Alloy Steel Flanges manufacturers in India

Top 9 Characteristics of Alloy Steel Flanges

Alloying Elements :

  • Alumnium, Cobalt, Silicon, Chromium

Two Sub Types :

  • Low Alloy and High alloy

Advantages :

  • Best for Cold Forming

Suitable For :

  • Petrochemical

Features :

  • Good Wear Resistance

Corrosion Resistant :

  • Resistant to Rust

Condition :

  • Tempered and Quenched

Standard :

  • ASTM A182

Testing :

  • Hydrostatic Testing

Alloy steel flanges are pressurized grades that are used across different oil and gas applications. Alloy Steel Forged Flanges are high-strength flange that provide support to different applications. These flange have an excellent surface porosity with a finer grain structure. The Chrome Moly Flanges have excellent resistance to corrosive media in reducing conditions. The super-strength flange can work well in high-pressure and elevated temperature setups.


Chrome Moly Flange Supplier in PE, PTFE and FBE Coatings

Chrome moly flange have a low content of alloys allowing the flange to possess enhanced ductility and workability. Our company is an Alloy Steel Flanges manufacturers in India who make use of the best raw materials and cutting-edge technology to produce the best products in the industry.


ASTM A182 Alloy Steel Flange Specifications

Manufacturing Size Range :

Manufacturing Size Range :

  • DN15 To DN1500
  • NPS: ½" to 24"
  • PN2.5 To PN400
  • Contact Alloy Steel Flanges manufacturers in India for above 48 Inch
Pressure Class :

Pressure Class :

  • Class 150 & 300
  • Class 600 & 900
  • Class 1500 & 2500
Maximum Size :

Maximum Size :

  • 26" To 60"
Manufacturing Process :

Manufacturing Process :

  • Plate
  • Forged
  • Cast
Bolts Hole :

Bolts Hole :

  • 4 To 48
Type Of Surface Finish :

Type Of Surface Finish :

  • Cold Water Finish
  • Concentric Serrated
  • Mirror Finish
  • Stock & Smooth
  • Spiral Serrated
Sealing Surface :

Sealing Surface :

  • RTJ Face
  • Male & Female Face
  • RF Face
  • Tongue & Groove Face
  • FF Face
Threads Types :

Threads Types :

  • FPT Threads
  • BSPT Threads
  • MPT & MNPT Threads
  • BSP Threads
  • NPT Threads
Available THK :

Available THK :

  • SCH 10/ 20/ 40
  • SCH 60/ 80/ 100
  • SCH 120/ 140/ 180
Application :

Application :

  • Nuclear Energy
  • Oil & gas plants
  • Petrochemicals
  • Power Generation
Testing & Inspection :

Testing & Inspection :

  • Impact test
  • Hardness test
  • Tensile test
  • PMI test
  • Material inspection
Melting Point

Melting Point

  • 1432℃
End Connection :

End Connection :

  • Welding
  • Threaded
Marking :

Marking :

  • Manufacturers Name
  • Grade & Material
  • Size & Schedule
  • Standard & Heat No.
Life :

Life :

  • Alloy Steel = 18 To 22
JIS Standard :

JIS Standard :

AWWA Standard :

AWWA Standard :

BS Standard :

BS Standard :

Value Added Services :

Value Added Services :

  • Minor Fabrication
  • Casting
  • Polishing
  • Beveling end
  • Threading
Logistics :

Logistics :

  • By Sea
  • By Air
  • Uk = 30 day
  • France = 30 day
  • South Africa = 25-30 days
  • Turkey = 21 days
  • Germany = 20 days
  • Poland = 45 day
  • Sweden = 45 day
Packaging :

Packaging :

  • Wooden Pallet
  • Carton Box
  • Wooden Cases
Documentation & Reports :

Documentation & Reports :

  • Raw material test reports
  • Material traceability records
  • Fumigation certificates
Applicable Fluids :

Applicable Fluids :

  • Oil and Gas
  • Steam
  • Water & Air
Top Coating  :

Top Coating :

  • Anti rust
  • Zinc coatings
  • PE/ PTFE/ FBE coating
  • Back painting

Keep Ex Stock of Alloy Steel Blind Flange From German Sourced Raw Material At Best Price

The Alloy Steel Slip On Flangeare slid on different pressurized components and welded using fillet welds. These flange have a low-profile head and are used in applications in the oil and gas industry where the stress on the grade is low. Alloy Steel Weld Neck Flange is a high-strength grade that is utilized to provide support and stability to different pipes. These flange have a protruded hub and are welded using a butt-weld. An Alloy Steel Blind Flange, on the contrary, doesn’t have a hub or lip. These flange help in terminating the fluid and gaseous flow in the system.

Alloy Steel Blind Flange Price List

Size Price in US (Dollar) Price in UAE (Dirham) Price In Bahraini Dinar (Bahrain)
DN15 US $2.37 AED 8.71 BHD 0.89
DN20 US $3.48 AED 12.78 BHD 1.31
DN25 US $4.79 AED 17.59 BHD 1.81
DN32 US $5.15 AED 18.92 BHD 1.94
DN40 US $6.46 AED 23.73 BHD 2.43
DN50 US $7.30 AED 26.81 BHD 2.75
DN65 US $10.23 AED 37.58 BHD 3.86
DN80 US $13.49 AED 49.55 BHD 5.08
DN100 US $17.43 AED 64.02 BHD 6.57
DN125 US $21.18 AED 77.79 BHD 7.98
DN150 US $28.20 AED 103.58 BHD 28.20
DN200 US $46.50 AED 170.80 BHD 17.53
DN250 US $65.75 AED 241.50 BHD 24.78
DN300 US $87.14 AED 320.07 BHD 32.84
DN350 US $119.54 AED 439.07 BHD 45.06
DN400 US $145.15 AED 533.14 BHD 145.15
DN450 US $197.34 AED 724.83 BHD 197.34
DN500 US $235.97 AED 866.72 BHD 88.94
DN600 US $369.17 AED 1355.97 BHD 139.15

Compare Sizes With Different Alloy Steel Flanges manufacturers in India, Save 15%-20% By Ordering Directly From The stockist in Mumbai.


AS Pipe Flange Material Grade

Alloy Steel Flanges Size Range

Standard Pressure Class Size
ASME B16.5 150# to 2500# 1/4" to 48"
ASME B16.36 300# to 2500# 1/2" to 24"
ASME B16.47 150# to 900# 26" to 60"
ASME B16.48 150# to 2500# 1 1/2" to 24"

Testing for Alloy Steel Pipe Flange

Testing for Alloy Steel Pipe Flange

What Determines The Alloy Steel Forging Flange Thickness?

Right Pipe Size :

Pipe Thickness :

Internal Pressure of Pipe :

Standards :

Codes Used :

How to Ensure Quality With Alloy Steel Flanges Suppliers?

  • Check the Documenation

  • High Quality Material

  • Cost-Effectiveness

  • Should Follow International Standards

Alloy Steel Blind Flange Bolt Chart

Size Length of Machine Bolt Length of RF Stud UNC Bolt Size Bolts Number
DN600 150 170 1 1/4 20
DN500 140 160 1 1/8 20
DN400 115 135 1 16
DN300 100 120 7/8 12
DN200 90 110 3/4 8
DN100 75 90 5/8 8
DN90 75 90 5/8 8
DN80 75 90 5/8 4
DN50 70 85 5/8 4
DN40 65 70 1/2 4
DN25 55 65 1/2 4
DN20 50 65 1/2 4
DN15 50 55 1/2 4

What Makes Alloy Steel Plate Flange Important in Industrial Operation?

What Makes Alloy Steel Plate Flange Important in Industrial Operation?

Which Factor May Cause Cracks in Alloy Steel WNRF Flange?

  • Lack of Preheat
  • Low Fatigue Strength
  • Alloy Steel Microstructure

Manufacturing Standards for Alloy Steel Flanges

API 605 & ASME :

  • USA

BS EN 1092-1 & AWWA :

  • Europe

BS 10 :

  • Australia and UK

DIN and JIS :

  • Germany & Japan

Ghost :

  • Russia

UNI 2276 :

  • Italy

Documentation of Alloy Steel Socket Weld Flange

  • Heat Treatment Chart

  • Commercial Invoice

  • Material Traceability Report

  • Packaging List

  • Raw Material Test Report

  • Quality Assurance Plan

Top Application of Alloy Steel Lap Joint Flanges

Top Application of Alloy Steel Lap Joint Flanges

High Temp Alloy Steel Flanges Physical Properties

Density :

  • -7.7 to 7.9 g/cm³

Melting Point :

  • -1425 to 1510 °C

Thermal Conductivity :

  • -24 to 30 W/m·K

Specific Heat Capacity :

  • -460 J/kg·K

Electrical Resistivity :

  • -0.2 µΩ·m

Modulus of Elasticity :

  • -190 to 210 GPa

Difference Between Alloy Steel Flanges and Chrome Moly Flanges?

Feature Alloy Steel Flanges Chrome Moly Flanges
Strength Strong High Tensile strength
Applications Piping systems Petrochemical
Pressure Handling Good Superior pressure resistance
Temperature Resistance Good Excellent for high temperature
Grades ASTM A182 F1, F5, F9, F91 ASTM A182 F11, F22, F91
Alloying Elements Nickel, Manganese, Chromium, Vanadium, Molybdenum Primarily Chromium and Molybdenum

4 Advantages for Engineers in USA to Buy Alloy Steel Flanges from India

4 Advantages for Engineers in USA to Buy Alloy Steel Flanges from India

Chromoly Blind Flanges Weight Chart

Size Weight (kg)
DN600 196
DN500 130
DN400 82
DN300 50
DN200 20.5
DN100 7.7
DN90 5.9
DN80 4.1
DN65 3.2
DN50 2.3
DN40 1.8
DN32 1.4
DN25 0.9
DN20 0.9
DN15 0.9

Chromium Content of Low Alloy Steel Flanges

Supplier & Stockist Alloy Steel Forged Flanges in Size Ranging From DN15 To DN500, Check Finished Types and UNS Designation

The Alloy Steel Socket Weld Flange is generally seen in small pipes of low pressures. These flange have a recessed area that allows the pipe module to be installed in the grade and subsequently welded in place. Alloy Steel Lap Joint Flanges are a two-component assembly made up of a stub and a lap joint ring. These flange are used in connecting flange that are difficult to move across compact spaces. The Alloy Steel Threaded Flange has threads that allow it to be connected to subsequent modules easily. These flange are seen in lower pressure and temperatures setups. Alloy Steel Plate Flange is a flat circular disc-shaped grade that can be availed at the best rate across our outlets.

Finished Types of Chrome Moly Flanges

  • Electro Polished Plated

  • Nickel Plated

  • Natural

UNS Designation Of Alloy Steel Weld Flanges

Names Of Steel Material Grades UNS Designation
5Cr-0.5Mo ASTM A182 F5 K41545
9Cr-1Mo ASTM A182 F9 K90941
9Cr-1Mo-V ASTM A182 F91 K90901
1.25Cr–0.5Mo–Si ASTM A182 F11 Class 1 K11597
1.25Cr–0.25Mo–Si ASTM A182 F11 Class 2 K11572
1.25Cr–0.5Mo–Si ASTM A182 F11 Class 3 K11572
1Cr-0.5Mo ASTM A182 F12 Class 1 K11562
1Cr-0.5Mo ASTM A182 F12 Class 2 K11564
2.25Cr-1Mo ASTM A182 F22 Class 3 K21590
Refer Tensile Requirements of Alloy Steel Pipe Flanges, and Pressure Rating Of ASTM A182 AS Slip On Flange in Class 150, 300 and 600

Alloy Steel Flanges Tensile Requirements

Grade Tensile Requirements
ASTM A182 F5 275 (ksi)
ASTM A182 F9 380 (ksi)
ASTM A182 F11 205 (ksi)
ASTM A182 F12 275 (ksi)
ASTM A182 F22 205 (ksi)
ASTM A182 F91 380 (ksi)

Difference Between Carbon Steel v/s Alloy Steel Flanges

Carbon Steel Flanges Alloy Steel Flanges
High tensile strength Good strength
Corrosion resistance Good ductility
Heat dissipation properties Safe to process
Efficient at high temperature Environment friendly
Durable Budget friendly
Lightweight long lasting for cookware

Class 150 Alloy Steel Flanges Pressure Rating

38°C 50°C 100°C 150°C 200°C
19.6 19.2 17.7 15.8 13.8
250°C 300°C 325°C 350°C 375°C
12.1 10.2 9.3 8.4 7.4
400°C 425°C 450°C 475°C 500°C
6.5 5.5 4.6 3.7 2.8

Class 300 Alloy Steel Forged Flanges Pressure Rating

38°C 50°C 100°C 150°C 200°C
51.1 50.1 46.6 45.1 43.8
250°C 300°C 325°C 350°C 375°C
41.9 39.8 38.7 37.6 36.4
400°C 425°C 450°C 475°C 500°C
34.7 28.8 23 17.4 11.8

Class 600 Alloy Steel Pipe Flanges Pressure Rating

38°C 50°C 100°C 150°C 200°C
102.1 100.2 93.2 90.2 87.6
250°C 300°C 325°C 350°C 375°C
83.9 79.6 77.4 75.1 72.7
400°C 425°C 450°C 475°C 500°C
69.4 57.5 46 34.9 23.5
Learn About The Alloy Steel Weld Flanges Forging Temperature and Alloying Elements as per ASME B16.5.

Forging Temperature Of Alloy Flange

  • 540°C to 870°C

Alloying Elements Of Chromemoly Flange

Elements Effects
C (Carbon) Raises tensile strength
Chromium (CR) Increases hardness
Cobalt (CO) Increases strength
Columbium (CB) Stabilizing elements
Copper (CU) Hot working
Manganese (MN) Improve forgeability
Molybdenum (MO) Increases hardenability
Nickel (NI) Increases toughness
Phosphorus (P) Improves machinability
Silicon (SI) Increases tensile strength
Tungsten (W) Increases wear resistance

High Alloy Steel Flanges Temperature Range

  • Excellent Strength = -253℃ to 705℃

  • Excellent Oxidation Resistance = 980℃

Types Of Alloy Steel Flanges

Alloy Steel Reducing Flange

Alloy Steel Reducing Flange

ASTM A182 Low Alloy Steel Square Flanges

ASTM A182 Low Alloy Steel Square Flanges

Chromoly Steel Spectacle Blind Flanges

Chromoly Steel Spectacle Blind Flanges

ASME SA 182 AS Weld Neck Flange (WNRF)

ASME SA 182 AS Weld Neck Flange (WNRF)

ANSI B16.5 Alloy Steel Blind Flanges (BLRF)

ANSI B16.5 Alloy Steel Blind Flanges (BLRF)

ASME B16.5 Alloy Steel Plate Flanges

ASME B16.5 Alloy Steel Plate Flanges

Chrome Moly Alloy Steel Puddle Flanges

Chrome Moly Alloy Steel Puddle Flanges

AS Forged Flanges

AS Forged Flanges

Chrome Moly High Hub Blind Flanges

Chrome Moly High Hub Blind Flanges

ASME SA182 Alloy Steel Orifice Flanges

ASME SA182 Alloy Steel Orifice Flanges

ANSI B16.5 Chrome Moly Socket Weld Flanges (SWRF)

ANSI B16.5 Chrome Moly Socket Weld Flanges (SWRF)

ASTM A182 Alloy Steel Spade Flange

ASTM A182 Alloy Steel Spade Flange

Ferritic Alloy Steel Long Weld Neck Flanges

Ferritic Alloy Steel Long Weld Neck Flanges

High Temperature Low Alloy Steel Bleed Ring Flange

High Temperature Low Alloy Steel Bleed Ring Flange

Chrome Molybdenum Alloy Steel Threaded / Screwed Flanges

Chrome Molybdenum Alloy Steel Threaded / Screwed Flanges

High Alloy Steel Raised Face Flanges

High Alloy Steel Raised Face Flanges

Chromium Alloy Steel Tongue & Groove Flanges

Chromium Alloy Steel Tongue & Groove Flanges

Chrome Alloy Steel Ring Spacer

Chrome Alloy Steel Ring Spacer

Intermediate Alloy Steel Ring Type Joint Flanges (RTJ)

Intermediate Alloy Steel Ring Type Joint Flanges (RTJ)

High Temperature Alloy Steel Nipo flange

High Temperature Alloy Steel Nipo flange

High Temp Alloy Steel Weldo Flange

High Temp Alloy Steel Weldo Flange

Cast Alloy Steel Male & Female Flanges

Cast Alloy Steel Male & Female Flanges

Chromoly Steel Alloy Lap Joint Flanges

Chromoly Steel Alloy Lap Joint Flanges

Chromoly Alloy Steel Slip On Flanges (SORF)

Chromoly Alloy Steel Slip On Flanges (SORF)


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