| 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/Oiling or Galvanizing/ etc |
| Samples: |
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| Customization: |
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Audited Supplier 
35Cr, alloy structural steel, and 30Cr steel belong to medium carbon alloy quenched and tempered steel with high strength and toughness. The strength limit is 20% higher than the corresponding grade of 35 steel, and the hardenability is slightly higher than 30Cr. Other process properties are similar to those of 30Cr.
| component | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| minimum value | 0.32 | 0.17 | 0.5 | - | - | 0.8 | - | - | - |
| Maximum value | 0.39 | 0.37 | 0.8 | 0.035 | 0.035 | 1.1 | 0.3 | 0.3 | 0.15 |
| GB | ISC | CNS | JIS | KS | ASTM/AISI | UNS | ISO | DIN EN/DIN | W-Nr. |
| 35Cr | A20352 | SCr435 | SCr435 SCr435H |
SCr435 | 5135 | G51350 | 34Cr4 | 34Cr4 | 1.7033 |
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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 |
| Sample diameter d mm |
Heat treatment or condition | tensile strength σb Mpa |
Yield point σs Mpa |
Elongation δ % |
Reduction of area ψ % |
hardnessHBW | Impact absorbed energy KV2 J |
| d=25 | Quenching+tempering | ≥930 | ≥735 | ≥11 | ≥45 | ≤207 | ≥47 |
| 1.Allowable adjustment range of heat treatment temperature: quenching ± 15 ° C, low temperature tempering ± 20 ° C, high temperature tempering ± 50 ° C 2. The mechanical properties listed in the table are applicable to the steel with the section size not greater than 80mm. For steels larger than 80 to 100mm, the elongation after fracture, reduction of area and impact absorption energy are allowed to decrease by 1% (absolute value), 5% (absolute value) and 5% respectively compared with those specified in the table; For steel with a size greater than 100 to 150 mm, the elongation after fracture, reduction of area and impact absorption energy are allowed to decrease by 2% (absolute value), 10% (absolute value) and 10% respectively compared with those specified in the table; For steel with a size greater than 150 to 250mm, the elongation after fracture, reduction of area and impact absorption energy are allowed to be reduced by 3% (absolute value), 15% (absolute value) and 15% respectively compared with those specified in the table; 3.Boron steel can be normalized before quenching, and the normalizing temperature shall not be higher than its quenching temperature. The first quenching of chrome manganese titanium steel can be replaced by normalizing 4.No yield can be found on the sample steel during tensile test, and no yield point can be measured σ Under the condition of s, the specified residual elongation stress can be measured σ< sub> τ 0.2 5.The hardness in the table is the value of Brinell hardness HB10/3000 of steel in annealing or high temperature tempering supply state Heat treatment: quenching temperature 860 ° C oil cooling; Tempering temperature 500 ° C Water cooled, oil cooled |
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It has high strength and toughness, its strength is higher than that of 35 steel, its mechanical properties are basically similar to that of 30Cr, and its hardenability is slightly higher than that of 30Cr. It is usually used in the quenched and tempered state or after normalizing. It is used to manufacture important parts that work under wear and friction conditions or great impact loads, such as shafts, small shafts, balance levers, rocker bars, connecting rods, bolts, nuts, gears and various rollers.
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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