| Type: | Square Steel, Flat Steel, Hexagonal Steel4 |
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| Standard: | AISI, ASTM, DIN, JIS, GB, BS |
| Composition: | Alloy Steel |
| Technique: | Hot Rolled |
| Shape: | Bar |
| Surface Treatment: | Blace/Polishing/Galvanizing/ etc |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier 
The grades 08, 10, 15, 20 and 25 of high-quality carbon structural steel belong to low carbon steel, which has good plasticity and is easy to draw, press, extrude, forge and weld. Among them, 20 steel is the most widely used, which is often used to manufacture screws, nuts, washers, small shafts, stamping parts, weldments, and sometimes carburized parts. 30, 35, 40, 45, 50, 55 and other grades belong to medium carbon steel. Due to the increase of pearlite content in the steel, its strength and hardness are higher than before, and the hardness after quenching can be significantly increased. Among them, 45 steel is the most typical. It has not only high strength and hardness, but also good plasticity and toughness, that is, excellent comprehensive properties. 45 steel is the most widely used in mechanical structures. It is often used to manufacture shafts, lead screws, gears, connecting rods, sleeves, keys, important screws and nuts, etc. The grades of 60, 65, 70 and 75 belong to high carbon steel. After quenching and tempering, they not only improve their strength and hardness, but also have excellent elasticity. They are often used to make small springs, springs, wire ropes, rolls, etc.
| C | Si | Mn | P | S | Cu | P | S | Cu | |
| 08F 1008 1010 SPHE SPHD | ≤0.1 | according to requirements | 0.3-0.6 | ≤0.03 | ≤0.05 | ≥0.2 | ≤ | ||
| 10# 1010 CK10 S10C S12C | 0.08-0.13 | 0.3-0.6 | ≤0.04 | ≤0.05 | ≥0.2 | 0.030 | 0.030 | 0.30 | |
| 15# 1015 S15C S17C CK15 | 0.13-0.18 | 0.3-0.6 | ≤0.04 | ≤0.05 | ≥0.2 | 0.030 | 0.030 | 0.30 | |
| 1020/20#/CK22/C22E/S20C/1.1151/1.0144/ | 0.18-0.23 | 0.3-0.6 | ≤0.03 | ≤0.05 | ≤0.2 | 0.040 | 0.050 | 0.20 | |
| 1025 25# 1.1158 S28C C25 | 0.22-0.28 | 0.3-0.6 | ≤0.04 | ≤0.05 | ≥0.2 | 0.025 | 0.035 | 0.30 | |
| 1030 30# C30 CK30 S30C | 0.28-0.34 | 0.6-0.9 | ≤0.04 | ≤0.05 | ≥0.2 | 0.030 | 0.030 | 0.30 | |
| 1035 35# C35 CK35 S35C | 0.32-0.38 | 0.6-0.9 | ≤0.04 | ≤0.05 | ≥0.2 | 0.030 | 0.030 | 0.30 | |
| 1040/S40C/1.1186/C40E/SK40/1.1189/1.1186 | 0.37-0.44 | 0.6-0.9 | ≤0.04 | ≤0.05 | ≥0.2 | 0.035 | 0.035 | 0.30 | |
| 1045 45# S45C S48C C45 | 0.43-0.5 | 0.6-0.9 | ≤0.04 | ≤0.05 | ≥0.2 | 0.030 | 0.030 | 0.30 | |
| 1050 50# S50C S53C C50 | 0.48-0.55 | - | 0.6-0.9 | ≤0.04 | ≤0.05 | ≤0.2 | 0.040 | 0.040 | - |
| 1055 55# C55 CK55 S55C | 0.5-0.6 | according to requirements | 0.6-0.9 | ≤0.04 | ≤0.05 | ≥0.2 | 0.025 | 0.035 | 0.40 |
| 1060/60#/1.1221/1.0601/C60E/CK60/S58C | 0.55-0.65 | according to requirements | 0.6-0.9 | ≤0.04 | ≤0.05 | ≥0.2 | 0.025 | 0.025 | 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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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 |
| condition | Heat treatment or condition | tensile strength σb Mpa |
Reduction of area ψ % |
| Hot rolled bar and wire | Spheroidizing annealing (GKZ) or spheroidizing annealing (GKZ)+peeling (SH) | ≤460 | ≥65 |
| Pulling products | Cold drawing (K)+spheroidizing annealing (GKZ) | ≤460 | ≥65 |
| Pulling products | Cold drawing (K)+spheroidizing annealing (GKZ)+finishing (K) | ≤490 | ≥65 |
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.
Suppliers with verified business licenses
Audited Supplier 
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