability, weldability, and strength at a commercially attractive price point.
Grade 304L is the low-carbon variant. Reducing carbon to 0.03% maximum eliminates the risk of sensitisation — carbide precipitation at grain boundaries during welding — making it the preferred choice for welded fabrications without the need for post-weld annealing.
Why Choose 304 Stainless Steel Angles?
Stainless Steel 304 Angles are the structural workhorse of the industry. Equal-leg 304 angles are used extensively in structural framing, equipment skids, conveyor frames, and architectural applications where aesthetic appearance, moderate corrosion resistance, and ease of fabrication are all required simultaneously. Unequal-leg 304 angles provide added flexibility for asymmetric load-bearing designs.
304 U-Channels and C-Channels are deployed in racking systems, cable management, machine guards, and food-processing line structures. The 2B and BA surface finishes available on 304 flats meet stringent hygiene standards for pharmaceutical and food-contact applications.
Applications — 304 / 304L Flats, Angles & Channels
- Structural frameworks for food-processing and dairy plants
- Pharmaceutical manufacturing equipment supports and guards
- Kitchen and catering equipment — countertops, frames, brackets
- Chemical processing equipment at ambient-to-moderate temperatures
- Architectural cladding frames, balustrades, and handrails
- Water and wastewater treatment plant structures
- Pulp and paper mill frames and conveyor supports
- Cable trays, conduit brackets, and electrical enclosures
- Marine deck fittings and coastal construction framing
- Storage tanks, pressure vessel supports, and skid fabrications
Grade 309 / 309S — High-Temperature Heat-Resistant Grade
|
Stainless Steel 309 / 309S — At a Glance |
|
|
UNS No. |
S30900 (309) | S30908 (309S) |
|
Key Alloying |
Cr 22–24%, Ni 12–15%, C ≤ 0.20% (309) / ≤ 0.08% (309S) |
|
Density |
7.98 g/cm³ |
|
Tensile Strength |
515 MPa (min) |
|
Yield Strength |
205 MPa (min) |
|
Elongation |
40% (min) |
|
Max Service Temp. |
1095°C continuous / 1120°C intermittent |
|
Standards |
ASTM A276, ASTM A479 |
Grade 309 / 309S contains significantly higher chromium (23%) and nickel (13%) compared to 304, giving it excellent oxidation resistance at elevated temperatures. Grade 309S is the low-carbon version, preferred for welded assemblies to avoid sensitisation. Both grades form a stable, adherent oxide scale at temperatures where 304 would oxidise rapidly.
Applications — 309 / 309S Flats, Angles & Channels
- Furnace components, burner nozzles, and heat shields
- Kiln linings and annealing box supports
- Flue gas handling systems and stack liners
- Heat exchangers operating above 700°C
- Expansion joints in high-temperature pipework
- Petrochemical reactor supports exposed to elevated temperatures
Grade 316 / 316L — Superior Corrosion Resistance
|
Stainless Steel 316 / 316L — At a Glance |
|
|
UNS No. |
S31600 (316) | S31603 (316L) |
|
Key Alloying |
Cr 16–18%, Ni 10–14%, Mo 2–3%, C ≤ 0.08% (316) / ≤ 0.03% (316L) |
|
Density |
8.00 g/cm³ |
|
Tensile Strength |
515 MPa (min) |
|
Yield Strength |
205 MPa (min) |
|
Elongation |
40% (min) |
|
Hardness (Brinell) |
≤ 217 HB |
|
Pitting Resistance |
PRE ≈ 25 (vs 18 for grade 304) |
|
Standards |
ASTM A276, ASTM A479, EN 1.4401 (316) / EN 1.4404 (316L) |
The addition of 2–3% molybdenum sets Grade 316 apart from 304. Molybdenum dramatically improves resistance to pitting and crevice corrosion in chloride-bearing environments — making 316 the grade of choice wherever salt water, chlorinated cleaning agents, or halide process chemicals are present.
Grade 316L, with its reduced carbon content, eliminates the risk of sensitisation during welding without requiring post-weld heat treatment, and is the preferred specification for heavy-section welded fabrications in marine, offshore, and pharmaceutical environments.
Why Choose 316 Stainless Steel Angles?
Stainless Steel 316 Angles are extensively used in coastal and offshore structural applications, chemical plant fabrication, and pharmaceutical manufacturing, where Grade 304 would suffer accelerated pitting and crevice attack. The enhanced pitting resistance index (PRE ~25 vs ~18 for 304) provides a meaningful safety margin in chloride-rich service.
316 U-Channels and C-Channels are the first choice for marine vessel deck structures, offshore platform gratings, and submerged seawater handling. In the pharmaceutical and biotech sectors, 316L polished angles and flats meet the surface-finish requirements of cleanroom and GMP environments.
Applications — 316 / 316L Flats, Angles & Channels
- Marine and offshore platform structures, gangways, and handrails
- Chemical plant frames and equipment skids exposed to chlorides, acids, or alkalis
- Pharmaceutical and biotech cleanroom structural elements and equipment supports
- Coastal architectural structures, pier railings, and jetty components
- Food and beverage processing lines — particularly with brine, vinegar, or saline solutions
- Swimming pool surrounds and water-park structures
- Heat exchangers handling seawater or brackish water
- Pulp, paper, and bleaching plant structures
- Medical device manufacturing frames and sterilisation equipment
- Nuclear plant structural supports requiring superior corrosion performance
Grade 321 / 321H — Titanium-Stabilised, Weld-Safe
|
Stainless Steel 321 / 321H — At a Glance |
|
|
UNS No. |
S32100 (321) | S32109 (321H) |
|
Key Alloying |
Cr 17–19%, Ni 9–12%, Ti ≥ 5 × C% (stabiliser), C ≤ 0.08% / ≤ 0.10% |
|
Density |
7.93 g/cm³ |
|
Tensile Strength |
515 MPa (min) |
|
Yield Strength |
205 MPa (min) |
|
Elongation |
40% (min) |
|
Max Service Temp. |
870°C (321) / 900°C (321H, for elevated-temp creep strength) |
|
Standards |
ASTM A276, ASTM A479 |
Grade 321 is stabilised with titanium, which preferentially combines with carbon to form titanium carbide rather than allowing chromium carbide to precipitate at grain boundaries. This makes 321 immune to sensitisation and highly resistant to intergranular corrosion in the temperature range 425–900°C — a range where unstabilised grades like 304 are vulnerable.
Grade 321H has a higher carbon content (0.04–0.10%), which confers superior creep strength at sustained elevated temperatures, making it the preferred choice for long-term high-temperature structural applications.
Applications — 321 / 321H Flats, Angles & Channels
- Aircraft exhaust manifolds, jet engine components, and thermal shields
- Expansion bellows and compensators in high-temperature pipework
- Refinery and petrochemical furnace internals
- Heat exchanger components operating in the sensitisation range
- Welded structures that cannot be post-weld annealed
- Chemical plant ducting and supports at elevated temperature
Grade 409 — Ferritic, Cost-Effective Structural Grade
| Stainless Steel 409 — At a Glance | |
| UNS No. | S40900 |
| Key Alloying | Cr 10.5–11.75%, Ti (stabilised), C ≤ 0.08% |
| Density | 7.75 g/cm³ |
| Tensile Strength | 380 MPa (min) |
| Yield Strength | 205 MPa (min) |
| Elongation | 20% (min) |
| Max Service Temp. | 800°C |
| Standards | ASTM A240, ASTM A276 |
Grade 409 is a ferritic, titanium-stabilised stainless steel with the lowest chromium content in the stainless family. Its primary advantage is cost — it uses less alloying material than austenitic grades. Despite this, 409 provides adequate corrosion resistance for automotive and exhaust applications, good high-temperature oxidation resistance, and excellent formability. It is magnetic.
Applications — 409 Flats, Angles & Channels
- Automotive exhaust systems, mufflers, and catalytic converter substrates
- Agricultural equipment frames and implements
- Structural sections in mildly corrosive outdoor environments
- Bus and rail vehicle body panels and frame sections
- Coal handling and mining equipment supports
Grade 410 — Martensitic, High Strength
|
Stainless Steel 410 — At a Glance |
|
|
UNS No. |
S41000 |
|
Key Alloying |
Cr 11.5–13.5%, C ≤ 0.15% |
|
Density |
7.75 g/cm³ |
|
Tensile Strength |
450 MPa (annealed) — up to 1300 MPa (hardened) |
|
Yield Strength |
205 MPa (annealed) |
|
Elongation |
20% (min, annealed) |
|
Hardness |
HB 207 (annealed) / HRC 40 (hardened & tempered) |
|
Standards |
ASTM A276, ASTM A479 |
Grade 410 is a martensitic stainless steel — the only category that can be hardened and tempered through heat treatment to achieve very high tensile and hardness values. It is magnetic and offers moderate corrosion resistance in mild environments, suitable for applications requiring hardness and strength alongside basic stainless properties. Not recommended for welding in the hardened state.
Applications — 410 Flats, Angles & Channels
- Pump shafts, valve seats, and wear plates
- Turbine blades and compressor blades
- Cutlery, surgical instruments, and knife blades
- Structural frames in mildly corrosive environments where high strength is needed
- Petrochemical column internals and trays
- Fasteners, screws, and bolts requiring moderate corrosion resistance with high hardness
Size Charts
Stainless Steel Equal Angles — Standard Sizes
|
Size (mm × mm × mm) |
Weight (kg/m) |
Sectional Area (cm²) |
Moment of Inertia Ix (cm⁴) |
|
20 × 20 × 3 |
0.90 |
1.13 |
0.40 |
|
25 × 25 × 3 |
1.12 |
1.43 |
0.80 |
|
30 × 30 × 3 |
1.35 |
1.73 |
1.35 |
|
40 × 40 × 4 |
2.42 |
3.08 |
4.47 |
|
50 × 50 × 5 |
3.77 |
4.80 |
11.0 |
|
60 × 60 × 6 |
5.42 |
6.91 |
22.8 |
|
75 × 75 × 6 |
6.85 |
8.73 |
44.9 |
|
75 × 75 × 8 |
9.03 |
11.50 |
58.8 |
|
100 × 100 × 8 |
12.20 |
15.50 |
139.0 |
|
100 × 100 × 10 |
15.10 |
19.20 |
170.0 |
|
120 × 120 × 10 |
18.20 |
23.20 |
290.0 |
|
150 × 150 × 10 |
23.00 |
29.30 |
580.0 |
Stainless Steel Unequal Angles — Standard Sizes
|
Size (mm × mm × mm) |
Weight (kg/m) |
Sectional Area (cm²) |
|
40 × 25 × 4 |
1.93 |
2.45 |
|
50 × 30 × 5 |
2.99 |
3.80 |
|
60 × 40 × 5 |
3.76 |
4.79 |
|
75 × 50 × 6 |
5.65 |
7.19 |
|
80 × 60 × 7 |
7.36 |
9.38 |
|
100 × 65 × 8 |
10.20 |
13.00 |
|
100 × 75 × 8 |
10.70 |
13.60 |
|
125 × 75 × 8 |
12.30 |
15.70 |
|
150 × 100 × 10 |
19.40 |
24.70 |
Stainless Steel Channels (C / U) — Standard Sizes
|
Size (mm) |
Flange Width (mm) |
Thickness (mm) |
Weight (kg/m) |
|
50 |
38 |
4.8 |
3.67 |
|
75 |
40 |
5.0 |
5.59 |
|
100 |
50 |
5.5 |
8.33 |
|
125 |
65 |
6.0 |
12.90 |
|
150 |
75 |
6.5 |
17.90 |
|
180 |
75 |
7.0 |
20.70 |
|
200 |
75 |
7.5 |
24.10 |
|
230 |
90 |
8.0 |
31.80 |
|
250 |
90 |
9.0 |
36.20 |
Stainless Steel Flats — Standard Sizes
|
Width (mm) |
Thickness (mm) |
Standard Length (m) |
Weight (kg/m) |
|
20 |
3 |
6 |
0.47 |
|
25 |
3 |
6 |
0.59 |
|
30 |
4 |
6 |
0.94 |
|
40 |
4 |
6 |
1.25 |
|
50 |
5 |
6 |
1.96 |
|
60 |
5 |
6 |
2.35 |
|
75 |
6 |
6 |
3.53 |
|
100 |
8 |
6 |
6.28 |
|
100 |
10 |
6 |
7.85 |
|
150 |
10 |
6 |
11.78 |
|
200 |
12 |
6 |
18.84 |
Custom widths, thicknesses, and lengths are available on request. Minimum order quantities apply for non-standard sizes.
Technical Details
Chemical Composition (%) — Quick Reference
|
Grade |
C (max) |
Cr |
Ni |
Mo |
Ti / Other |
|
303 |
0.15 |
17–19 |
8–10 |
— |
S added |
|
304 |
0.08 |
18–20 |
8–11 |
— |
— |
|
304L |
0.03 |
18–20 |
8–12 |
— |
— |
|
309 |
0.20 |
22–24 |
12–15 |
— |
— |
|
309S |
0.08 |
22–24 |
12–15 |
— |
— |
|
316 |
0.08 |
16–18 |
10–14 |
2–3 |
— |
|
316L |
0.03 |
16–18 |
10–14 |
2–3 |
— |
|
321 |
0.08 |
17–19 |
9–12 |
— |
Ti ≥ 5×C |
|
321H |
0.10 |
17–19 |
9–12 |
— |
Ti ≥ 4×C |
|
409 |
0.08 |
10.5–11.75 |
— |
— |
Ti stabilised |
|
410 |
0.15 |
11.5–13.5 |
— |
— |
Martensitic |
Mechanical Properties — Quick Reference
|
Grade |
Tensile (MPa) |
Yield (MPa) |
Elongation (%) |
Hardness (HB max) |
|
303 |
515 |
205 |
40 |
262 |
|
304 |
515 |
205 |
40 |
201 |
|
304L |
485 |
170 |
40 |
201 |
|
309 |
515 |
205 |
40 |
217 |
|
316 |
515 |
205 |
40 |
217 |
|
316L |
485 |
170 |
40 |
217 |
|
321 |
515 |
205 |
40 |
217 |
|
321H |
515 |
205 |
40 |
217 |
|
409 |
380 |
205 |
20 |
179 |
|
410 |
450 |
205 |
20 |
207 |
Product Standards & Specifications
|
Standard |
Scope |
|
ASTM A276 |
Stainless steel bars and shapes (angles, channels, flats) |
|
ASTM A479 |
Stainless steel bars and shapes for pressure vessels |
|
ASTM A484 |
General requirements for stainless steel bars and shapes |
|
EN 10088-3 |
European standard — technical delivery conditions for semi-finished products |
|
JIS G4303 |
Japanese standard — stainless steel bars |
|
BS 970 |
British standard for wrought steels |
|
ISO 9001 |
Quality management system certification |
Industry Applications
Stainless Steel Flats, Angles, and Channels serve as the structural backbone across dozens of industries. Here is a sector-by-sector breakdown:
|
Industry / Sector |
Typical Application |
|
Food & Beverage Processing |
Processing line frames, conveyor structures, tank supports, hygiene-critical brackets |
|
Pharmaceutical & Biotech |
GMP-compliant cleanroom framing, equipment skids, sterilisation unit supports |
|
Oil, Gas & Petrochemical |
Pipe supports, cable tray structures, valve and instrument frames, offshore platforms |
|
Chemical Processing |
Reactor frames, vessel supports, ducting and flue gas structures |
|
Construction & Architecture |
Handrails, balustrades, cladding frames, mezzanine structures, curtain wall supports |
|
Water & Wastewater Treatment |
Filter frames, pump bases, walkways, grating supports, tank stiffeners |
|
Marine & Offshore |
Deck structures, gangways, ladder rails, hull fittings, subsea supports |
|
Automotive & Transportation |
Exhaust systems, vehicle body sections, bus and rail structural members |
|
Power Generation |
Turbine ancillary structures, cooling tower supports, steam line hangers |
|
Pulp & Paper |
Bleaching plant frames, wet-end structural supports, chemical storage supports |
|
Aerospace & Defence |
Exhaust manifolds, thermal shields, high-temperature structural sections |
|
General Engineering / Fabrication |
Machine guards, racking, brackets, custom weldments and structural assemblies |
Cities We Deliver To
Bombay Metal Corporation supplies Stainless Steel Flats, Angles, and Channels across India and exports worldwide. Our major delivery destinations include:
|
India — Major Cities |
India — Additional Locations |
International |
|
Bangalore |
Ludhiana |
Dubai, UAE |
|
Mumbai |
Chandigarh |
Dammam, Saudi Arabia |
|
Chennai |
Rajkot |
Jakarta, Indonesia |
|
Hyderabad |
Vadodara |
Ulsan, South Korea |
|
Pune |
Surat |
Brisbane, Australia |
|
Ahmedabad |
Nagpur |
Singapore |
|
Delhi / NCR |
Coimbatore |
Muscat, Oman |
|
Kolkata |
Visakhapatnam |
Houston, USA |
|
Gurgaon |
Indore |
Antwerp, Belgium |
|
Navi Mumbai |
Jamshedpur |
Colombo, Sri Lanka |
|
Faridabad |
Jaipur |
Dhaka, Bangladesh |
|
Bhopal |
Pimpri-Chinchwad |
Kuala Lumpur, Malaysia |
For delivery to locations not listed above, please contact us. We work with reliable logistics partners to fulfil orders across all major ports and industrial hubs.
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