What is Stainless Steel 304/304L/304H Flanges ?

Stainless steel is considered as the strongest and most recommended material for the manufacturing of commercial as well as household alloys. Stainless steel has unique properties and characteristics that differs it from other alloys. Stainless steel 304 flanges are highly efficient and effective. These flanges are commonly used for industrial and plumbing purposes.

Flanges are generally used for creating permanent or temporary joints between two pipes in order to transfer material or fluids from one place to another. These flanges are used for long term purposes hence the quality and durability is the most prioritized considered feature. Grade 304L is the most demanded grade in all types of industries. Stainless steel 304H flanges are highly ductile and strong. These flanges are made of excellent quality raw material and alloys.


Stainless Steel 304H Threaded Fitting, SS 304H Threaded Pipe Elbow, 304H Stainless Steel Forged Threaded 90deg. Elbow, SS 304H Threaded Fittings, SS UNS S30400 Threaded Bushing, Stainless Steel 304H Threaded Cap, SS 304H Screwed Fittings Supplier in Mumbai, India.

Grade 304L flanges are made of excellent combinations. The chemical composition of this grade includes manganese, nickel, and chromium. The composition also includes some amount of silicon, carbon and phosphorus. These flanges are enriched with extraordinary properties. Grade 304H flanges are capable of tolerating high heat and bad weather conditions.

Stainless steel 304L flanges are enriched with high tensile and yield strength. We at Sumit impex make sure that our product is thoroughly tested and certified. We do multiple tests on all of our products to be sure about the quality of the product.

Stainless Steel 304 Series Flanges Specifications

Specifications : ASTM A182 / ASME SA182
Size : 1/2″ (15 NB) to 48″ (1200NB)
: ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Class / Pressure : 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Standard : ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
SS 304 1.4301 S30400 SUS 304 304S31 08Х18Н10 Z7CN18‐09 X5CrNi18-10
SS 304L 1.4306 / 1.4307 S30403 SUS 304L 3304S11 03Х18Н11 Z3CN18‐10 X2CrNi18-9 / X2CrNi19-11
SS 304H 1.4301 S30409
Grade C Mn Si P S Cr Mo Ni N
SS 304 0.08 max 2 max 0.75 max 0.045 max 0.030 max 18 – 20 8 – 11
SS 304L 0.035 max 2 max 1.0 max 0.045 max 0.030 max 18 – 20 8 – 13
SS 304H 0.10 max 2 max 0.75 max 0.045 max 0.030 max 18 – 20 8 – 10.5
Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %
SS 304/304L
Thermal Conductivity
(BTU/h ft. °F)
(in x 10-6)
Modulus of
(psi x 106
Coefficient of
Thermal Expansion
°F x 10-6
Specific Heat
at 68°F: 0.285 9.4 at 212°F 28.3 at 68°F 28 9.4 at 32 – 212°F 0.1200 at 68°F to 212°F 2500 to 2590
12.4 at 932 °F 39.4 at 752°F 10.2 at 32 – 1000°F
49.6 at 1652 °F 10.4 at 32 – 1500°F
SS 304H
Coefficient of
Thermal Expansion (min/in)-°F
Thermal Conductivity BTU/hr-ft-°F Specific Heat BTU/lbm -°F Modules of Elasticity (annealed)2-psi
at 68 °F at 68 – 212°F at 68 – 1600°F at 212°F at 932°F at 32 – 212°F in tension (E)
0.285 9.2 11.0 9.4 12.4 0.12 29 x 106

Other Products

SS 304 SORF Flanges ASTM A182 SS 304 WNRF Flanges
SS 304 Blind Flanges SUS 304 Spacer Ring Flanges
UNS S30400 Ring Type Joint Flanges SS 304 Nipolet Flanges
SS 304 Nipo Flange SS 304 Long weld Neck Flanges
304 Stainless Steel Pipe Flanges UNS S30400 Nipolet Flanges
WNR. 1.4301 Flat Flange SS 304 Lap Joint Flanges

Stainless Steel 304 Series Flanges Price List

  • 304 stainless steel bars
    US $1000-2500 / Ton
  • ASTM A182 SS 304L rods
    US $2000-3000 / Ton
  • Stainless Steel hex bar 304H
    US $1.5-4.5 / Kilogram
  • ASTM A182 304 stainless steel round bar
    US $1800-2300 / Ton
  • SS 304L square bar
    US $1550-2400 / Ton
  • 304H stainless steel bar manufacturer
    US $1800-2300 / Ton
  • ASTM A182 Gr. 304 rods
    US $1300-2600 / Metric Ton

Different Types of Stainless Steel Grade 304 series Flanges

  • SS 304 Grade Reducing Flanges
  • ASTM A182 Reducing Flange
  • ASME SA182 Reducing Flange
  • UNS S30400 Reducing Flange
  • WNR 1.4301 Reducing Flange
  • SS 304L Ring Joint Flange
  • ASTM A182 Ring Joint Flange
  • ASME SA182 Ring Joint Flange
  • UNS S30403 Ring Joint Flange
  • WNR 1.4306 Ring Joint Flange
  • SS 304H Grade Screw Flanges
  • ASTM A182 Screw Flanges
  • ASME SA182 Screw Flange
  • UNS S30409 Screw Flange
  • WNR 1.4307 Screw Flange


We Sumit Impex Metal Ensure the Best Quality of Packing, Because It Plays an Important Role Especially in the Case of International Shipments in Which Consignment Passes Through Various Channels to Reach the Ultimate Destination, So We Put Extraordinary Concern Regarding Packaging.

We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,

  • Boxes and Crates
  • Shrink-wrapped
  • Carton boxes
  • Wooden pallets
  • Wooden boxes
  • Wooden crates

Testings (Destructive, Non Destructive)

  • Mechanical Testing Such as Tensile, Elongation, Reduction of Area
  • Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
  • Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
  • Positive Material Identification – PMI Testing
  • Chemical Analysis – Spectro Analysis
  • Intergranular Corrosion (IGC) Test
  • Pitting Resistance Test
  • Dye Penetrant Test (DP Test)
  • Micro Test
  • Macro Test
  • Hardness Test
  • Flaring Test
  • Flattening Test
  • Hydrostatic Test
  • Radiography Test
  • Ultra Sonic Test (UT)
  • Eddy Current Testing
  • Impact Test
  • Bend Test

Application Industries

These material are not a single material but the name for a family of corrosion resistant steels. Like many scientific breakthrough the origins of stainless steel lies in a lucky accident. From the smallest part of zipper to the largest building skyscraper, stainless steel is an essential part of modern life.Stainless steel’s strength, resistance to corrosion and low maintenance make it the ideal material for a wide range of applications. It is also has a long life cycle and is 100% recyclable.

  • Construction
  • Bridges
  • Petrochemical Industry
  • Ship Building
  • Engineering
  • General Structural Purposes
  • Offshore and Onshore Services

Stainless Steel 304 Series Flanges Manufacturers

Country we serve / City we deliver

Spain, Trinidad & Tobago, South Africa, Costa Rica, Netherlands, Colombia, Tibet, Afghanistan, Greece, Mongolia, Austria, United Arab Emirates, Angola, India, Jordan, Chile, Mexico, Namibia, Japan, Israel, Macau, Argentina, Ghana, Kuwait, Ecuador, Switzerland, Nigeria, Ukraine, Bulgaria, Poland, South Korea, Chile, United States, Hungary, Bhutan, Norway, Kazakhstan, Belarus, Czech Republic, Morocco, Italy, Denmark, Venezuela, Lebanon, Zimbabwe, Belgium, Slovakia, Yemen, Puerto Rico, Algeria,Sri Lanka, New Zealand, Libya, Iraq, Nepal, Romania, Egypt, Ireland, Kenya, Saudi Arabia, Russia, Indonesia, Singapore, Hong Kong, Peru, Qatar, Azerbaijan, Bahrain, Germany, Australia, United Kingdom, Pakistan, Serbia, Gabon, Taiwan, Iran, Thailand, Oman, Vietnam, Lithuania, Portugal, Finland,Tunisia, Gambia, Brazil, Bangladesh, Turkey, Malaysia, Croatia, France, Sweden, Estonia, China, Philippines, Canada, Bolivia, Nigeria

& Boston, Moscow, Toronto, Geoje-si, Karachi, Istanbul, Courbevoie, Milan, Chiyoda, Thane, Aberdeen, Brisbane, Lagos, Lahore, Vung Tau, Faridabad, Ho Chi Minh City, Colombo, Santiago, Jaipur, Jeddah, Ludhiana, Doha, Haryana, Vadodara, Atyrau, Petaling Jaya, Ahvaz, Ernakulam, Gimhae-si, Surat, Sydney, Bengaluru, Mexico City, Ulsan, Madrid, Bangkok, Pimpri-Chinchwad, Thiruvananthapuram, New York, Bhopal, Howrah, Coimbatore, Chennai, Edmonton, Los Angeles, Rajkot, Mumbai, Sharjah, Cairo, Seoul, London, Jakarta, Abu Dhabi, Dammam, Nashik, Dubai, Hyderabad, Houston, Manama, Calgary, Granada, Rio de Janeiro, Navi Mumbai, Al Khobar,Kanpur, Hong Kong, Nagpur, Port-of-Spain, Ankara, Baroda, Algiers, Ahmedabad, Perth, Gurgaon, Singapore, Busan, Montreal, Al Jubail, Secunderabad, Ranchi, Jamshedpur, New Delhi, Tehran, Kolkata, Caracas, Melbourne, Kuwait City, Dallas, Pune, Muscat, Noida, Indore, Hanoi, Chandigarh, La Victoria, Kuala Lumpur, Bogota, Visakhapatnam

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