Product Description
Carbon/alloy square steel bar is ideal for many industrial products and applications where strength and durability are required. Characteristics of carbon steel bars are based on the carbon content. Increased carbon content will raise carbon steel's hardness and strength. Inversely, lower carbon content results in a softer (mild) carbon steel that is easier to machine and weld.The type of carbon steel needed is generally based on the application requirements. If you need assistance in determining the right carbon steel bar for your job our sales team is happy to help. Contact us on how we can help you with your next project.
| product name | square bar/billet | |
| Width(mm) | 5mm*5mm-500*500mm | |
| Length(mm) | 600-12000mm | |
| Technology | hot rolled/cold rolled/cold drawn | |
| Material | ASTM | A36, Grade 36, Grade 40 Grade 50, Grade 60, Grade 80,etc |
| DIN | Ck10,Ck15,Ck22,Ck25,Ck30,Ck35,Ck40,Ck45,Ck50, 30Mn4,40Mn4,etc | |
| BS | 040A04,095M15,045M10,080A40,045M10,080M50,etc | |
| GB | Q195, Q215, Q235, Q255, Q275, Q295, Q345, Q390, Q420, Q500, etc | |
| Standard | GB/T799,ASTM A29,A108,A321,A575,BS970,DIN1652,JIS G4051 | |
| Surface | Black painting, varnish paint, anti rust oil, hot galvanized, cold galvanized, 3PE | |
| Certificates | API5L ISO 9001:2008 TUV SGS CE BV etc | |
| Packaging | Loose package, Packaged in bundles(3Ton Max) , bundled pipes with two slings at the both end for easy loading and discharging, End with Plastic caps or as per requirement | |
| Application | 1. Fluid pipe 2. Power Plant 3. Structure pipe 4. High and low pressure Boiler tube 5. Seamless pipe /tube for petroleum cracking 6. Conduit pipe 7. Scaffolding pipe pharmaceutical andship,building etc. | |
| Tolerance | ±1% | |
| MOQ | 1 ton | |
| Supply Ability | 5000 tons / month | |
| Lead Time | 7-15 working days after the receipt of 30% deposit | |
| Payment Terms | 30%T/T Advance + 70% Balance | |
| Price Terms | FOB, CFR, CIF, EXW | |
| Packing | Standard sea-worthy package or as required | |
| Grade | Dia(mm) | Chemical Composition (%) | |||||||||
| C | Si | Mn | P | S | Ni | Cr | Cu | Ti | Mo | ||
| 45 | 18-60 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.25 | ≤0.25 | ||
| 55 | 0.52-0.60 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | ≤0.30 | ≤0.25 | ≤0.25 | |||
| 40Mn2 | 0.37-0.44 | 0.17-0.37 | 1.40-1.80 | ≤0.035 | ≤0.035 | ≤0.30 | |||||
| 20CrMnTi | 0.17-0.23 | 0.17-0.37 | 0.80-1.10 | ≤0.035 | ≤0.035 | 1.00-1.30 | 0.04-0.10 | ||||
| 20CrMo | 0.17-0.24 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.80-1.10 | 0.15-0.25 | ||||
| 30CrMo | 0.26-0.34 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.80-1.10 | 0.15-0.25 | ||||
| 35CrMo | 0.32-0.40 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.035 | 0.80-1.10 | 0.15-0.25 | ||||
| 42CrMo | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | 0.90-1.20 | 0.15-0.25 | ||||
| 60Si2MnA | 0.38-0.45 | 0.17-0.37 | 0.50-0.80 | ≤0.035 | ≤0.035 | 0.90-1.20 | |||||
| Grade | Mechanical property | |||||
| (Quenching, tempering, longitudinal) | ||||||
| Tensile strength | Yield strength | Elongation | Elongation | Percentage reduction of area | Impact absorbing energy | |
| (σb/MPa) | (σs/MPa) | (δ5/%) | (δ10/%) | (ψ/%) | (AkU2/J) | |
| 45 | ≥600 | ≥335 | ≥16 | ≥40 | 39 | |
| 55 | ≥645 | ≥380 | ≥13 | ≥35 | - | |
| 40Mn2 | ≥885 | ≥735 | ≥12 | ≥45 | 55 | |
| 20CrMnTi | ≥1080 | ≥850 | ≥10 | ≥45 | 55 | |
| 20CrMo | ≥885 | ≥685 | ≥12 | ≥50 | 78 | |
| 30CrMo | ≥930 | ≥785 | ≥12 | ≥50 | 63 | |
| 35CrMo | ≥980 | ≥835 | ≥12 | ≥45 | 63 | |
| 42CrMo | ≥1080 | ≥930 | ≥12 | ≥45 | 63 | |
| 60Si2MnA | ≥1274 | ≥1176 | ≥5 | ≥25 | - | |
| Theoretical weight table of square steel bar | |||||
| Side length(mm) | Sectional area(cm2) | Theoretical weight (kg/m) | Side length | Sectional area(cm2) | Theoretical weight (kg/m) |
| 5mm | 0.25 | 0.196 | 30mm | 9 | 7.06 |
| 6mm | 0.36 | 0.283 | 32mm | 10.24 | 8.04 |
| 7mm | 0.49 | 0.385 | 34mm | 11.56 | 9.07 |
| 8mm | 0.64 | 0.502 | 36mm | 12.96 | 10.17 |
| 9mm | 0.81 | 0.636 | 38mm | 14.44 | 11.24 |
| 10mm | 1 | 0.785 | 40mm | 16 | 12.56 |
| 11mm | 1.21 | 0.95 | 42mm | 17.64 | 13.85 |
| 12mm | 1.44 | 1.13 | 45mm | 20.25 | 15.9 |
| 13mm | 1.69 | 1.33 | 48mm | 23.04 | 18.09 |
| 14mm | 1.96 | 1.54 | 50mm | 25 | 19.63 |
| 15mm | 2.25 | 1.77 | 53mm | 28.09 | 22.05 |
| 16mm | 2.56 | 2.01 | 56mm | 31.36 | 24.61 |
| 17mm | 2.89 | 2.27 | 60mm | 36 | 28.26 |
| 18mm | 3.24 | 2.54 | 63mm | 39.69 | 31.16 |
| 19mm | 3.61 | 2.82 | 65mm | 42.25 | 33.17 |
| 20mm | 4 | 3.14 | 70mm | 49 | 38.49 |
| 21mm | 4.41 | 3.46 | 75mm | 56.25 | 44.16 |
| 22mm | 4.84 | 3.8 | 80mm | 64 | 50.24 |
| 24mm | 5.76 | 4.52 | 85mm | 72.25 | 56.72 |
| 25mm | 6.25 | 4.91 | 90mm | 81 | 63.59 |
| 26mm | 6.76 | 5.3 | 95mm | 90.25 | 70.85 |
| 28mm | 7.84 | 6.15 | 100mm | 100 | 78.5 |
