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BS 3059:Part2

Boiler tube:

Standard: British Standard BS 3059:Part 2 Steel boiler and superheater tubes
Uses: Specification for carbon,alloy and austenitic stainless steel tubes with specified elevated temperature properties.
Steel type and Type number:

Steel type

Type number

Carbon

360

Carbon manganese

440

0.3%Molybdenum

243

1%Chromium,0.5%Molybdenum

620-460

2.25%Chromium, 1%Molybdenum(normalized and tempered)

622-490

9%Chromium,1%Molybdenum(annealed)

629-470

9%Chromium,1%Molybdenum(normalized and tempered)

629-590

12%Chromium,1%Molybdenum,vanadium

762


Chemical Composition(%): 

Grade

C

Si

Mn

P

S

Cr

Mo

Ni

Other

360

=0.17

0.10~0.35

0.40~0.8

=0.035

=0.035

-

-

-

-

440

0.12~0.18

0.10~0.35

0.90~1.2

=0.035

=0.035

-

-

-

-

243

0.12~0.2

0.10~0.35

0.40~0.8

=0.035

=0.035

-

0.25~0.35

-

Al=0.012

620-460

0.10~0.15

0.10~0.35

0.40~0.7

=0.030

=0.030

0.70~1.10

0.45~0.65

-

Al=0.02

622-490

0.08~0.15

=0.50

0.40~0.7

=0.030

=0.030

2.00~2.50

0.90~1.2

-

Al=0.02

629-470

=0.15

0.25~1

0.3~0.6

=0.030

=0.030

8~10

0.9~1.1

-

Al=0.02

629-590

762

0.17~0.23

=0.50

=1.00

=0.030

=0.030

10.00~12.5

0.80~1.2

0.30~0.8

V 0.25~0.35

Mechanical Properties:
Grade

Tensile Strength (MPa)

Yield Strength (Mpa Min)

Elongation (% Min)

Flatten Coefficient

360

360~500

235

24

0.1

440

440~580

245

21

0.07

243

480~630

275

22

0.07

620~460

460~610

180

22

0.07

622~490

490~640

275

20

0.07

629~470

470~620

185

20

0.07

629~590

590~740

400

18

0.07

762

720~870

470

15

0.08


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