Standard

JIS G3462

JIS G3462 specifies the alloy boiler steel tubes used for exchanging heat on the inside and outside of the tube, with 8 steel grades from STBA12-STBA26, it has the similar application as JIS G3461, steel tube of this specification could be supplied as U tube. However, it is not applicable to the steel tubes for heating furnace and those for heat exchangers of low temperature service. For final product, heat treatment of the bent portion is not usually performed. However, if there is a request from the orderer, agreement on heat treatment


Specification:

OD: 6mm-760mm

WT: 1mm-60mm

Length: 5-12m or as required

Application: Boiler pipe, super heater tube, heat exchanger tube.

Supplementary Technology: plastic pipe cap, hot rolled or cold drawn, tension test, hardness test, flattening test, hydrostatic test,

Surface: Bared or painted, galvanized or with oiled or client option.

Delivery state: Hot Rolled, Cold Drawn

Steel Grade: STBA 12, STBA 13, STBA 20, STBA 22, STBA 23, STBA 24, STBA 25


Chemical Composition:

JIS G3462 Grade

C≤

Si≤

Mn≤

P≤

S≤

Cr

Mo

STBA 12

0.10 ~0.20

0.10~0.50

0.30~0.80

0.035

0.035

-

0.45~0.65

STBA 13

0.15~0.25

0.10~0.50

0.30~0.80

0.035

0.035

-

0.45~0.65

STBA 20

0.10 ~0.20

0.10~0.50

0.30~0.60

0.035

0.035

0.050~0.080

0.45~0.65

STBA 22

0.15

0.50

0.30~0.60

0.035

0.035

0.80~1.25

0.45~0.65

STBA 23

0.15

0.50~1.00

0.30~0.60

0.030

0.030

1.00~1.50

0.45~0.65

STBA 24

0.15

0.50

0.30~0.60

0.030

0.030

1.90~2.60

0.87~1.13

STBA 25

0.15

0.50

0.30~0.60

0.030

0.030

4.00~6.00

0.45~0.65

STBA 26

0.15

0.25~1.00

0.30~0.60

0.030

0.030

8.00~10.00

0.90~1.10


Mechanical Property:

JIS G3462 Grade

Tensile Property (N/mm2)

Yield Point or Yield Strength (N/mm2)

Elongation (%)

OD ≥ 20 mm

10 mm ≤  OD <20 mm

OD <10 mm

NO. 12 Sample

NO. 11 Sample

NO. 11 Sample

Longitudinal

Transverse

Transverse

STBA12

≥ 382

≥ 206

≥ 30

≥ 25

≥ 22

STBA13

≥ 412

≥ 206

≥ 30

≥ 25

≥ 22

STBA20

≥ 412

≥ 206

≥ 30

≥ 25

≥ 22

STBA22

≥ 412

≥ 206

≥ 30

≥ 25

≥ 22

STBA23

≥ 412

≥ 206

≥ 30

≥ 25

≥ 22

STBA24

≥ 412

≥ 206

≥ 30

≥ 25

≥ 22

STBA25

≥ 412

≥ 206

≥ 30

≥ 25

≥ 22

STBA26

≥ 412

≥ 206

≥ 30

≥ 25

≥ 22


Equivalent Steel Grade:

KS

ASTM

JIS

DIN

BS

Grade number

GRADE

Grade number

GRADE

Grade number

GRADE

Grade number

GRADE

Grade number

D 3572

STHA12

A161
A209

T1
T1

G 3462

STBA12

17175

15Mo 3

-

STHA13

A209

T1a

STBA13

-

-

-

-

STHA20

A213

T2

STBA20

-

-

-

-

STHA22

A213

T12

STBA22

17175

13Cr Mo 44

3059

S1 620
S2 620
ERW620
CEW620

STHA23

A199
A200
A213

T11
T11
T11

STBA23

-

-

-

-

STHA24

A199
A200
A213

T22
T22
T22

STBA24

17175

10Cr Mo910

3059

S1 622-440
S2 622-440

STHA25

A199
A200
A210

T5
T5
T5

STBA25

-

-

-

-

STHA26

A199
A200
A213

T9
T9
T9

STBA26

-

-

-

-

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