| type | Chinese enterprise standard | fairly international standard | illustrate |
| Standard | Grade | Standard | Grade |
| Hot rolled low carbon steel | Q/BQB 302 | SPHC | JIS G3131 | SPHC | Suitable for the manufacture of cold-formed parts. |
| SPHD | SPHD |
| SPHE | SPHE |
| StW22 | DIN 1614 | StW22 (DD11) |
| StW23 | (EN10111) | STW23 (DD12) |
| StW24 | | StW24 (DD13) |
| general structural steel | Q/BQB 303 | SS 330 | JIS G3101 | SS 330 | It is used for general structural parts such as buildings, bridges,
ships, and vehicles. |
| SS400 | SS400 |
| SS 490 | SS 490 |
| SS 540 | SS 540 |
| St 33 | DIN 17100 | St 33 (S185) |
| St 37-2 | (EN10025) | St 37-2 (S235JR) |
| St 37-3 | | St 37-3 (S235JO) |
| St 44-2 | | St 44-2 (S275JR) |
| St 50-2 | | St 50-2 (E295) |
| St 52-3 | | St 52-3 (S355JO) |
| steel for welded structures | Q/BQB 303 | SM400A | JIS G3106 | SM400A | It is used for structural parts requiring excellent welding
performance, such as buildings, bridges, ships, vehicles, oil
tanks, and engineering machinery. |
| SM400B | SM400B |
| SM400C | SM400C |
| SM490A | SM490A |
| SM490B | SM490B |
| SM490C | SM490C |
| SM490YA | SM490YA |
| SM490YB | SM490YB |
| SM520B | SM520B |
| SM520C | SM520C |
| B520JJ | --- | --- | Concrete mixer truck cylinder with hot rolled steel plate. |
| Welten590RE | NSC | Welten590RE | Weldable high-strength steel plates are used for pressure vessels,
oil tanks, construction machinery, mining machinery, pressure water
pipes, etc. |
| B590GJA | --- | --- |
| B590GJB |
| Mechanical structural steel | Q/BQB 303 | C22 | DIN 17200 | C22 | It is used for mechanical structural parts after cutting and other
processing and heat treatment. |
| C35 | JIS G4501 | C35 |
| S20C | | S20C |
| S35C | | S35C |
| Fine Grain Structural Steel | --- | StE255 | DIN 17102 | StE255 | Fine grained structural steel suitable for welding. |
| StE355 | StE355 |
| steel strip for steel pipe | Q/BQB 303 | SPHT1 | JIS G3132 | SPHT1 | For welding steel pipes. |
| SPHT2 | SPHT2 |
| SPHT3 | SPHT3 |
| Automotive Structural Steel | Q/BQB 310 | SAPH 310 | JIS G3113 | SAPH 310 | Used for automotive structural parts such as automotive frames and
wheels that require formability. |
| BZJ 311 | SAPH 370 | SAPH 370 |
| BZJ 312 | SAPH 400 | SAPH 400 |
| BZJ 313 | SAPH 440 | SAPH 440 |
| BZJ 314 | QStE 340TM | SEW 092 | QStE 340TM (---) | Hot-rolled granular steel for cold deformation, used for structural
parts such as automobile beams that require good cold forming
performance and high or high strength requirements. |
| QStE 380TM | (EN10149-2) | QStE 380TM (---) |
| QStE 420TM | | QStE 420TM (S420MC) |
| QStE 460TM | | QStE 460TM (S460MC) |
| QStE 500TM | | QStE 500TM (S500MC) |
| B330CL | --- | --- | It has good cold forming performance, and is used for wheel mesh
and spokes of automobile rolling wheels. |
| B380CL |
| B420CL |
| B440QZr | --- | --- | It is used in the manufacture of automobile transmission shafts. |
| B480QZR |
| B320L B550L | --- | --- | Used for automobile girders and beams. |
| B510L B420L |
| B510DL |
| Boiler and pressure vessel steel | Q/BQB 320 | HII | DIN 17155 (EN10028-2) | HII (P265GH) | In addition to ensuring normal temperature performance, it also
guarantees mechanical properties at higher temperatures, and is
suitable for steam boiler equipment, pressure vessels with higher
working temperatures and similar structural parts. |
| 19Mn6 | 19Mn6 (P355GH) |
| Q/BQB 320 | SB410 | JIS G3103 | SB410 |
| Q/BQB 321 | B440HP | JIS G3116 | SG295 | Steel plates for welding gas cylinders. |
| B490HP | SG325 |
| steel for hull structure | Q/BQB 330 | A | LR,BV | A | It can be supplied according to the specifications of the
classification societies of various countries. |
| B | GL, DNV | B |
| D. | ABS | D. |
| Atmospheric corrosion resistant steel | Q/BQB 340 | WTSt37-2 | SEW087 (EN10155) | WTSt37-2 (S235J2W) | It is used to manufacture interception and fuel for structural
parts such as containers, railway vehicles, oil derricks, and
construction machinery that require atmospheric corrosion
resistance. |
| WTSt52-3 | WTSt52-3 (S355J2G1W) |
| NAW 400 | NSC | NAW 400 |
| NAW 490 | NAW 490 |
| B460NQR | --- | --- |
| B490NQR |
| Sulfuric acid corrosion resistant steel | S-ten2 | NSC | S-ten2 | Used in the manufacture of containers for hydrogen
sulfide-containing media, etc. |
| seawater corrosion resistant steel | Mariloy G41A | Mariloy G41A | Used for structural components such as oil production platforms,
ships, and harbor buildings. |
| Mariloy S50A | Mariloy S50A |
| high weather resistance | BZJ342 | B480GNQR | --- | --- | Used in the manufacture of vehicles, containers, construction and |
| structural steel | other structural parts. |
| Through-thickness properties of hot rolled steel sheets | Q/BQB 350 | Z15 | --- | --- | The thickness direction performance of the steel plate has good
lamellar tear resistance performance, and is used for offshore oil
production platforms and other structural parts that require
thickness performance. |
| Z25 |
| Z35 |
| case hardened steel | Q/BQB 360 | C10 | DIN 17210 | C10 | High-purity low-carbon steel is used for surface carburizing or
nitriding followed by quench hardening to manufacture structural
parts with high hardness and wear resistance on the surface and
high toughness on the core. |
| C15 | C15 |
| S09CK | JIS G4051 | S09CK |
| S15CK | S15CK |
| High toughness pipeline steel | BZJ 371 | X60RL | API 5L | X60 | High-toughness pipeline steel hot-rolled wide-band steel for spiral
welding production of oil pipelines |
| X70RL | X70 |
| straight seam welding | BZJ 372 | J55 | API 5CT | J55 | For the manufacture of straight seam welded oil casing |
| Steel for casing |
| Tread plate | BZJ 390 | BCP 270 | --- | --- | Lentil shaped checkered steel plate |
| BCP 340 |
| BCP 400 |
| Hot continuous rolled wide steel for bicycles | BZJ 304 | SPHT1Z,SPHT2Z | --- | --- | Used in the manufacture of bicycle upper, lower, rear joints, front
wishbones, front faceplates, chain rolling handlebar cross tubes,
center shafts and other parts |
| SPHT3Z, SPHDZ |
| SM50BZ,SM53BZ |
| For pipeline | GB14164 | S205,S240 | API 5L | Grade A,B | Oil and natural gas pipeline |
| hot rolled coil | S315 | X42,X46,X52 |
| S290,S360,S385 | X56,X60,X65 |
| S415,S450,S480 | X70 |
