carbon small diameter precision seamless steel tube
Product name | Material | Standard | Size(mm) | Application |
Low temperature tube | 16MnDG 10MnDG 09DG 09Mn2VDG 06Ni3MoDG ASTM A333 | GB/T18984- 2003 ASTM A333 | OD:8-1240* WT:1-200 | Apply to - 45 ℃ ~ 195 ℃ low temperature pressure vessel and low temperature heat exchanger pipe |
High-pressure boiler tube | 20G ASTMA106B ASTMA210A ST45.8-III | GB5310-1995 ASTM SA106 ASTM SA210 DIN17175-79 | OD:8-1240* WT:1-200 | Suitable for manufacturing high pressure boiler tube, header, steam pipe, etc |
Petroleum cracking tube | 10 20 | GB9948-2006 | OD: 8-630* WT:1-60 | Used in oil refinery furnace tube, heat exchanger tube |
Low medium pressure boiler tube | 10# 20# 16Mn,Q345 | GB3087-2008 | OD:8-1240* WT:1-200 | Suitable for manufacturing various structure of low and medium pressure boiler and locomotive boiler |
General structure of the tube | 10#,20#,45#,27SiMn ASTM A53A,B 16Mn,Q345 | GB/T8162- 2008 GB/T17396- 1998 ASTM A53 | OD:8-1240* WT:1-200 | Apply to the general structure, engineering support, mechanical processing, etc |
Oil casing | J55,K55,N80,L80 C90,C95,P110 | API SPEC 5CT ISO11960 | OD:60-508* WT:4.24-16.13 | Used for extraction of oil or gas in oil Wells casing, used in oil and gas well sidewall |
Chemical Composition(%): |
Standard | Steel Grade | C | Si | Mn | P | S |
BS6323-4 | CFS3 | ≤0.20 | ≤0.35 | ≤0.9 | ≤0.050 | ≤0.050 |
CFS4 | ≤0.25 | ≤0.35 | ≤1.20 | ≤0.050 | ≤0.050 |
CFS5 | ≤0.23 | ≤0.50 | ≤1.50 | ≤0.050 | ≤0.050 |
CFS8 | 0.40-0.55 | ≤0.35 | 0.50-0.90 | ≤0.050 | ≤0.050 |
ASTM A519 | SAE 1010 | 0.08-0.13 | / | 0.30-0.60 | ≤0.04 | ≤0.05 |
SAE 1020 | 0.18-0.23 | / | 0.30-0.60 | ≤0.04 | ≤0.05 |
SAE1045 | 0.43-0.50 | / | 0.60-0.90 | ≤0.04 | ≤0.05 |
JIS G3445 | STKM11A | ≤0.12 | ≤0.35 | ≤0.60 | ≤0.040 | ≤0.040 |
STKM13A | ≤0.25 | ≤0.35 | 0.30-0.90 | ≤0.040 | ≤0.040 |
DIN2391 standard steel and heat treatment process delivery conditions: |
Delivery Condition | Heat Treatment Process |
+C | Cold drawn / hard. After the final cold forming no heat treatment. |
+LC | Cold drawn / soft. After the final heat treatment limiting deformation cold drawn, allowing a degree of cold deformation |
+SR | Steel heat treatment is applied after the last cold deformation process, the result of state steel after due process, the residual stress deformation and machining makes a certain degree of difficulty increases. |
+A | In the final step of the steel pipe after cold deformation, placed in a controlled atmosphere furnace for annealing. |
+N | In the final step of the steel pipe after cold deformation, placed in a controlled atmosphere furnace at a temperature above the phase transition point to continue annealing. |

