20 G is one kind of high quality structural steel.20 G steel pipe is widely used in HP boiler pipe industry.As a professional high pressure boiler tube supplier and manufacturer,IMRI supplies boiler tubes of all sizes.Just tell us the diameter,thickness and length of the pipes you need,you will soon get our QTN.
Specifications
| Standard | GB/T5310 |
| Steel Grade/Material | 20G, 20MnG, 25MnG, 15MoG, 20MoG,12CrMoG,15CrMoG,12Cr2MoG,12Cr1MoVG |
| Outer Diameter(OD) | 1.5”-28”(38mm-720mm) |
| Wall Thickness(WT) | 2.6mm-60mm |
| Length | 5.8-16m or OEM |
| Packing | Plastic cap or bundling |
| Surface Treatmengt | Black paint,3LPE,3LPP,FBE or OEM |
| Section Shape | Round |
| Technique | Seamless hot rolled |
| Application | High pressure boiler tube |
| Place of Origin | China |
| MOQ | 25 ton |
| Transportation | 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port →America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea, Australia…(shipping) 2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”) |
| Steel types | Grade | Chemical Composition in % by mass | |||||||||||||||
| C | Si | Mn | Cr | Mo | V | Ti | B | Ni | AI | Cu | Nb | N | W | P | S | ||
| No more than | |||||||||||||||||
| Carbon steel | 20G | 0.17〜0.23 | 0.17 〜0.37 | 0.35〜0.65 | — | — | — | — | — | — | — | — | — | — | — | 0.025 | 0.015 |
| 20MnG | 0.17 〜0.23 | 0.17 〜0.37 | 0.70〜1.0 | — | — | — | — | — | — | — | — | — | — | — | 0.025 | 0.015 | |
| 25MnG | 0.22 〜0.27 | 0.17-0.37 | 0.70〜1.0 | — | — | — | — | — | — | — | — | — | — | — | 0.025 | 0.015 | |
| Alloy steel | 15MoG | 0.12 〜0.20 | 0.17 〜0.37 | 0.40 〜0.8 | — | 0.25 〜0.35 | — | — | — | — | — | — | — | — | — | 0.025 | 0.015 |
| 20MoG | 0.15 〜0.25 | 0.17 〜0.37 | 0.40 〜0.8 | — | 0.44 〜0.65 | — | — | — | — | — | — | — | — | 0.025 | 0.015 | ||
| 12CrMoG | 0.08 〜0.15 | 0.17 〜0.37 | 0.40 〜0.7 | 0.40 〜0.7 | 0.40 〜0.55 | — | — | — | — | — | — | — | — | — | 0.025 | 0.015 | |
| 15CrMoG | 0.12〜0.18 | 0.17 〜0.37 | 0.40 〜0.7 | 0.80〜1.1 | 0.40〜0.55 | — | — | — | — | — | — | — | — | — | 0.025 | 0.015 | |
| 12Cr2MoG | 0.08 〜0.15 | <0.50 | 0.40 〜0.6 | 2.00 〜2.5 | 0.90〜1.13 | — | — | — | — | — | — | — | — | — | 0.025 | 0.015 | |
| 12Cr1MoVG | 0.08 〜0.15 | 0.17 〜0.37 | 0.40〜0.7 | 0.90 〜1.2 | 0.25〜0.35 | 0.15〜0.3 | — | — | — | — | — | — | — | — | 0.025 | 0.01 | |
| Mechanical properties | |||||||||
| Grade | Tensile properties | Shock absorption energy (KV2/J) |
Hardness | ||||||
| Tensile strength Rm Mpa |
Lower yield strength or specified plastic elongation strength ReH or Rp0.2 |
Elogation at break A % |
Longitudinal | Transverse | HBW | HV | HRC or HRB | ||
| Longitudinal | Transverse | ||||||||
| No less than | |||||||||
| 20G | 410~550 | 245 | 24 | 22 | 40 | 27 | 120~160 | 120~160 | — |
| 20MnG | 415~560 | 240 | 22 | 20 | 40 | 27 | 125~170 | 125~170 | — |
| 25MnG | 485~640 | 275 | 20 | 18 | 40 | 27 | 130~180 | 130~180 | — |
| 15MoG | 450~600 | 270 | 22 | 20 | 40 | 27 | 125~180 | 125~180 | — |
| 20MoG | 415~665 | 220 | 22 | 20 | 40 | 27 | 125~180 | 125~180 | — |
| 12CrMoG | 410~560 | 205 | 21 | 19 | 40 | 27 | 125~170 | 125~170 | — |
| 15CrMoG | 440~640 | 295 | 21 | 19 | 40 | 27 | 125~170 | 125~170 | — |
| 12Cr2MoG | 450~600 | 280 | 22 | 20 | 40 | 27 | 125~180 | 125~180 | — |
| 12Cr1MoVG | 470~640 | 255 | 21 | 19 | 40 | 27 | 135~195 | 135~195 | — |
