원활한 탄소 - 몰리브덴 합금 철강 보일러 튜브

STEEL GRADE AND CHEMICAL COMPOSITIONS

Seel Grade

C

Mn

P

S

Si

Mo

T1

0.10-0.20

0.30-0.80

≤0.025

≤0.025

0.10-0.50

0.44-0.65

T1a

0.15-0.25

0.30-0.80

≤0.025

≤0.025

0.10-0.50

0.44-0.65

T1b

≤0.14

0.30-0.80

≤0.025

≤0.025

0.10-0.50

0.44-0.65

Mechanical Properties

Seel Grade

Tensile strength(Mpa)

Yield Strength  (Mpa)

δfixed (Pipe Segment S≥8mm vertical)

δfixed

(S<8mm vertical)

δfixed

(Round brilliant)

T1

≥380

≥205

≥30

See note

≥22

T1a

≥415

≥220

≥30

See note

≥22

T1b

≥365

≥195

≥30

See note

≥22

Note: S<8mm vertical Elongation is the basic value minus 1.5%,per wall thickness minus 0.8mm

HARDNESS

Seel Grade

HB S ≥5.1mm

HRB S≤ 5.1mm

T1

≤146

≤80

T1a

≤153

≤81

T1b

≤137

≤77