Loading Port:Shanghai
Payment Terms:TT OR LC
Min Order Qty:2000 m.t.
Supply Capability:10000 m.t./month
Standards：
GB，_r81 62 Chinese national standard
ASTM A53 Standard of American Society of Testing Materials
ASME SA53 Boiler and pressure vessel--c-Ojrde of ASME
Application：
Seamless steel tubes for manufacturing pipelines。vessels，equipment and mechanical structures
Models of major steeI tubes：
1 O，20，35、45，Q345，1 5CrMo，1 2Crl MoV,A53A，A53B，SA53A，SA53B, etc．
Diamensional tolerances:
Types of steel tubes | Outer diameter | Wall thickness | ||
Cold-rolled tubes | Tube sizes(mm) | Tolerances(mm) | Tube sizes (mm) | Tolerances(mm) |
＞30～50 | ±0.3 | ≤30 | ±10％ | |
＞50～219 | ±0.8％ | |||
Hot-rolled tubes | ＞219 | ±1.0％ | ＞20 | ±10％ |
Mechanical properties：
Standard codes | Models of steel tubes | Tensite strength（MPa） | Yield strength（MPa） | Elongation（％） |
GB/T8162 | 10 | ≥335 | ≥205 | ≥24 |
20 | ≥390 | ≥245 | ≥20 | |
35 | ≥510 | ≥305 | ≥17 | |
45 | ≥590 | ≥335 | ≥14 | |
Q345 | ≥490 | ≥325 | ≥21 | |
15CrMo | ≥440 | ≥295 | ≥22 | |
12Cr1MoV | ≥490 | ≥245 | ≥22 | |
ASTM A53 ASME SA53 | A | ≥330 | ≥205 | Check the table in ASTM A 53 |
B | ≥415 | ≥240 |
Chemical composition:
Standard codes | Models of steel tubes | Chemical compositions（％） | |||||||||
C | Si | Mn | P | S | Cu | Ni | Mo | Cr | V | ||
GB/T8162 | 10 | 0.07～0.14 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.15 | / |
20 | 0.17～0.24 | 0.17～0.37 | 0.35～0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | / | |
35 | 0.32～0.40 | 0.17～0.37 | 0.50～0.80 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | / | |
45 | 0.42～0.50 | 0.17～0.37 | 0.50～0.80 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | / | |
Q345 | 0.12～0.20 | 0.20～0.55 | 1.20～1.60 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 | / | ≤0.25 | / | |
15CrMo | 0.12～0.18 | 0.17～0.37 | 0.40～0.70 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | 0.40～0.55 | 0.80～1.10 | / | |
12Cr1MoV | 0.08～0.15 | 0.17～0.37 | 0.40～0.70 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | 0.25～0.35 | 0.90～1.20 | 0.15～0.30 | |
ASTMA53 ASMESA53 | A | ≤0.25 | / | ≤0.95 | ≤0.05 | ≤0.06 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.08 |
B | ≤0.30 | / | ≤1.20 | ≤0.05 | ≤0.06 | ≤0.40 | ≤0.40 | ≤0.15 | ≤0.40 | ≤0.08 | |
