SS 409L Flange Supplier Mumbai | Spectacle Blind Flanges

SS 904L flanges are premium-grade stainless steel components designed for industries where ordinary alloys cannot deliver. With a high content of nickel, molybdenum, and copper, SS 904 flanges offer outstanding resistance to strong reducing acids, chlorides, and harsh chemical environments. Unlike standard grades, they provide superior toughness, excellent weldability, and a long service life even under extreme operating conditions. These flanges are a preferred choice in sectors like chemical processing, seawater systems, oil & gas refineries, pharmaceuticals, and food-grade industries, where corrosion resistance, hygiene, and structural integrity are non-negotiable. Their ability to maintain performance in aggressive environments makes them a trusted solution for critical industrial pipelines.

Applications & Advantages
The versatility of SS 904L flanges extends across a wide spectrum of demanding applications. They are widely used in heat exchangers, condensers, storage tanks, and process piping systems that come in contact with corrosive media. Available in multiple configurations such as weld neck, slip-on, blind, threaded, socket weld, and lap joint, these flanges provide flexible installation options tailored to specific industrial requirements. The key benefits of SS 904L include exceptional resistance to pitting and stress corrosion cracking, excellent durability in high-chloride environments, and low maintenance requirements. Their strength-to-performance ratio ensures reduced downtime, lower replacement costs, and reliable efficiency, making them a cost-effective long-term investment for modern industries.

Why Choose SS 904L Flanges
Opting for SS 904L flanges means investing in unmatched durability, safety, and operational excellence. Engineered to meet global standards, they offer peace of mind by enhancing pipeline reliability and ensuring compliance in regulated industries. Their superior resistance to aggressive chemicals and seawater conditions makes them indispensable for organizations focused on sustainability, efficiency, and long-lasting infrastructure. Whether upgrading existing systems or setting up new installations, SS 904L flanges guarantee high performance, reduced risk of system failure, and optimized lifecycle costs. For industries seeking cutting-edge solutions that balance strength with longevity, SS 904L flanges stand out as the ultimate choice.

904L Flanges Equivalent Grades

STANDARD	UNS	WNR.	JIS	BS	KS	AFNOR	EN
SS 904L	N08904	1.4539	SUS 904L	904S13	STS 317J5L	Z2 NCDU 25-20	X1NiCrMoCu25-20-5

SS 904L Slip On Flanges

Stainless Steel 904L SORF Flanges, UNS N08904 / N08904 Slip On Flanges, DIN 1.4539 SORF Flanges, ASME SA 182 SS F904L Slip-on Raised Face

SS 904L Weld Neck Flanges

ASME SA182 SS 904L WNRF, ASTM A182 Stainless Steel 904L Weld Neck, DIN 1.4539 Weld Neck Flanges, UNS N08904 Weld Neck Raised Face Flanges

SS 904L Blind Flanges

SS ASTM A182 F904L Blind, UNS N08904 / DIN 1.4539 Blind Flanges, ASME SA182 SS 904L BLRF, SS 904L Blind Raised Face Flanges Supplier

SS 904L Threaded Flanges

DIN 1.4539 Threaded Flanges, UNS N08904 Screwed, ASME SA 182 SS 904L Threaded Flanges, ASTM A182 904L SS Threaded

SS 904L Socket Weld Flanges

ASTM A182 F904L Stainless Steel Socket Weld Flanges, SS UNS N08904/ N08904 Weld Flanges, SS DIN 1.4539 Socket Weld Flanges

SS 904L Lap Joint Flanges

UNS N08904 Lap Joint Flanges, Stainless Steel 904L Lap Joint Flanges, ASTM A182 F904L Stainless Steel Lap Joint Flanges, ASME SA 182 SS 904L Lap Joint Flanges

SS 904L Ring Type Joint Flange

UNS N08904 Ring Type Joint Flange, ANSI B16.5 SS 904L RTJ Flanges, ASTM A182 F904L Stainless Steel Ring Type Joint Flanges, ASME SA 182 SS 904L Ring Type Joint Flanges

SS 904L Orifice Flanges

UNS N08904 Orifice Flanges, B16.36 Steel 904L Orifice Flanges, ASTM A182 F904L Stainless Steel Orifice Flanges, ASME SA 182 SS 904L Orifice Flanges

SS 904L Long Weld Neck Flanges

UNS N08904 Long Weld Neck Flanges, Stainless Steel 1.4539 Long Weld Neck Flanges, ASTM A182 F904L Stainless Steel Long Weld Neck Flanges, ASME SA 182 SS 904L Long Weld Neck Flanges

SS 904L Spectacle Blind Flanges

UNS N08904 Spectacle Blind Flanges, ANSI / ASME B16.5 Stainless Steel 904L Spectacle Blind Flanges, ASTM A182 F904L SS Spectacle Blind Flanges, SA 182 SS 904L Spectacle Blind Flanges

SS 904L Forged Flanges

UNS N08904 Forged Flanges, B16.5 Stainless Steel 904L Forged Flanges, ASTM A182 F904L Stainless Steel Forged Flanges, ASME SA 182 SS 904L Forged Flanges

SS 904L Plate Flanges

UNS N08904 Plate Flanges, ANSI B16.5 Stainless Steel 904L Plate Flanges, ASTM A182 F904L Stainless Steel Plate Flanges, ASME SA 182 SS 904L Plate Flanges

Stainless Steel Flanges Specification :

ASTM A182 / ASME SA182

Dimension Standard :

ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Standard :

ANSI, ASME, BS, DIN, EN etc...

Size :

1/2" (15 NB) to 48" (1200NB)

Class / Pressure :

150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

Flange Face Type :

Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

DIN Flanges :

DIN 2527, 2566, 2573, 2576, 2641,2642, 2655, 2656, 2627, 2628, 2629, 2631, 2632, 2633, 2634, 2635, 2636, 2637,2638, 2673.

JIS Flanges :

JIS B2220 5K, JIS B2220 10K, JIS B2220 16K, JIS B2220 20K

BS Flanges :

BS4504 PN 6, BS 4504 PN 10, BS4504 PN 16, BS4504 PN 25, BS4504 PN 40, BS 4504 PN 64, BS 4504 PN 100, BS 4504 PN 160, BS 4504 PN 250, BS 10, BS Table D, BS Table E, BS Table F, BS Table H.

Chemical Composition of 904L Flanges

C	Cr	Cu	Mn	Mo	Ni	P	S
Max			Max			Max	Max
0.02	19.0-23.0	2.0	4.0-5.0	23.0-28.0	0.045	0.035	1.0

Mechanical Properties Of SS 904L Flanges

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Rockwell B (HR B)	Brinell (HB)
904L	490	220	36	70-90 typical	150

Physical Properties of 904L SS Flanges

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Co-eff of Thermal Expansion (µm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Elec Resistivity (nΩ.m)
Grade	Density (kg/m3)	Elastic Modulus (GPa)	0-100°C	0-315°C	0-538°C	At 20°C	At 500°C	Specific Heat 0-100°C (J/kg.K)	Elec Resistivity (nΩ.m)
904L	7900	190	15	-	-	11.5	-	500	952