Flange materials specification

Dimensions from carbon steel and stainless steel flanges are defined in the ASME B16.5 standard. The material qualities for these flanges are defined in the ASTM standards.

Pipe flanges raw material specifications

Pipe flanges raw material specifications

The choice of the material largely depends on the purpose of the flange. For example, stainless steel is more durable and is necessary for heavy use.

Requirements are valid for normal situation, in special you have to contact us to introduce.

Flange materials acc. to ASTM

The material qualities for these flanges are defined in the ASTM standards.

These ASTM standards, define the specific manufacturing process of the material and determine the exact chemical composition of pipes, fittings and flanges, through percentages of the permitted quantities of carbon, magnesium, nickel, etc., and are indicated by "Grade".

Flanges Manufacturing Process

For example, a carbon steel flange can be identified with Grade F9 or F11, a stainless-steel flange with Grade F316 or Grade F321 etc..

Below you will find as an example a table with chemical requirements for fittings ASTM A403 Grade WP304, WP304L, WP316L and a table with frequent Grades, arranged on pipe and pipe-components, which belong together as a group. As you may be have noted, in the table below, ASTM A105 has no Grade. Sometimes ASTM A105N is described;

"N" stands not for Grade, but for normalized. Normalizing is a type of heat treatment, applicable to ferrous metals only. The purpose of normalizing is to remove the internal stresses induced by heat treating, casting, forming etc.

Carbon steel flange
Carbon Steel Flanges

Carbon Steel Flanges

The Carbon Steel Flanges are available in various dimensions. Exhibiting the properties such as high strength, high toughness, excellent fatigue strength, superior chemical resistance and high stress-corrosion cracking resistance, these flanges are ideal for connecting various pipes and are significant while support is required for mechanical parts.

Stainless steel flange
Stainless steel flange

Stainless Steel Flange

Stainless Steel flanges are corrosion resistant and have a wide variety of uses. We carry variety of threaded flanges, weld neck flanges and slip on flanges and of course we can can custom build stainless steel flanges to your specifications.
Alloy steel flanges

Alloy steel flanges

Alloy steel flange, that is, the main material is alloy steel flange or end flange connectors. It contains alloy steel flange, known as alloy steel flange.

We shall be pleased to develop Non-Standard

316 / 316L

316/316Lis the most commonly used austenitic stainless steel in the chemical process industry. The addition of molybdenum increases general corrosion resistance, improves chloride pitting resistance and strengthens the alloy in high temperature service. Through the controlled addition of nitrogen it is common for 316/316L to meet the mechanical properties of 316 straight grade, while maintaining a low carbon content.

Chemistry
Ni Cr Mo Mn Si C S P N Fe
MIN 10.0 16.0 2.0 - - - - - - -
MAX 14.0 18.0 3.0 2.0 0.75 0.03 0.03 0.045 0.1 Balance

Physical Properties

Density:0.285 lb/inch3
Poisson's Ratio:0.3
Electrical Resistivity:445 Ohm-circ mil/ft

Temperature, °F 70 212 932 1832
Coefficient* of Thermal Expansion, in/in°F x 10-6 - 9.2 10.1 10.8
Thermal Conductivity Btu • ft/ft2 • hr • °F 7.8 - - -
Modulus of Elasticity Dynamic, psi x 106 29 - - -
Mechanical Properties

Representative Tensile Properties

Ultimate Tensile Strength, ksi 75
0.2% Yield Strength, ksi 30
Elongation, % 40
Hardness MAX, Brinell 217

Typical Tensile and Impact Properties

Temperature, °F 70 200 400 600 800 1000 1200 1400
Ultimate Tensile Strength, ksi 82.4 75.6 71.1 71.1 71.1 68.4 50.7 30.7
0.2 % Yield Strength, ksi 42.4 - - - 26.5 23.4 22.6 -
夏比冲击述评,英尺-磅 65 - 100 - - - - - - -
304 / 304L

304 is the original "18-8" stainless. It is produced in greater quantity than any other austenitic stainless steel. 304 provides useful resistance to corrosion in many environments ranging from moderately reducing to moderately oxidizing. Through the controlled addition of nitrogen, it is common for 304L to meet the mechanical properties of 304 straight grade. As a result, most products are dual certified as 304 and 304/304L.

Chemistry
Ni Cr Mn Si C S P N Fe
MIN 8.0 18.0 - - - - - - -
MAX 10.5 20.0 2.0 0.75 0.03 0.03 0.045 0.10 Balance
Inventory

304 / 304L Coil, 304 / 304L Fittings, 304 / 304L Flanges, 304 / 304L Hex Bar, 304 / 304L Pipe, 304 / 304L Plate, 304 / 304L Sheet, 304 / 304L Stub Ends, 304 / 304L Tees, 304 / 304L Tubing, 304 / 304L Weld Wire

Common Trade Names
304 Stainless, 304L Stainless
Features
  • Good general corrosion resistance
  • Ease of cleaning
  • Excellent strength and toughness at cryogenic temperatures
  • Good formability
  • Good weldability
Applications
  • Food processing and handling
  • Heat exchangers
  • Chemical process vessels
  • Conveyors
  • Architectural

Physical Properties

Density:0.285 lb/inch3
Melting Range:2550-2590°F
Poisson's Ration:0.3
Electrical Resistivity:433Ohm-circ mil/ft

Temperature, °F 70 212 932
Coefficient* of Thermal Expansion, in/in°F x 10-6 - 9.2 -
Thermal Conductivity Btu • ft/ft2 • hr • °F - 9.4 12.4
Modulus of Elasticity Dynamic, psi x 106 29 - -

* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties

Ultimate Tensile Strength, ksi 75
0.2% Yield Strength, ksi 30
Elongation, % 40
Hardness MAX, Brinell 201


Typical Tensile and Impact Properties

Temperature, °F -425 -320 -100 70 400 800 1200
Ultimate Tensile Strength, ksi 250 230 150 90 70 66 48
0.2 % Yield Strength, ksi 100 70 50 35 23 19 15.5
夏比冲击述评,英尺-磅 85 85 - 150 - - -
Alloy Steel Flange
Our manufacturing arena is well known in the market that comprises of various flanges one of which is Alloy Steel flanges. They are available in variety such as weld neck, Deck flange, lap joint etc. They are made of steel and other metals thereby forming an alloy. These flanges have undergone stringent quality check and have been certified by national authorities.
Chemical Requirements (Composition, %, max)
Material Symbol C Mn P S Si Ni Cr Mo Cu N V Co
ASTM A105 0.35 0.60 - -1.05 0.035 0.040 0.10-0.35 0.40 0.30 0.12 0.40 _ 0.08 _
ASTM A350 LF2 0.30 0.60-1.35 0.035 0.040 0.15-0.30 0.40 0.30 0.12 0.40 _ 0.08 0.02
ASTM A182 F304 0.08 2.00 0.045 0.030 1.00 8.0-11.0 18.0-20.0 _ _ _ _ _
ASTM A182 F304L 0.03 2.00 0.045 0.030 1.00 8.0-13.0 18.0-20.0 _ _ _ _ _
ASTM A182 F316 0.08 2.00 0.045 0.030 1.00 10.0-14.0 16.0-18.0 2.00-3.00 _ _ _ _
ASTM A182 F316L 0.03 2.00 0.045 0.030 1.00 10.0-15.0 16.0-18.0 2.00-3.00 _ _ _ _
ASTM A182 F321 0.08 2.00 0.045 0.030 1.00 9.0-12.0 17.0-19.0 _ _ _ _ _
EN 10025 S235JR 0.20 1.40 0.045 0.045 _ _ _ _ _ 0.009 _ _
20Mn 0.17-0.23 0.70-1.00 0.035 0.035 0.17-0.37 0.30 0.25 0.25
20 0.17-0.23 0.60-1.00 0.030 0.020 0.17-0.37 0.25 0.25 0.25
16Mn 0.13-0.19 1.20-1.60 0.030 0.020 0.20-0.60 0.30 0.30 0.25
Mechanical Requirements
Material Symbol Tensile Strength, min, MPa Yield point, min, Mpa Elongation, min, % Reduction of area, min, % Hardness, max, HB Min. Impact
Average, J		 Test Temperature, °C
ASTM A105 485 250 22 30 187
ASTM A350 LF2 485-655 250 22 30 20 -46
ASTM A182 F304 515 205 30 50
ASTM A182 F304L 485 170 30 50
ASTM A182 F316 515 205 30 50
ASTM A182 F316L 485 170 30 50
ASTM A182 F321 515 205 30 50
20Mn 450 275 24 50 197
20 410 245 25 55 156

Related flange

Requirements are valid for normal case, in special case you have to contact the technical department.

Slip-On Flanges, SO Flange
Common flange types
Specialty flange
Specialty flange
150LB Carbon steel forged flange
Material Grades

Flanges specification, Standard and identification

Below you will find a short description and definition of each type, completed with an detailed image.