Low medium tubes are used as the pipes on the heated side of low and medium pressure boilers(normally with operating pressure not higher than 5．88Mpa)
Seamless steel tubes in small calibers for high(low and medium) Pressure boilers and petro chemical industry
Main Steel Pipe Model
10, 20, 20G, 20MnG, 25MnG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, SA210A1, SA210C, SA213 T11, SA213 T12, SA213 T22, SA213 T23, SA213 T91, SA213 T92, ST45.8/Ⅲ, 15Mo3, 13CrMo44, 10CrMo910etc.
Main Steel Pipe Model
10, 20, 20G, 20MnG, 25MnG, 15CrMoG, 12Cr2MoG, 12Cr1MoVG, 12Cr2MoWVTiB, 10Cr9Mo1VNb, SA210A1, SA210C, SA213 T11, SA213 T12, SA213 T22, SA213 T23, SA213 T91, SA213 T92, ST45.8/Ⅲ, 15Mo3, 13CrMo44, 10CrMo910etc.
Standard Size
GB3087 Chinese national standard
GB5310 Chinese national standard
ASME SA210 Boiler and pressure vessel code of ASME
ASME SA213 Boiler and pressure vessel code of ASME
DINl7175 Deutsches industrial standard~
GB3087 Chinese national standard
GB5310 Chinese national standard
ASME SA210 Boiler and pressure vessel code of ASME
ASME SA213 Boiler and pressure vessel code of ASME
DINl7175 Deutsches industrial standard~
Diamensional tolerances:
| Types of steel tubes | Outer diameters | Wall thickness | ||
| Cold-rolled tubes | Tube sizes(mm) | Tolerances(mm) | Tube sizes (mm) | Tolerances(mm) |
| >30～50 | ±0.3 | >3～20 | ±10％ | |
Application
Used as the pipes on the heated side of low and medium pressure boilers(normally with operating pressure not higher than 5．88Mpa and operating temperature below 450 oC), as the pipes on the heated sides of high·pressure boilers, economizers, overheaters, reheaters and pipes for petrochemical industry(with the operating pressure above 9．8Mpa and operating temperature ranging between 450C-650C1
Used as the pipes on the heated side of low and medium pressure boilers(normally with operating pressure not higher than 5．88Mpa and operating temperature below 450 oC), as the pipes on the heated sides of high·pressure boilers, economizers, overheaters, reheaters and pipes for petrochemical industry(with the operating pressure above 9．8Mpa and operating temperature ranging between 450C-650C1
Mechanical properties:
Standard codes
|
Models of steel tubes
|
Tensite strength（MPa）
| Yield strength（MPa） |
Elongation（％）
|
Hardness
|
| GB3087 | 10 | 335～475 | ≥195 | ≥24 | / |
| 20 | 410～550 | ≥245 | ≥20 | / | |
| GB5310 | 20G | 410～550 | ≥245 | ≥24 | / |
| 20MnG | ≥415 | ≥240 | ≥22 | / | |
| 25MnG | ≥485 | ≥275 | ≥20 | / | |
| 15CrMoG | 440～640 | ≥235 | ≥21 | / | |
| 12Cr2MoG | 450～600 | ≥280 | ≥20 | / | |
| 12Cr1MoVG | 470～640 | ≥255 | ≥21 | / | |
| 12Cr2MoWVTiB | 540～735 | ≥345 | ≥18 | / | |
| 10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 | / | |
| ASME SA210 | SA210A-1 | ≥415 | ≥255 | ≥30 | ≤143HB |
| SA210C | ≥485 | ≥275 | ≥30 | ≤179HB | |
| ASME SA213 | SA213 T11 | ≥415 | ≥205 | ≥30 | ≤163HB |
| SA213 T12 | ≥415 | ≥220 | ≥30 | ≤163HB | |
| SA213 T22 | ≥415 | ≥205 | ≥30 | ≤163HB | |
| SA213 T23 | ≥510 | ≥400 | ≥20 | ≤220HB | |
| SA213 T91 | ≥585 | ≥415 | ≥20 | ≤250HB | |
| SA213 T92 | ≥620 | ≥440 | ≥20 | ≤250HB | |
| DIN17175 | ST45.8/Ⅲ | 410～530 | ≥255 | ≥21 | / |
| 15Mo3 | 450～600 | ≥270 | ≥22 | / | |
| 13CrMo44 | 440～590 | ≥290 | ≥22 | / | |
| 10CrMo910 | 480～630 | ≥280 | ≥20 | / |
Chemical composition:
Standard codes
|
Models of steel tubes
|
Chemical compositions (%)
| ||||||||||||||
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
Cu
|
Ni
|
V
|
Al
|
W
|
Ti
|
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
|
0.17～0.24
|
0.17～0.37
|
0.70～1.00
|
≤0.030
|
≤0.030
|
≤0.25
|
≤0.15
|
≤0.20
|
≤0.25
|
≤0.08
| ||||||
25MnG
|
0.18～0.24
|
0.17～0.37
|
0.80～1.10
|
≤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
| ||||||
12Cr2MoWVTiB
|
0.08～0.15
|
0.45～0.75
|
0.45～0.65
|
≤0.030
|
≤0.030
|
1.60～2.10
|
0.50～0.65
|
≤0.20
|
≤0.30
|
0.28～0.42
|
0.30～0.55
|
0.08～0.15
|
B 0.002～0.008
| |||
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 SA210
|
SA210A-1
|
0.13～0.19
|
≥0.1
|
0.45～0.65
|
≤0.030
|
≤0.030
| ||||||||||
SA210C
|
0.18～0.24
|
≥0.1
|
0.80～1.10
|
≤0.030
|
≤0.030
| |||||||||||
ASME SA213
|
SA213 T11
|
0.05～0.15
|
0.50～1.0
|
0.30～0.60
|
≤0.030
|
≤0.030
|
1.00～1.50
|
0.50～1.00
| ||||||||
SA213 T12
|
0.05～0.15
|
≤0.50
|
0.30～0.61
|
≤0.030
|
≤0.030
|
0.80～1.25
|
0.44～0.65
| |||||||||
SA213 T22
|
0.05～0.15
|
≤0.50
|
0.30～0.60
|
≤0.030
|
≤0.010
|
1.90～2.60
|
0.87～1.13
| |||||||||
SA213 T23
|
0.04～0.10
|
≤0.50
|
0.10～0.60
|
≤0.030
|
≤0.030
|
1.90～2.60
|
0.05～0.30
|
≤0.030
|
1.45～1.75
|
B0.0005～0.006
|
0.02～0.08
|
≤0.040
| ||||
SA213 T91
|
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
| ||||
SA213 T92
|
0.07～0.13
|
≤0.50
|
0.30～0.60
|
≤0.020
|
≤0.010
|
8.50～9.50
|
0.30～0.60
|
≤0.40
|
0.15～0.25
|
≤0.015
|
1.50～2.00
|
B 0.001～0.006
|
0.04～0.09
|
0.03～0.07
| ||
ST45.8/Ⅲ
|
≤0.21
|
0.10～0.35
|
0.40～1.20
|
≤0.040
|
≤0.040
| |||||||||||
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
| ||||||
