Seamless steel tubes in large calibers for high(low and medium) pressure boilers and petrochemical industry
Standards：
GB3087 Chinese national standard 
GB5310 Chinese national standard
ASME SA106 Boiler and pressure vessel code of ASME
ASME SA333 Boiler and pressure vessel code of ASME
ASME SA335 Boiler and pressure vessel code of ASME
DIN17175 Deutsches industrial standard
EN10216-2 European standard for pressure pipes
Application：
For boilers and pressure vessels of medium and low pressures(normally,the cintainer and steam pipelines With the operating pressure not higher than 5.88Mpa，operating temperature below 450℃);for high-pressure boilers(normally，the cintainers，steam pipelines and petrochemical pipelines with the operating pressure not higher than 9.8Mpa．operating temperature between 450℃-650℃)．
Model No.of major steel tubes：
10,20,20G,20MnG,25MnG,15CrMoG,12Cr2MoG,12Cr1MoVG,10Cr9Mo1VNb,SA106B,SA106C,SA333 grade I,SA333 gradeⅥ,SA335 Ps,SA335 P11,SA335 P12,SA335P22,SA335 Pm91,SA335 P92,ST45.8/Ⅲ,15Mo3，13CrMo44,10CrMo910,15NiCuMoNb5-6-4．etc．
Diamensional tolerances:
|
Types of steel tubes
|
Outer diameters
|
Wall thickness
|
|
Cold-rolled tubes
|
Tube sizes(mm)
|
Tolerances(mm)
|
Tube sizes (mm)
|
Tolerances(mm)
|
|
＞114～159
|
±0.8％
|
≤30
|
±10％
|
|
＞159～219
|
±1.0％
|
|
Hot-rolled tubes
|
＞219～457
|
±1.0％
|
≤20
|
－10％，＋12.5％
|
|
＞20～40
|
－10％，＋10％
|
|
＞457～1066
|
±0.9％
|
＞40～70
|
－7％，＋9％
|
|
＞70～120
|
－6％，＋8％
|
Mechanical properties：
|
Standard codes
|
Models of steel tubes
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Tensite strength（MPa）
|
Yield strength（MPa）
|
Elongation（％）
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Absorbed-in-fracture energy（J）
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Hardness
|
|
GB3087
|
10
|
335～475
|
≥195
|
≥24
|
|
/
|
|
20
|
410～550
|
≥245
|
≥20
|
|
/
|
|
GB5310
|
20G
|
410～550
|
≥245
|
≥24
|
≥35
|
/
|
|
20MnG
|
≥415
|
≥240
|
≥22
|
≥35
|
/
|
|
25MnG
|
≥485
|
≥275
|
≥20
|
≥35
|
/
|
|
15CrMoG
|
440～640
|
≥235
|
≥21
|
≥35
|
/
|
|
12Cr2MoG
|
450～600
|
≥280
|
≥20
|
≥35
|
/
|
|
12Cr1MoVG
|
470～640
|
≥255
|
≥21
|
≥35
|
/
|
|
10Cr9Mo1VNb
|
≥585
|
≥415
|
≥20
|
≥35
|
/
|
|
ASME SA106
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SA106B
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≥415
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≥240
|
≥22
|
≥35
|
/
|
|
SA106C
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≥485
|
≥275
|
≥20
|
≥35
|
/
|
|
ASME SA333
|
SA333Ⅰ级
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≥380
|
≥205
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≥28
|
－45℃ ≥18
|
/
|
|
SA333Ⅵ级
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≥415
|
≥240
|
≥22
|
－45℃ ≥18
|
/
|
|
ASME SA335
|
SA335 P11
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≥415
|
≥205
|
≥22
|
≥35
|
≤163HB
|
|
SA335 P12
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≥415
|
≥220
|
≥22
|
≥35
|
≤163HB
|
|
SA335 P22
|
≥415
|
≥205
|
≥22
|
≥35
|
≤163HB
|
|
SA335 P5
|
≥415
|
≥205
|
≥22
|
≥35
|
≤187HB
|
|
SA335 P91
|
585～760
|
≥415
|
≥20
|
≥35
|
≤250HB
|
|
SA335 P92
|
≥620
|
≥440
|
≥20
|
≥35
|
250HB
|
|
DIN17175
|
ST45.8/Ⅲ
|
410～530
|
≥255
|
≥21
|
≥27(DVM)
|
/
|
|
15Mo3
|
450～600
|
≥270
|
≥22
|
≥34(DVM)
|
/
|
|
13CrMo44
|
440～590
|
≥290
|
≥22
|
≥34(DVM)
|
/
|
|
10CrMo910
|
480～630
|
≥280
|
≥20
|
≥34(DVM)
|
/
|
|
EN10216-2
|
15NiCuMoNb5-6-4 (WB36)
|
610～780
|
≥440
|
≥19
|
≥40
|
/
|
Chemical composition:
|
|
|
Chemical compositions（％）
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|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Cu
|
Ni
|
V
|
Al
|
W
|
Nb
|
N
|
|
GB3087
|
10
|
0.07～0.13
|
0.17～0.37
|
0.38～0.65
|
≤0.030
|
≤0.030
|
0.3～0.65
|
/
|
≤0.25
|
≤0.30
|
/
|
/
|
|
|
|
|
20
|
0.17～0.23
|
0.17～0.37
|
0.38～0.65
|
≤0.030
|
≤0.030
|
0.3～0.65
|
/
|
≤0.25
|
≤0.30
|
/
|
/
|
|
|
|
|
GB5310
|
20G
|
0.17～0.24
|
0.17～0.37
|
0.35～0.65
|
≤0.030
|
≤0.030
|
≤0.25
|
≤0.15
|
≤0.20
|
≤0.25
|
≤0.08
|
|
|
|
|
|
20MnG
|
0.17～0.25
|
0.17～0.37
|
0.70～1.00
|
≤0.030
|
≤0.030
|
≤0.25
|
≤0.15
|
≤0.20
|
≤0.25
|
≤0.08
|
|
|
|
|
|
25MnG
|
0.23～0.27
|
0.17～0.37
|
0.70～1.00
|
≤0.030
|
≤0.030
|
≤0.25
|
≤0.15
|
≤0.20
|
≤0.25
|
≤0.08
|
|
|
|
|
|
15CrMo
|
0.12～0.18
|
0.17～0.37
|
0.40～0.70
|
≤0.030
|
≤0.030
|
0.80～1.10
|
0.40～0.55
|
≤0.20
|
≤0.30
|
|
|
|
|
|
|
12Cr2MoG
|
0.08～0.15
|
≤0.50
|
0.40～0.70
|
≤0.030
|
≤0.030
|
2.00～2.50
|
0.90～1.20
|
≤0.20
|
≤0.30
|
|
|
|
|
|
|
12Cr1MoV
|
0.08～0.15
|
0.17～0.37
|
0.40～0.70
|
≤0.030
|
≤0.030
|
0.90～1.20
|
0.25～0.35
|
≤0.20
|
≤0.30
|
0.15～0.30
|
|
|
|
|
|
10Cr9Mo1VNb
|
0.08～0.12
|
0.20～0.50
|
0.30～0.60
|
≤0.020
|
≤0.010
|
8.00～9.50
|
0.85～1.05
|
≤0.20
|
≤0.40
|
0.18～0.25
|
≤0.015
|
|
0.06～0.10
|
0.03～0.07
|
|
ASME SA106
|
SA106B
|
0.17～0.25
|
≥0.1
|
0.70～1.00
|
≤0.030
|
≤0.030
|
|
|
|
|
|
|
|
|
|
|
SA106C
|
0.23～0.27
|
≥0.1
|
0.70～1.00
|
≤0.030
|
≤0.030
|
|
|
|
|
|
|
|
|
|
|
ASME SA333
|
SA333Ⅰ级
|
0.09～0.12
|
/
|
0.7～1.00
|
≤0.020
|
≤0.010
|
|
|
|
|
|
|
|
|
|
|
SA333Ⅵ级
|
0.09～0.12
|
≥0.1
|
0.9～1.10
|
≤0.020
|
≤0.010
|
|
|
|
|
|
|
|
|
|
|
ASME SA335
|
SA335 P11
|
0.05～0.15
|
0.50～1.0
|
0.30～0.60
|
≤0.030
|
≤0.030
|
1.00～1.50
|
0.50～1.00
|
|
|
|
|
|
|
|
|
SA335 P12
|
0.05～0.15
|
≤0.50
|
0.30～0.61
|
≤0.030
|
≤0.030
|
0.80～1.25
|
0.44～0.65
|
|
|
|
|
|
|
|
|
SA335 P22
|
0.05～0.15
|
≤0.50
|
0.30～0.60
|
≤0.030
|
≤0.030
|
1.90～2.60
|
0.87～1.13
|
|
|
|
|
|
|
|
|
SA335 P5
|
≤0.15
|
≤0.50
|
0.30～0.60
|
≤0.030
|
≤0.030
|
4.00/6.00
|
0.45/0.65
|
|
|
|
|
|
|
|
|
SA335 P91
|
0.08～0.12
|
0.20～0.50
|
0.30～0.60
|
≤0.020
|
≤0.010
|
8.00～9.50
|
0.85～1.05
|
|
≤0.40
|
0.18～0.25
|
≤0.015
|
|
0.06～0.10
|
0.03～0.07
|
|
SA335 P92
|
0.07～0.13
|
≤0.50
|
0.30～0.60
|
≤0.020
|
≤0.010
|
8.50～9.50
|
0.30～0.60
|
B0.0010.006
|
≤0.40
|
0.15～0.25
|
≤0.015
|
1.50～2.00
|
0.04～0.09
|
0.03～0.07
|
|
DIN 17175
|
ST45.8/Ⅲ
|
≤0.21
|
0.10～0.35
|
0.40～1.20
|
≤0.040
|
≤0.040
|
≤0.30
|
|
|
|
|
|
|
|
|
|
15Mo3
|
0.12～0.20
|
0.10～0.35
|
0.40～0.80
|
≤0.035
|
≤0.035
|
|
0.25～0.35
|
|
|
|
|
|
|
|
|
13CrMo44
|
0.10～0.18
|
0.10～0.35
|
0.40～0.70
|
≤0.035
|
≤0.035
|
0.70～1.10
|
0.45～0.65
|
|
|
|
|
|
|
|
|
10CrMo910
|
0.08～0.15
|
≤0.50
|
0.30～0.70
|
≤0.025
|
≤0.020
|
2.00～2.50
|
0.90～1.10
|
≤0.30
|
≤0.30
|
|
≤0.015
|
|
|
|
|
EN1021 6-2
|
15NiCuMoNb5-6-4 (WB36)
|
≤0.17
|
0.25～0.50
|
0.80～1.20
|
≤0.025
|
≤0.020
|
≤0.30
|
0.25～0.50
|
0.50～0.80
|
1.00～1.30
|
|
≤0.05
|
|
0.015～0.045
|
|
