| Type: | Square Steel, Flat Steel, Hexagonal Steel4 |
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| Standard: | AISI, ASTM, DIN, JIS, GB, BS |
| Composition: | Carbon Steel |
| Technique: | Hot Rolled |
| Shape: | Bar |
| Surface Treatment: | Blace/Polishing/Oiling or Galvanizing/ etc |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier 
Its properties are similar to those of No. 50 steel, but its hardenability is relatively high. After heat treatment, its strength, hardness, and elasticity are slightly higher than those of No. 50 steel. Poor weldability, with a tendency to overheat sensitivity and temper brittleness.| composition | C | Si | Mn | P | S | Cr | Ni | Cu |
| minimum value | 0.48 | 0.17 | 0.7 | - | - | - | - | - |
| Maximum value | 0.56 | 0.37 | 1 | 0.035 | 0.035 | 0.25 | 0.3 | 0.25 |
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Commodity
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Cold Drawing / Drawn Flat/ Square / Rectangular / Rectangle / Hexagonal / Special Shape Rods Bars
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Grades
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Carbon steel
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SAE 1018 , A36, SS400, S235JR, Q235, SAE 1020, S20C , 1.0402, 20GB, CK22,
SAE 1045 ,S45C, C45, CK45, EN8 ,1.1191 |
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Alloy steel
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SAE 5120 , 20Cr, Scr 420H, 20Cr4, SAE 5140 , 40Cr,SCr440, 520M40,
SAE 4130 , 30CrMo, SCM430, SCM420, SAE 4140 , 42CrMo4, EN19, SCM440, 708A42, 708M40, SAE 4340, 40CrNiMoA,871M40 , SNCM439 |
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Specification
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Round Bar
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5mm to 100mm
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Square bar
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5*5mm to 120*120mm
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Flat bar
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5*20mm to 20*100mm
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hex bar
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5mm to 120mm
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hexagonal bar
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5mm to 120mm (side to side)
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Tolerance
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Class H11
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Length
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4-12m random length or as per request fixed length
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Surface
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Bright, or dark as per required
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Packing
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Wrapped by plastic clothes and steel strips
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Delivery Condition
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BK, BKW, GBK, NBK
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Container
Size |
20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High)
40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High) |
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Application
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hardware tools, auto parts, standard parts, fasteners common shaft, machinery manufacturing, light industry, hardware, bicycles,
cars, motorcycles, textile machinery, transformers and other machinery industry. |
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Advantages
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greater size accuracy, straightness and increased tensile and yield strength as well as improved machinability
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MOQ
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1 tons
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| Theoretical weight table of square steel | |||||
| Side length (mm) | Cross sectional area (cm2) | Theoretical weight (kg/m) | Side length (mm) | Cross sectional area (cm2) | Theoretical weight (kg/m) |
| 5mm | 0.25 | 0.196 | 30mm | 9.00 | 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 | 1.00 | 0.785 | 40mm | 16.00 | 12.56 |
| 11mm | 1.21 | 0.95 | 42mm | 17.64 | 13.85 |
| 12mm | 1.44 | 1.13 | 45mm | 20.25 | 15.90 |
| 13mm | 1.69 | 1.33 | 48mm | 23.04 | 18.09 |
| 14mm | 1.96 | 1.54 | 50mm | 25.00 | 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 | 36.00 | 28.26 |
| 18mm | 3.24 | 2.54 | 63mm | 39.69 | 31.16 |
| 19mm | 3.61 | 2.82 | 65mm | 42.25 | 33.17 |
| 20mm | 4.00 | 3.14 | 70mm | 49.00 | 38.49 |
| 21mm | 4.41 | 3.46 | 75mm | 56.25 | 44.16 |
| 22mm | 4.84 | 3.80 | 80mm | 64.00 | 50.24 |
| 24mm | 5.76 | 4.52 | 85mm | 72.25 | 56.72 |
| 25mm | 6.25 | 4.91 | 90mm | 81.00 | 63.59 |
| 26mm | 6.76 | 5.30 | 95mm | 90.25 | 70.85 |
| 28mm | 7.84 | 6.15 | 100mm | 100.00 | 78.50 |
| Diameter (thickness) d mm |
tensile strength σb Mpa |
yield point σs Mpa |
Elongation or elongation after fracture δ % |
hardness HBW |
| D=25 (sample size) | Normalizing or quenching+tempering ≥645 |
Normalizing or quenching+tempering ≥390 |
Normalizing or quenching+tempering ≥13 |
Unheat treated steel ≤255 |
| Annealed steel ≤217 |
Packaging |
1. by bundles, each bundle weight under 3 tons, for small outer diameter steel bars, each bundle with 4 - 8 steel strips. 2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each bar, then make bundles |
| 20 feet container contains dimension | Length under 6000mm |
| 40 feet container contains dimension | Length under 12000mm |
| By bulk vessel | Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo |
1. Who are we?
Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.
2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;
3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.
5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese
6. How can we get your price?
A. We need the following information to quote for you:
1). Product Name
2). standard
3). Material grade (chemical composition)
4). dimension
5). amount
6). Special part drawin
Suppliers with verified business licenses
Audited Supplier 
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