High Quailty 20Mn2 40Mn2 50Mn2 Hot Rolled Black Low Carbon Steel Plate
| Item | Specification |
| Product Name | Hot-rolled steel sheet (Best-selling, high quality) |
| Material Grades | 10#, 20#, 45#, 16Mn, A53 (A/B), Q195, Q215, Q235, Q345, St37, St42, St37-2, St52, 20Mn2, 40Mn2, 50Mn2, 20Cr, 40Cr, 42CrMo, 35CrMo, 20CrMo, 12CrMo, 15CrMo, 12Cr1MoV, 25Cr2Mo1VA, 40CrNiMoA, etc. |
| Thickness | 1.5 mm – 24 mm |
| Standard Sizes | 3 × 1219 mm / 3.5 × 1500 mm / 4 × 1600 mm / 4.5 × 2438 mm (custom sizes available) |
| Standards | ASTM A53, ASTM A106, ASTM A252, ASTM A450, ASME B36.10M, BS 1387, BS EN 10219, BS EN 10296, GB/T 3091, GB/T 13793, GB/T 9711, etc. |
| Steel Grades Equivalent | A53–A369, Q195–Q345, ST35–ST52, Grade A / B / C |
| Production Process | Hot rolled |
| Surface Treatment | Mill finish, oiled, black painted, galvanized, anti-rust oil, PVC coating (customized available) |
| End Type (if applicable) | Plain end, beveled end, threaded, grooved, plastic cap protection |
| Packaging | Bundled packing with steel strips, waterproof wrapping, or customized export packing |
| Applications | Building structures, machinery manufacturing, lifting equipment, agricultural machinery, construction engineering, general fabrication |
| Origin | Tianjin, China |
| Certificates | ISO 9001, SGS, BV, TUV |
| Delivery Time | 7–10 days after receiving advance payment (depending on order quantity) |
20Mn2, 40Mn2, and 50Mn2 are all low alloy steels with varying compositions and properties. Here are the details for each of these steel grades:
20Mn2 Steel:
Carbon Content: 0.17-0.24%
Manganese Content: 1.40-1.80%
Typical Uses: Structural parts, gears, shafts, heavy-duty machinery
Mechanical Properties: Tensile strength of 800-1000 MPa, yield strength of 650-800 MPa
40Mn2 Steel:
Carbon Content: 0.37-0.44%
Manganese Content: 1.40-1.80%
Typical Uses: Gears, crankshafts, connecting rods
Mechanical Properties: Tensile strength of 740-980 MPa, yield strength of 540-685 MPa
50Mn2 Steel:
Carbon Content: 0.47-0.55%
Manganese Content: 1.40-1.80%
Typical Uses: Heavy-duty gears, shafts, crankshafts
Mechanical Properties: Tensile strength of 785-980 MPa, yield strength of 590-735 MPa
| Gauge Thickness Comparison Table | ||||
| Gauge | Mild | Aluminum | Galvanized | Stainless |
| Gauge 3 | 6.08mm | 5.83mm | 6.35mm | |
| Gauge 4 | 5.7mm | 5.19mm | 5.95mm | |
| Gauge 5 | 5.32mm | 4.62mm | 5.55mm | |
| Gauge 6 | 4.94mm | 4.11mm | 5.16mm | |
| Gauge 7 | 4.56mm | 3.67mm | 4.76mm | |
| Gauge 8 | 4.18mm | 3.26mm | 4.27mm | 4.19mm |
| Gauge 9 | 3.8mm | 2.91mm | 3.89mm | 3.97mm |
| Gauge 10 | 3.42mm | 2.59mm | 3.51mm | 3.57mm |
| Gauge 11 | 3.04mm | 2.3mm | 3.13mm | 3.18mm |
| Gauge 12 | 2.66mm | 2.05mm | 2.75mm | 2.78mm |
| Gauge 13 | 2.28mm | 1.83mm | 2.37mm | 2.38mm |
| Gauge 14 | 1.9mm | 1.63mm | 1.99mm | 1.98mm |
| Gauge 15 | 1.71mm | 1.45mm | 1.8mm | 1.78mm |
| Gauge 16 | 1.52mm | 1.29mm | 1.61mm | 1.59mm |
| Gauge 17 | 1.36mm | 1.15mm | 1.46mm | 1.43mm |
| Gauge 18 | 1.21mm | 1.02mm | 1.31mm | 1.27mm |
| Gauge 19 | 1.06mm | 0.91mm | 1.16mm | 1.11mm |
| Gauge 20 | 0.91mm | 0.81mm | 1.00mm | 0.95mm |
| Gauge 21 | 0.83mm | 0.72mm | 0.93mm | 0.87mm |
| Gauge 22 | 0.76mm | 0.64mm | 085mm | 0.79mm |
| Gauge 23 | 0.68mm | 0.57mm | 0.78mm | 1.48mm |
| Gauge 24 | 0.6mm | 0.51mm | 0.70mm | 0.64mm |
| Gauge 25 | 0.53mm | 0.45mm | 0.63mm | 0.56mm |
| Gauge 26 | 0.46mm | 0.4mm | 0.69mm | 0.47mm |
| Gauge 27 | 0.41mm | 0.36mm | 0.51mm | 0.44mm |
| Gauge 28 | 0.38mm | 0.32mm | 0.47mm | 0.40mm |
| Gauge 29 | 0.34mm | 0.29mm | 0.44mm | 0.36mm |
| Gauge 30 | 0.30mm | 0.25mm | 0.40mm | 0.32mm |
| Gauge 31 | 0.26mm | 0.23mm | 0.36mm | 0.28mm |
| Gauge 32 | 0.24mm | 0.20mm | 0.34mm | 0.26mm |
| Gauge 33 | 0.22mm | 0.18mm | 0.24mm | |
| Gauge 34 | 0.20mm | 0.16mm | 0.22mm | |
Application of Hot Rolled Steel Plate
1. Construction Industry
Hot-rolled steel plates are standardized products used in building structures such as beams, supports, floor slabs, walls, and roofs. Due to their high strength and reliability, they are also commonly used in the construction of large infrastructure projects such as bridges and skyscrapers.
2. Automotive Industry
Hot-rolled steel sheets play a vital role in the automotive industry, used to manufacture various body structural components, including frames, doors, and hoods.
3. Energy Industry
Steel plates are also used in energy infrastructure, such as power plants, transmission towers, and oil and gas pipelines. These applications place high demands on the service life and load-bearing capacity of the steel sheets.
4. Machinery Manufacturing
Hot-rolled steel sheets are suitable for various industrial applications, such as machine tools, heavy machinery parts, and robots.
Note:
1.Free sampling, 100% after-sales quality assurance, Support any payment method;
2.All other specifications of round carbon steel pipes are available according to your requirement (OEM&ODM)! Factory price you will get from ROYAL GROUP.
Hot rolling is a mill process which involves rolling the steel at a high temperature
which is above the steel’s recrystallization temperature.
Packaging
Hot rolled steel plates are usually packed in strong bundles with export standard to keep the steel plates in good condition during shipping. Each bundle is tied firmly by several steel straps and wrapped in waterproof materials to avoid getting wet and rust in stored and shipped. Other protections can be used according to buyer's requests like plastic film, PVC film or rust preventive oil film. The Lot number, heat number and the product specifications etc are printed on the labels for easy recognition.
Delivery
Flexible delivery solutions available upon order quantity and destination. Regular production and delivery time is in 7–10 days for the goods with receiving your prepayment. Please note that delivery time may be flexible for large quantity or customized order. The products can be sent by sea, land or air by combination as per global project requisites, to make sure they arrive precisely at destination port or site safely and on time.
Transportation: Express (Sample Delivery), Air, Rail, Land, Sea shipping (FCL or LCL or Bulk)
Q: Are u a manufacturer?
A: Yes, we are a manufacturer. We have our own factory located in Daqiuzhuang Village, Tianjin City, China. Besides, we cooperate with many state-owned enterprises, such as BAOSTEEL, SHOUGANG GROUP, SHAGANG GROUP,etc.
Q: Can I have a trial order only several tons?
A: Of course. We can ship the cargo for u with LCL serivece.(Less container load)
Q: Do u have payment superiority?
A: 30% deposit by T/T, the balance against copy of B/L by T/T.
Q: If sample free?
A: Sample free, but the buyer pays for the freight.
Q: Are you gold supplier and do trade assurance?
A: We 13 years gold supplier and accept trade assurance.











