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Eastern Steel Manufacturing Co.,Ltd is a leading manufacturer and distributor of seamless steel pipe, welded steel pipe, OCTG products and fittings. We supply first-step processing, semi-finished parts and finished parts to help our clients meet fabrication requirements beyond their capacity or to improve operations by moving forward the pre-production processing.
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Facility
Eastern Steel Manufacturing Co.,Ltd not only improve product production and sales services, but also provide additional value-added services. As long as you need, we can complete your specific needs together.
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Many years of large-scale project experience in various fields（Oil & Gas, Construction, Power Energy, Marine & Offshore, Water Treatment, Exploration & Drilling Services, Pipeline & Petrochemical etc.）, professional project team is responsible from receiving until the end of the project.
What is low temperature steel pipe ?
Low temperature steel pipe is medium carbon structural steel, cold and hot plus low temperature steel pipe can be good, good mechanical properties, and low price, wide source, so it is widely used. Its biggest weakness is low hardenability, large section size and relatively high requirements of the workpiece should not be used.
Brief introduction
Seamless steel pipes for cryogenic piping
Spot specification:8-1240×1-200mm<1/8"-48"×SCH5S-SCH160、STD、XS、XXS>
product material:10MnDG、09DG、09Mn2VDG、06Ni3MoDG、ASTM A333-Grade1、Grade3、Grade4、Grade6、Grade7、Grade8、Grade9、Grade10、Grade11
Application: It is suitable for seamless steel pipes of -45℃~-195℃ cryogenic pressure vessel pipes and cryogenic heat exchanger pipes
Production process: cold drawing and hot rolling
Weight calculation formula :(outer diameter - wall thickness)* wall thickness *0.02466/1000= m/ton
Heat treating regime
|
Low temperature steel pipe standard |
material mark
|
Heat treatment system of cryogenic steel tubes |
Mechanical properties of cryogenic steel tubes |
||||||
|
σb /MPa |
σs /MPa≥ |
δ5 /%≥ |
HB |
HC |
impulse test |
||||
|
/°C |
/J≥ |
||||||||
|
GB6479 |
10 |
normalizing |
335~490 |
205 |
24 |
-- |
-- |
-20 |
18 |
|
GB6479 |
20 |
normalizing |
410~550 |
245 |
24 |
-- |
-- |
-20 |
18 |
|
GB6479 |
16Mn |
normalizing |
490~670 |
320 |
21 |
-- |
-- |
-40 |
21 |
|
GB5310 |
20G |
Normalizing, hot rolled pipe temperature is not less than 900°C can replace normalizing |
410~550 |
245 |
24 |
-- |
-- |
-20 |
18 |
|
GB150-1998
· Appendix A-A3 |
09MnD |
normalizing |
400~540 |
240 |
26 |
-- |
-- |
-50 Documents'10×10 7.5×10 5×10 |
-- 21 18 14 |
|
GB13296 GB/T14976 |
All austenitic stainless steel seamless and welded tubes |
-- |
-- |
-- |
-- |
-- |
-- |
-196 |
18 |
|
Standard number and main purpose |
Low temperature steel pipe |
Heat treatment system of cryogenic steel tubes |
thickness/mm |
Tensile test of cryogenic steel tubes |
impulse test |
hardness |
||||
|
σb /MPa |
σs /MPa ≥ |
δ5 /% ≥ |
Φ /% ≥ |
temperature
/°C |
Akv /J ≥ |
HB≤ |
||||
|
ASME Seamless and welded nominal tubes for low temperature |
SA333Gr.1 |
≥845°C Normalizing, air cooling |
-- |
≥380 |
205 |
35 |
-- |
-45 |
18 |
-- |
|
SA333Gr.3 |
≥845°C Normalizing, air cooling |
-- |
≥450 |
240 |
30 |
-- |
-100 |
18 |
-- |
|
|
SA333Gr.6 |
≥845°C Normalizing, air cooling |
-- |
≥415 |
240 |
30 |
-- |
-45 |
18 |
-- |
|
|
SA333Gr.7 |
≥845°C Normalizing, air cooling |
-- |
≥450 |
240 |
30 |
-- |
-75 |
18 |
-- |
|
|
SA333Gr.8 |
First time : Normalizing, air cooling:quench(800°C±15°C)+temper(565~605°C) Second Time :(900°C±15°C)air cooling+(790°C±15°C)air cooling+(565~605°C)air cooling or water quenching |
-- |
≥690 |
515 |
22 |
-- |
-195 |
-- |
-- |
|
|
SA333Gr.9 |
≥845°C Normalizing, air cooling |
-- |
≥435 |
315 |
28 |
-- |
-75 |
18 |
-- |
|
|
ASME Carbon steel and alloy steel tubes, seamless and welded, for low temperature use |
SA333Gr.1 |
≥845°C Normalizing, air cooling |
-- |
380≥ |
205 |
35 |
-- |
-45 |
18 |
-- |
|
SA333Gr.3 |
≥845°C Normalizing, air cooling |
-- |
≥450 |
240 |
30 |
-- |
-100 |
18 |
-- |
|
|
SA333Gr.6 |
≥845°C Normalizing, air cooling |
-- |
≥415 |
240 |
30 |
-- |
-45 |
18 |
-- |
|
|
SA333Gr.7 |
≥845°C Normalizing, air cooling |
-- |
≥450 |
240 |
30 |
-- |
-75 |
18 |
-- |
|
|
SA333Gr.8 |
First time : Normalizing, air cooling:quench(800°C±15°C)+temper(565~605°C) Second Time :(900°C±15°C)air cooling+(790°C±15°C)air cooling+(565~605°C)air cooling or water quenching |
-- |
≥690 |
520 |
22 |
-- |
-195 |
18 |
-- |
|
|
Grade |
Minimum impact test temperature |
|
|
℉ |
℃ |
|
|
16MnDG |
-- |
-45 |
|
10MnDG |
-- |
-45 |
|
09DG |
-- |
-45 |
|
09Mn2VDG |
-- |
-70 |
|
06Ni3MoDG |
-- |
-100 |
|
A333 Grade1 |
-50 |
-45 |
|
A333 Grade3 |
-150 |
-100 |
|
A333 Grade4 |
-150 |
-100 |
|
A333 Grade6 |
-50 |
-45 |
|
A333 Grade7 |
-100 |
-75 |
|
A333 Grade8 |
-320 |
-195 |
|
A333 Grade9 |
-100 |
-75 |
|
A333 Grade10 |
-75 |
-60 |
|
A333 Grade11 |
-- |
-- |
|
standard |
mark |
· Tensile Strength (Mpa) |
yield strength(Mpa) |
Elongation (%) |
|
|
lengthways |
crosswise |
|
|
|
|
|
GB/T1898 -2003 |
16MnDG |
490-665 |
≥325 |
≥30 |
-- |
|
10MnDG |
≥400 |
≥240 |
≥35 |
-- |
|
|
09DG |
≥385 |
≥210 |
≥35 |
-- |
|
|
09Mn2VDG |
≥450 |
≥300 |
≥30 |
-- |
|
|
06Ni3MoDG |
≥455 |
≥250 |
≥30 |
-- |
|
|
ASTM A333 |
Grade1 |
≥380 |
≥205 |
≥35 |
≥25 |
|
Grade3 |
≥450 |
≥240 |
≥30 |
≥20 |
|
|
Grade4 |
≥415 |
≥240 |
≥30 |
≥16.5 |
|
|
Grade6 |
≥415 |
≥240 |
≥30 |
≥16.5 |
|
|
Grade7 |
≥450 |
≥240 |
≥30 |
≥22 |
|
|
Grade8 |
≥690 |
≥515 |
≥22 |
-- |
|
|
Grade9 |
≥435 |
≥315 |
≥28 |
-- |
|
|
Grade10 |
≥550 |
≥450 |
≥22 |
-- |
|
|
Grade11 |
≥450 |
≥240 |
≥18 |
-- |
|
Chemical component:
|
standard |
mark |
chemical component(%) |
|
|
|
|
|
|
|
|
|
|
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Mo |
V |
Al |
|
|
|
GB/T18984 -2003 |
16MnDG |
0.12-0.20 |
0.20-0.55 |
1.20-1.60 |
≤0.025 |
≤0.025 |
-- |
-- |
-- |
-- |
-- |
-- |
|
10MnDG |
≤0.13 |
0.17-0.37 |
≤1.35 |
≤0.025 |
≤0.025 |
-- |
-- |
-- |
-- |
≤0.07 |
-- |
|
|
09DG |
≤0.12 |
0.17-0.37 |
≤0.95 |
≤0.025 |
≤0.025 |
-- |
-- |
-- |
-- |
≤0.07 |
-- |
|
|
09Mn2VDG |
≤0.12 |
0.17-0.37 |
≤1.85 |
≤0.025 |
≤0.025 |
-- |
-- |
-- |
-- |
≤0.12 |
-- |
|
|
06Ni3MoDG |
≤0.08 |
0.17-0.37 |
≤0.85 |
≤0.025 |
≤0.025 |
-- |
2.5-3.7 |
-- |
0.15-0.30 |
≤0.05 |
-- |
|
|
ASTM A333 |
Grade1 |
≤0.30 |
-- |
0.40-1.06 |
≤0.025 |
≤0.025 |
-- |
-- |
-- |
-- |
-- |
-- |
|
Grade3 |
≤0.19 |
0.18-0.37 |
0.31-0.64 |
≤0.025 |
≤0.025 |
-- |
3.18-3.82 |
-- |
-- |
-- |
-- |
|
|
Grade4 |
≤0.12 |
0.18-0.37 |
0.50-1.05 |
≤0.025 |
≤0.025 |
0.44-1.01 |
0.47-0.98 |
0.40-0.75 |
-- |
-- |
0.04-0.30 |
|
|
Grade6 |
≤0.30 |
≥0.10 |
0.29-1.06 |
≤0.025 |
≤0.025 |
-- |
-- |
-- |
-- |
-- |
-- |
|
|
Grade7 |
≤0.19 |
0.13-0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
-- |
2.03-2.57 |
-- |
-- |
-- |
-- |
|
|
Grade8 |
≤0.13 |
0.13-0.32 |
≤0.90 |
≤0.025 |
≤0.025 |
-- |
8.40-9.60 |
-- |
-- |
-- |
-- |
|
|
Grade9 |
≤0.20 |
-- |
0.40-1.06 |
≤0.025 |
≤0.025 |
-- |
1.60-2.24 |
0.75-1.25 |
-- |
-- |
-- |
|
|
Grade10 |
≤0.20 |
0.10-0.35 |
1.15-1.50 |
≤0.030 |
≤0.015 |
≤0.15 |
≤0.25 |
≤0.015 |
≤0.50 |
≤0.12 |
≤0.06 |
|
|
Grade11 |
≤0.10 |
≤0.035 |
≤0.60 |
≤0.025 |
≤0.025 |
≤0.50 |
35.0-37.0 |
-- |
≤0.50 |
-- |
-- |
|
Read more : What is seamless black steel pipe?
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