ASTM A213/A335 T22/P22 Standard Specification For Seamless Ferritic Alloy-Steel Pipe For High-Temperature Service

ASTM A213/A335 T22/P22 Standard Specification For Seamless Ferritic Alloy-Steel Pipe For High-Temperature Service

This ASTM A213/A335 T22/P22 Standard Specification For Seamless Ferritic Alloy-Steel Pipe For High-Temperature Service has been hydrostatically tested and inspected by non-destructive testing as required. Due to the chemical composition of molybdenum (Mo) and chromium (Cr), A335 is commonly referred to as a chromium molybdenum tube.
Product description

Product description:

This ASTM A213/A335 T22/P22 Standard Specification For Seamless Ferritic Alloy-Steel Pipe For High-Temperature Service has been hydrostatically tested and inspected by non-destructive testing as required. Due to the chemical composition of molybdenum (Mo) and chromium (Cr), A335 is commonly referred to as a chromium molybdenum tube. Molybdenum increases the strength and elastic limit of steel, wear resistance, impact quality and hardenability. The range of ASTM A213/A335 T22/P22 Standard Specification For Seamless Ferritic Alloy-Steel Pipe For High-Temperature Service sizes that we can check by each method should be limited by the scope of the corresponding practice. It is bare-packed/bundled/crate/wooden on both sides and is properly protected for shipping as required.

Inspection and testing:

Chemical composition test, mechanical properties test (tensile strength, yield strength, elongation, flare, flattening, bending, hardness, impact test), surface and dimensional test, non-destructive test, hydrostatic test.

Surface treatment:

Oil immersion, varnish, passivation, phosphating, shot peening.

The ends of each box will indicate the order number, calorie number, size, weight and bundle or as required.

Dimensions: 19.05mm - 1200mm

Wall thickness: 2.0mm - 150 mm

Length: up to 6000-12000mm

Steel grade: ASTM A335 P22

The tube can be hot worked or cold drawn using the finishing heat treatment mentioned below.

Heat treatment

A / N + T.

N + T / Q + T.

N +Ť

Designated mechanical test:

Regarding the transverse or longitudinal tensile test and flattening test of the product, hardness test or bending test

For materials that are heat treated in a batch furnace, 5% of the piping for each treatment batch should be tested. For small batches, at least one pipe should be tested.

For materials heat treated by a continuous process, the test shall be carried out on a sufficient number of pipes to constitute 5% of the batch, but in no case less than 2 pipes

Bend test notes:

For ASTM A213/A335 T22/P22 Standard Specification For Seamless Ferritic Alloy-Steel Pipe For High-Temperature Service with a diameter exceeding NPS 25 and a ratio of diameter to wall thickness of 7.0 or less, a bending test shall be performed instead of the flattening test.

Other tubes having a diameter equal to or exceeding NPS 10 may be subjected to a bending test in place of the flattening test agreed by the purchaser. The bent specimen should be bent 180° at room temperature without cracking on the outside of the curved portion.

Chemical Compositions(%):

Compositions

Data

UNS Designa-tion

K21590

Carbon

0.05-0.15

Manganese

0.30-0.60

Phosphorus(max.)

0.025

Sulfur(max.)

0.025

Silicon

0.50-1.00

Nickel

Chromium

1.90-2.60

Molybdenum

0.87-1.13

Other Elements

Mechanical properties:

Properties

Data

Tensile strength, min, (MPa)

415 Mpa

Yield strength, min, (MPa)

205 Mpa

Elongation, min, (%), L/T

30/20


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