Super Duplex Steel Flange

Trusted super duplex steel flange manufacturer in India for high-performance forged flanges in extreme environments.

Super Duplex Steel Flange

Suntech Forge India is a trusted Super Duplex Steel Flange Manufacturer in India, supplying high-performance forged flanges designed for extreme environments requiring superior strength and corrosion resistance.

verified_user Excellent Corrosion Resistance

workspace_premium High Strength & Durability

shield_with_heart Withstands Extreme Conditions

military_tech Long Service Life

Super Duplex Flange Specification

- Size

1/2 in to 60 in

- Class

150 to 2500 LBS

- Face Type

FF, RF, RTJ

- Pressure

PN6 to PN64

- Standards

ANSI B16.5, B16.47, MSS SP44

- Method

Free / Die Forging

Product Overview

Super Duplex flanges are widely used in offshore, marine, and chemical industries where high pressure, temperature resistance, and durability are critical.

Material Grades and Standards

UNS S32750
UNS S32760
WNR 1.4410
BS 4504
EN 10253-2
EN 1092-1

Manufacturing Standards

ANSI B16.5
ANSI B16.47 Series A and B
API 605
MSS SP44
AWWA
Custom Drawings

Forging Method

Open Die Forging
Closed Die Forging
Drop Forging
Impression Die Forging
Upset Forging
Hot / Cold Forging

Our Capability

Forging
Machining and Sawing
Heat Treatment

Value Added Services

Annealing
Heat Treatment
Hardening
Normalizing
Quenched and Tempering
Age Hardening

Surface Finish

Forged Black
Proof Machined

Packaging

Wooden Case
Carton Box
Protective Paper

Testing and Quality Assurance

Radiography Testing
Ultrasonic Testing
PMI Testing
Liquid Penetrant Testing
NDT Testing

Certifications

MTC (Material Test Certificate)
Third Party Inspection
Raw Material Certificate
100% Radiography Test

Benefits of Super Duplex Flanges

High Strength
Superior Corrosion Resistance
Longer Service Life
Improved Weldability

Types of Super Duplex Flanges

Weld Neck Flanges
Slip-On Flanges
Socket Weld Flanges
Blind Flanges
Figure-8 Blank
Paddle Blank and Spacer
Plate Flanges

Pressure Rating Chart

Size	Class 2500	Class 1500	Class 900	Class 600	Class 300	Class 150
1/2 in	6000	3600	2160	1440	720	285
2 in	12300	7400	4440	2960	1480	740
4 in	24600	14800	8880	5920	2960	1480
6 in	37000	22200	13320	8880	4440	2220
10 in	61600	37000	22200	14800	7400	3700

Flange Size Chart

NPS	OD (mm)	Bolts	BCD (mm)	Thickness (mm)
1/2 in	108	4	94	14
1 in	140	4	114	16
2 in	180	4	152	22
4 in	250	8	200	30
6 in	300	8	230	35
10 in	400	8	290	45
12 in	450	12	320	50

Weight Chart

NPS	Class 150 (kg)	Class 300 (kg)	Class 600 (kg)
1/2 in	1.50	2.30	3.00
1 in	2.00	3.00	3.80
2 in	3.00	4.50	6.00
4 in	6.50	9.80	13.00
6 in	10.00	15.00	20.00
10 in	20.00	30.00	40.00

Equivalent Standards

Standard	Grade
UNS	S32750 / S32760
EN	1.4410
DIN	X2CrNiMoN25-7-4
ISO	S32750
JIS	SUS32950

Chemical Composition

Carbon: <= 0.03%
Chromium: 24 - 26%
Nickel: 6 - 8%
Silicon: <= 1%
Sulfur: <= 0.01%

Mechanical Properties

Tensile Strength: 620 - 850 MPa
Yield Strength: 450 MPa
Elongation: >= 25%
Hardness: 285 - 330 HB
Modulus: 200 GPa

Physical Properties

Density: 7.8 g/cm3
Melting Point: 1350 - 1400 deg C
Thermal Conductivity: 14.5 W/m.K
Electrical Resistivity: 0.75 uOhm.cm

Maximum Operating Temperature

Material	Max Temp
Super Duplex 2507	300 deg C
Super Duplex 2205	250 deg C
Super Duplex 32760	280 deg C

Applications

Offshore Platforms
Marine Industry
Chemical Processing
Oil and Gas
Heat Exchangers

Export Countries

Japan
South Korea
Bangladesh
Brazil
Chile
UAE

Price Information

Super Duplex Steel Flange Price

For latest price and quotation:
sales@suntechforge.com

Ready Stock

Weld Neck Flanges
Slip-On Flanges
Blind Flanges
Plate Flanges

Delivery Time

Export to	Shipping Time
Japan	7 Days
Sri Lanka	5 Days
Bangladesh	14 Days
Taiwan	15 Days
Brazil	45-60 Days
Chile	45 Days