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Boiler,
Superheater and Heat Exchanger Seamless Ferrite and Austenitic
Alloy Steel Tube
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Standards:
ASTM A213
Applications:
For manufacture of boiler and super heater min wall
thickness seamless steel ferrite and austenitic steel
tubes and heat exchanger austenitic steel tubes.
Size range:
Seamless:6 mm to 114.3mm;WT 1.0mm to
4.5mm.
Material:
T 11,T12,T22,T 91.
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| Chemical
Composition & Mechanical Properties: |
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| Standard |
Material |
Chemical
Composition |
Mechanical
Properties |
C
(%) |
Si
(%) |
Mn
(%) |
P
(%) |
S
(%) |
Cr
(%) |
Mo
(%) |
Ni |
Tensile
(MPa) |
Yield
(MPa) |
Elongation
(%) |
ASTM
A 213 |
T11 |
0.05~0.15 |
0.50~1.00 |
0.30~0.60 |
≤0.025 |
≤0.025 |
1.00~1.50 |
0.44~0.65 |
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≥415 |
≥170 |
≥30 |
| T12 |
0.05~0.15 |
≤0.50 |
0.30~0.61 |
≤0.025 |
≤0.025 |
0.80~1.25 |
0.44~0.65 |
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≥415 |
≥205 |
≥30 |
| T22 |
0.05~0.15 |
≤0.50 |
0.30~0.60 |
≤0.025 |
≤0.025 |
1.90~2.60 |
0.87~1.13 |
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≥415 |
≥205 |
≥30 |
| T91 |
0.08~0.12 |
0.20~0.50 |
0.30~0.60 |
≤0.020 |
≤0.010 |
8.0~9.50 |
0.85~1.05 |
≤0.40 |
≥585 |
≥415 |
≥20 |
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Other
compositions and mechanical properties for T91 :
Nb: 0.06～0.10,
V: 0.18～0.25
AL: ≤0.04 N: 0.03～0.07?.
HB≤250.
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