Flanges General - Materials ASTM

2/28/13 Flanges General - Materials ASTM -

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Definition and Details of Flanges - Materials -

ASTM Grades

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.

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".

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..

Chemical requirements composition, %

Grade F304 (A) Grade F304L (A) Grade F316L (A-B)

Carbon, max 0.08 0.035 0.035

Manganese, max 2.00 2.00 2.00

Phosphorus, max 0.045 0.045 0.045

Sulfur, max 0.030 0.030 0.030

Silicon, max 1.00 1.00 1.00

Nickel 8 - 11 8 - 13 10 - 15

Chrome 18 - 20 18 - 20 16 - 18

Molybdenum - - 2.00-3.00

(A) Carbon 0.040% max. is necessary where many drawing passes are required, as with outsidediameter <0.5 inch (12.7 mm), or nominal wall thickness <0.049 inch (1.2 mm).

(B) On pierced tube, Nickel may be 11 - 16.00%.

ASTM Grades

Material Pipes Fittings Flanges Valves Bolts & Nuts

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Carbon Steel A106 Gr A A234 Gr WPA A105 A216 Gr WCB A193 Gr B7

A194 Gr 2HA106 Gr B A234 Gr WPB A105 A216 Gr WCB

A106 Gr C A234 Gr WPC A105 A216 Gr WCB

Carbon Steel

Alloy

High-Temp

A335 Gr P1 A234 Gr WP1 A182 Gr F1 A217 Gr WC1 A193 Gr B7

A194 Gr 2HA335 Gr P11 A234 Gr WP11 A182 Gr F11 A217 Gr WC6

A335 Gr P12 A234 Gr WP12 A182 Gr F12 A217 Gr WC6

A335 Gr P22 A234 Gr WP22 A182 Gr F22 A217 Gr WC9

A335 Gr P5 A234 Gr WP5 A182 Gr F5 A217 Gr C5

A335 Gr P9 A234 Gr WP9 A182 Gr F9 A217 Gr C12

Carbon Steel

Alloy

Low-Temp

A333 GR 6 A420 Gr WPL6 A350 Gr LF2 A352 Gr LCB A320 Gr L7

A194 Gr 7A333 Gr 3 A420 Gr WPL3 A350 Gr LF3 A352 Gr LC3

Austenitic

Stainless

Steel

A312 Gr TP304 A403 Gr WP304 A182 Gr F304 A182 Gr F304 A193 Gr B8

A194 Gr 8A312 Gr TP316 A403 Gr WP316 A182 Gr F316 A182 Gr F316

A312 Gr TP321 A403 Gr WP321 A182 Gr F321 A182 Gr F321

A312 Gr TP347 A403 Gr WP347 A182 Gr F347 A182 Gr F347

ASTM Materials

Pipes

A106 = This specification covers carbon steel pipe for high-temperature service.

A335 = This specification covers seamless ferritic alloy-steel pipe for high-temperature service.

A333 = This specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures.

A312 = Standard specification for seamless, straight-seam welded, and cold worked welded austenitic stainless steel pipe

intended for high-temperature and general corrosive service.

Fittings

A234 = This specification covers wrought carbon steel and alloy steel fittings of seamless and welded construction.

A420 = Standard specification for piping fittings of wrought carbon steel and alloy steel for low-temperature service.

A403 = Standard specification for wrought austenitic stainless steel piping fittings.

Flanges

A105 = This specification covers standards for forged carbon steel piping components, that is, flanges, fittings, Valves, and similar

parts, for use in pressure systems at ambient and higher-temperature service conditions.

A182 = This specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and Valves and parts for

high-temperature service.

A350 = This specification covers several grades of carbon and low alloy steel forged or ring-rolled flanges, forged fittings and

Valves for low-temperature service.

Valves

A216 = This specification covers carbon steel castings for Valves, flanges, fittings, or other pressure-containing parts for high-

temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.

A217 = This specification covers steel castings, martensitic stainless steel and alloys steel castings for Valves, flanges, fittings,

and other pressure-containing parts intended primarily for high-temperature and corrosive service.

A352 = This specification covers steel castings for Valves, flanges, fittings, and other pressure-containing parts intended primarily



for low-temperature service.

A182 = This specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and Valves and parts for

high-temperature service.

Bolds & Nuts

A193 = This specification covers alloy and stainless steel bolting material for pressure vessels, Valves, flanges, and fittings for

high temperature or high pressure service, or other special purpose applications.

A320 = Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for Low-Temperature Service.

A194 = Standard specification for nuts in many different material types.

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Flanges General - Materials ASTM