A268 Specification for seamless and welded Ferritic/Martensitic stainless steel tubing for General Service

Item

Contents

Requirements

1

Materail

TP409, TP409L, TP430, TP439,TP410, TP441, TP444 Etc

2

Welding Method

TIG

3

ChemicalComposition

Acc.to A268 and A480

4

Heat Treatment

Bright Annealing Or Not Annealing,Which Depends on Buyer

5

Straightness

Acc.to the buyer\'s requirements

6

Tolerance

Acc.to A268

7

Mechanical Property

Tension Test, Hardness Test, Hydrostatic or Other Nondestructive Test Depends on Buyer

Grade

TP405

TP410

TP429

TP430

TP443

TP446–1

TP446–2A

. . .

TP409

UNS Designation

S40500

S41000

S42900

S43000

S44300

S44600

S44600

S40800

S40900

Element

Composition, %

C, max

0.08

0.15

0.12

0.12

0.2

0.2

0.12

0.08

0.08

Mn, max

1

1

1

1

1

1.5

1.5

1

1

P, max

0.04

0.04

0.04

0.04

0.04

0.04

0.04

0.045

0.045

S, max

0.03

0.03

0.03

0.03

0.03

0.03

0.03

0.045

0.03

Si, max

1

1

1

1

1

1

1

1

1

Ni

0.50 max

. . .

. . .

. . .

0.75 max

0.75 max

0.50 max

0.80 max

0.50 max

Cr

11.5–14.5