| Type: | Alloy Steel Bar |
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| Standard: | AISI, ASTM, GB, JIS, DIN, BS |
| Technique: | Hot Rolled |
| Application: | Structural Steel Bar, Tool Steel Bar, Die Steel Bar |
| Surface Treatment: | Black/Peeling/Polishing/Machining/Grinding/Turning |
| Alloy: | Alloy |
| Samples: |
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| Customization: |
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AISI 4140 steel is a low alloy steel containing chromium, molybdenum, and manganese. It is widely used across numerous industries and is an excellent material choice due to its toughness, high fatigue strength, and abrasion and impact resistance. Not many grades can match the versatility and usefulness of 4140.
| composition | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| Q195 | ≤0.12 | ≤0.3 | ≤0.5 | ≤0.035 | ≤0.04 | ≤0.3 | ≤0.3 | ≤0.3 | - |
| Q235 | ≤0.22 | ≤0.35 | ≤1.4 | ≤0.045 | ≤0.5 | ≤0.3 | ≤0.3 | ≤0.3 | - |
| Q345 | ≤0.2 | ≤0.5 | ≤17 | ≤.035 | ≤0.0335 | ≤0.3 | ≤0.5 | ≤0.3 | - |
| Q390 | ≤0.2 | ≤0.5 | ≤1.7 | ≤0.035 | ≤0.035 | ≤0.3 | ≤0.5 | ≤0.3 | ≤0.1 |
| 10# | 0.07-0.13 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.03 | ≤0.15 | ≤0.3 | ≤0.3 | - |
| 15# | 0.12-0.18 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.03 | ≤0.2 | ≤0.3 | ≤0.25 | - |
| 20# | 0.17-0.23 | 0.17-0.37 | 0.35-0.65 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 25# | 0.22-0.29 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 30# | 0.27-0.34 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 35# | ≤0.17 | ≤0.35 | ≤1.4 | ≤0.04 | ≤0.04 | ≤0.3 | ≤0.3 | ≤0.3 | - |
| 40# | 0.37-0.44 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 45# | 0.42-0.5 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 55# | 0.52-0.6 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.3 | ≤0.25 | - |
| 16Mn | 0.13-0.2 | 0.2-0.6 | 1.2-1.6 | ≤0.025 | ≤0.01 | ≤0.3 | ≤0.3 | ≤0.2 | |
| 20Cr | 0.18-0.24 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.7-1 | ≤0.3 | ≤0.3 | ≤0.15 |
| 40Cr | 0.37-0.44 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | ≤0.15 |
| 15CrMo | 0.12-0.18 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.4-0.55 |
| 20CrMo | 0.17-0.24 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.15-0 .25 |
| 30CrMo/4130/SCM420/25CrMo4/1.7218 | 0.26-0.34 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.15-0.25 |
| 35CrMo | 0.32-0.4 | 0.17-0.37 | 0.4-0.7 | ≤0.035 | ≤0.035 | 0.8-1.1 | ≤0.3 | ≤0.3 | 0.15-0.25 |
| 42CrMo/4140 | 0.38-0.45 | 0.17-0.37 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.9-1.2 | ≤0.3 | ≤0.3 | 0.15-0.25 |
| 5120 | 0.17-0.22 | 0.15-0.35 | 0.7-0.9 | ≤0.035 | ≤0.035 | 0.7-0.9 | ≤0.25 | ≤0.35 | ≤0.06 |
| Material Science: | Hot rolled/cold drawn/forged steel round steel |
| Process: | It is forged from vacuum degassed steel ingot. |
| Diameter: | 25mm - 1000mm (optional) |
| Length: | 1000mm-12000mm Straightness:3mm/M max(optional) |
| Process: | EAF+LF+VD+forging+heat treatment (optional) |
| Delivery conditions: | Hot forging+rough machining (black surface after Q/T)+double tempering. |
| Delivery time | 15-25 days |
| Minimum order quantity: | 5 tons |
| Heat treatment: | Normalizing/annealing/quenching/tempering (optional) |
| Technical data: | Chemical composition, physical properties and mechanical tests according to customer requirements |
| characteristic: | According to your requirements |
| Test: | Ultrasonic test according to SEP 1921-84 C/c and D/d (optional) |
| Tag: | Grade, heat resistant NO The length will be printed with the required color on each bar |
| Payment: | T T 30% in advance; The balance shall be paid against shipping documents or irrevocable letter of credit at sight before shipment |
| Terms of trade | FOB,C&F,EXW... |
| Properties | Metric | Imperial |
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
30CrMo/A30302/30XM/SCM430 /4130 |
It is used to manufacture conduits with working temperature below 400 ° C, fasteners with working temperature below 450qC in boilers and steam turbines, nuts and flanges with working temperature below 500 ° C and high pressure, main shafts, shafts, gears, bolts, studs and control wheels with large load in general machinery, high-pressure conduits and weldments with working temperature below 250 ° C in chemical equipment and nitrogen and hydrogen media |
35CrMo/A30252/35XM/SCM435/4135/34CrMo4/1.7220 |
It is used to manufacture important parts in various machines that bear impact, bending and high load. Such as herringbone gear of steel rolling mill, crankshaft, hammer rod, connecting rod, fastener, main shaft and axle of steam turbine engine, engine transmission parts, large electric sleeper shaft, piercer in petroleum machinery, bolts for boiler with working temperature lower than 400 ° C, nuts with working temperature lower than 510 ° C, high-pressure seamless thick-walled pipe in chemical machinery (temperature 450-500 ° C, no corrosive medium), etc., can also replace 40CrNi for manufacturing high load transmission shaft Turbogenerator rotor, large section gear, support shaft (diameter less than 500mm), etc |
42CrMo/A30422/38XM/SCM440/4142/4140/42CrMo4/1.7225 |
It is generally used for manufacturing important parts with higher strength requirements and larger section size than 35CrMo, such as shaft, gear, connecting rod, gearbox gear, supercharger gear, engine cylinder, spring, spring clip, 1200, 2000mm oil drill pipe joint, fishing tool and replacing quenched and tempered steel with higher nickel content |
This alloy finds many applications as forgings for the aerospace and oil and gas industries, along with myriad uses in the
automotive, agricultural and defense industries, Typical uses are forged gears and shafts, spindles, fixtures, jigs and collars.
Heat Treatment
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 drawing
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Audited Supplier 
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