Construction Machinery Steel
Construction machinery steel is one of the categories in the medium and heavy plate product line with the highest technical content and the greatest added value. Unlike ordinary structural steel, construction machinery steel must achieve a precise balance between high strength, high wear resistance, high toughness, and excellent weldability to ensure long-term reliable operation of equipment under extreme working conditions such as impact, abrasion, and alternating loads.
Product Advantages
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Lightweight
Carry greater loads with less material
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High Reliability
Construction machinery equipment features complex structures with numerous welded joints, where weldability directly determines structural safety.
Low crack susceptibility steels (e.g., yield strength 460–960MPa grades) offer excellent weldability with preheating omitted and no post-weld heat treatment required, suitable for various coal mining machinery, construction machinery, port machinery, and structural components requiring good weldability.
Market Applications
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Construction machinery medium and heavy plates are widely used in structural and wear-resistant components across the full range of heavy-duty equipment.
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High-strength structural steel is primarily used in load-bearing structural components such as booms, lifting arms, arm frames, and hydraulic supports of excavators, wheel loaders, bulldozers, cranes, concrete pump trucks, and mining trucks.
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The market is characterized by "steady overall growth, accelerated structural upgrading toward high-end products, and continuously increasing concentration," with supply gaps remaining in high-end grades and broad headroom for domestic substitution.
Specifications
| Execution Standard | Grade | Guaranteed Properties (mm) | Guaranteed Ultrasonic Testing (mm) | Delivery Condition |
| GB/T1591 | Q355B/C/D、Q390A/B/C/D/E、Q420A/B/C/D/E、Q460C/D/E、Q355NB/NC/ND/NE/NF、Q390NB/NC/ND/NE、Q420NB/NC/ND/NE、Q460NC/ND/NE、Q355MB/MC/MD/ME/MF、Q390MB/MC/MD/ME、Q420MB/MC/MD/ME、Q460MC/MD/ME | 6～120 | 6～100 | AR、NR、TM、N |
| GB/T1591 GB/T16270 | Q500MC/MD/ME、Q550MC/MD/ME、Q620MC/MD/ME、Q690MC/MD/ME、Q500C/D/E、Q550C/D/E、Q620C/D/E、Q690C/D/E、Q800C/D/E、Q890C/D/E、Q960C/D/E | 6～100 | 6～100 | TM、TM+T、QT |
| EN10025 | S235JR、S235J0、S235J2、S275JR、S275J0、S275J2、S275M、S275ML、S275N、S275NL、S355JR、S355J0、S355J2、S355K2、S355N、S355NL、S420N、S420NL、S460N、S460NL、S355M、S355ML、S420M、S420ML、S460M、S460ML、S500M、S500ML、S355JOWP/J2WP、S355JOW/J2W/K2W/J4W/J5W、S420JOW/J2W/K2W/J4W/J5W、S460JOW/J2W/K2W/J4W/J5W | 6～120 | 6～100 | AR、NR、TM、N |
| S460Q、S460QL、S460QL1、S500Q、S500QL、S500QL1、S550Q、S550QL、S550QL1、S620Q、S620QL、S620QL1、S690Q、S690QL、S690QL1 | 6～100 | 6～100 | QT | |
| ASTM A36 | A36 | 6～150 | 6～100 | AR、N |
| ASTM A242 | A242 | 6～100 | 6～100 | AR、N、TM |
| ASTM A283 | GrC、GrD | 6～150 | 6～100 | AR、N |
| ASTM A529 | Gr50、Gr55 | 6～25 | 6～25 | AR、N |
| ASTM A572 | Gr42、Gr50、Gr55、Gr60、Gr65 | 6～150 | 6～100 | AR、N |
| ASTM A573 | Gr58、Gr65、Gr70 | 6～40 | 6～40 | AR、N |
| ASTM A588 | GrA、GrB、GrK | 6～100 | 6～100 | AR、N、TM |
| ASTM A633 | GrA、GrC、GrD、GrE | 6～100 | 6～100 | N |
| ASTM A656 | Gr50、Gr60、Gr70、Gr80 | 6～50 | 6～50 | AR |
| ASTM A808 | A808 | 6～65 | 6～65 | AR、TM |
| ASTM A871 | Gr60、Gr65 | 6～90 | 6～90 | AR、N、QT |
| ASTM A945 | Gr50、Gr65 | 6～65 | 6～65 | AR、TM、N、T、QT |
| ASTM A1066 | Gr50、Gr60、Gr65 | 6～100 | 6～100 | TM |
| ASTM A514 | GrB、GrE、GrF、GrH、GrS | 6～100 | 6～100 | QT |
| ASTM A678 | GrA、GrB、GrC、GrD | 6～75 | 6～75 | QT |
| ASTM A852 | A852 | 6～100 | 6～100 | QT |
| ASTM A1066 | Gr70、Gr80 | 6～50 | 6～50 | TM |
| JIS G 3106 | SM400A/B/C、SM490A/B/C、SM490YA/YB、SM520B/C、SM570 | 6～120 | 6～100 | AR、N、TM、T、QT |
| JIS G 3101 | SS330、SS400、SS490、SS540 | 6～120 | 6～100 | AR、N |
| GB/T700 | Q195、Q215A/B、Q235A/B/C/D、Q275A/B/C/D | 6～150 | 6～100 | AR、N |
| GB/T24186 | NM300、NM360、NM400、NM450、NM500、AR400F | 6～80 | 6～80 | Q、QT |
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