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ASTM A334/A334M

Date:2022-11-23View:242Tags:SSAW steel pipe,LSAW steel pipe,Epoxy pipe

ASTM A334/A334M Standard Specification for Seamless and Welded Carbon and Alloy-Steel Tubes for Low-Temperature Service.This specification 2 covers several grades of minimum-wall-thickness, seamless and welded, carbon and alloy-steel tubes intended for use at low temperatures. Some product sizes may not be available under this specification because heavier.


Chemical Composition

Element

Composition, %

Grade 1A

Grade 3

Grade 6A

Grade 7

Grade 8

Grade 9

Grade 11

Carbon, max

0.30

0.19

0.30

0.19

0.13

0.20

0.10

Manganese

0.40-1.06

0.31-0.64

0.29-1.06

0.90 max

0.90 max

0.40-1.06

0.60 max

Phosphorus, max

0.025

0.025

0.025

0.025

0.025

0.025

0.025

Sulfur, max

0.025

0.025

0.025

0.025

0.025

0.025

0.025

Silicon


0.18-0.37

0.10 min

0.13-0.32

0.13-0.32


0.35 max

Nickel


3.18-3.82


2.03-2.57

8.40-9.60

1.60-2.24

35.0-37.0

Chromium







0.50 max

Copper






0.75-1.25


Cobalt







0.50 max

Molybdenum







0.50 max

For each reduction of 0.01 % carbon below 0.30 %, an increase of 0.05 % manganese above 1.06 % will be permitted to a maximum of 1.35 % manganese.


Mechanical Properties

Mechanical Properties

Grade 1

Grade3

Grade 6

Grade 7

Grade 8

Grade 9

Grade 11

Mpa

Mpa

Mpa

Mpa

Mpa

Mpa

Mpa

Tensile Strength (min)

380

450

415

450

690

435

450

Yield Strength(min)

205

240

240

240

520

315

240

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