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Seamless steel tubes in small calibers for high(low and medium) Pressure boilers and pe... |
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| 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％ |
|
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 < |
Contact : Sum Xuu, 862133780199
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