Alloy Steel Round Bar Manufacturer in India
Unifit Fastener alloy steel round bars are produced with the best quality alloy steel to provide an excellent combination of strength, toughness, and durability. These cylindrical bars are solid and have a large variety of grades, sizes, and specifications, which makes them suitable in the case of hard-working industries. Together with the alloy steel round bars, Unifit Fastener is the distributor of duplex steel, nickel alloy, and titanium round bars to satisfy the various engineering needs among global markets.
Our alloy steel round bars (alloy steel) are manufactured according to the international requirements, including ASTM A182 and ASME SA182, and their dimensional tolerances are in accordance with EN, DIN, JIS, BS, and AISI requirements. Our product is available with a variety of diameters between 5 mm and 500 mm and lengths from 100 mm to 6000 mm with the choice of a black finish, bright polished finish, and rough turn to meet various machining and fabrication requirements.
Alloying elements are melted under control to produce the material, which is then cast into billet metal and subjected to some hot rolling or forging, and this is followed by a specific heat treatment. The cold finishing and strict quality control of every bar before its dispatch are accompanied by proper measurements and excellent mechanical properties.
There are grades like ASTM A182 F11, F5, F12, F22, F91, DIN 1.7218, DIN 1.7228, and EN 25CrMo4. These alloy steel round bars are high-strength, wear-resistant, corrosion-resistant, and heat-tolerant and are very popular in automotive, aerospace, construction, marine, defense, fasteners, gears, shafts, and heavy engineering components.
Request QuoteTable of Contents
- Material Grades of Alloy Steel Round Bars
- Specification of Alloy Steel Round Bar
- Types of Alloy Steel Round Bar
- Chemical Composition of Alloy Steel Round Bar
- Mechanical Properties of Alloy Steel Round Bar
- Send Your Enquiry
- SAE 4140 Rod Grade
- Hot Rolled Alloy Steel Round Bars Sizes (in mm)
- Alloy Steel Round Bar Diameter Availability (mm)
- Alloy Steel 42CrMo4 Round Bar Dimensions Standard
- Applications & Uses of Alloy Steel Round Bars
- People Ask About Alloy Steel Round Bars
Material Grades of Alloy Steel Round Bars
Specification of Alloy Steel Round Bar
| Specification | Details |
|---|---|
| Thickness | 0.5 mm – 500 mm Dia |
| Range | 5 mm – 500 mm Diameter in 100 mm – 6000 mm Length |
| Diameter | 10 mm – 200 mm |
| Dimensions | DIN, EN, JIS, BS, ASTM, AISI, ASME |
| Length | 1000 mm to 6000 mm Long |
| Form | Square, Round, Hex (A/F), Billet, Rectangle, Ingot, Forging etc. |
| Finish | Black, Rough Turned, Bright Polished, Matt Finish, NO.4 Finish, BA Finish |
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Types of Alloy Steel Round Bar
SAE 8620 Round Bar
Alloy Steel F91 Round Bar
Alloy Steel F22 Round Bar
Alloy Steel F12 Round Bar
Alloy Steel F11 Round Bar
4330V Round Bar
4320 Round Bar
41Cr4 Round Bar
4150 Round Bar
4145 Round Bar
4135 Round Bar
4130 Round Bar
Chemical Composition of Alloy Steel Round Bar
| Grade | C (%) | Mn (%) | Si (%) | Cr (%) | Mo (%) | Ni (%) | V (%) | P (%) | S (%) |
|---|---|---|---|---|---|---|---|---|---|
| Alloy Steel F11 | 0.05 – 0.15 | 0.30 – 0.60 | 0.50 – 1.00 | 1.00 – 1.50 | 0.44 – 0.65 | — | — | ≤ 0.025 | ≤ 0.025 |
| Alloy Steel F12 | 0.05 – 0.20 | 0.30 – 0.60 | 0.50 – 1.00 | 0.80 – 1.25 | 0.44 – 0.65 | — | — | ≤ 0.025 | ≤ 0.025 |
| Alloy Steel F22 | 0.05 – 0.15 | 0.30 – 0.60 | 0.50 – 1.00 | 2.00 – 2.50 | 0.87 – 1.13 | — | — | ≤ 0.025 | ≤ 0.025 |
| Alloy Steel F91 | 0.08 – 0.12 | 0.30 – 0.60 | 0.20 – 0.50 | 8.00 – 9.50 | 0.85 – 1.05 | — | 0.18 – 0.25 | ≤ 0.020 | ≤ 0.010 |
| SAE 8620 | 0.18 – 0.23 | 0.70 – 0.90 | 0.15 – 0.35 | 0.40 – 0.60 | 0.15 – 0.25 | 0.40 – 0.70 | — | ≤ 0.035 | ≤ 0.040 |
| 4330V | 0.28 – 0.33 | 0.40 – 0.70 | 0.15 – 0.35 | 0.75 – 1.00 | 0.30 – 0.45 | 1.65 – 2.00 | 0.07 – 0.12 | ≤ 0.025 | ≤ 0.025 |
| 9310 | 0.08 – 0.13 | 0.45 – 0.65 | 0.15 – 0.35 | 1.20 – 1.50 | 0.08 – 0.15 | 3.00 – 3.50 | 0.07 – 0.12 | ≤ 0.025 | ≤ 0.025 |
| 4320 | 0.17 – 0.23 | 0.40 – 0.60 | 0.15 – 0.35 | 0.40 – 0.60 | 0.20 – 0.30 | 1.65 – 2.00 | — | ≤ 0.035 | ≤ 0.040 |
| 41Cr4 | 0.38 – 0.45 | 0.60 – 0.90 | 0.10 – 0.40 | 0.90 – 1.20 | ≤ 0.10 | — | — | ≤ 0.025 | ≤ 0.035 |
| 4150 | 0.48 – 0.53 | 0.75 – 1.00 | 0.15 – 0.35 | 0.80 – 1.10 | 0.15 – 0.25 | — | — | ≤ 0.035 | ≤ 0.040 |
| 4135 | 0.33 – 0.38 | 0.40 – 0.70 | 0.15 – 0.35 | 0.80 – 1.10 | 0.15 – 0.25 | — | — | ≤ 0.035 | ≤ 0.040 |
| 4130 | 0.28 – 0.33 | 0.40 – 0.60 | 0.15 – 0.35 | 0.80 – 1.10 | 0.15 – 0.25 | — | — | ≤ 0.035 | ≤ 0.040 |
Mechanical Properties of Alloy Steel Round Bar
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| Alloy Steel F11 | 415 – 585 | 205 – 275 | 20 | 143 – 197 |
| Alloy Steel F12 | 485 – 655 | 275 – 345 | 18 | 163 – 217 |
| Alloy Steel F22 | 620 – 760 | 415 – 485 | 18 | 197 – 241 |
| Alloy Steel F91 | 620 – 760 | 415 – 585 | 20 | 190 – 240 |
| SAE 8620 | 885 – 1080 | 580 – 720 | 15 – 20 | 217 – 255 |
| 4330V | 930 – 1080 | 825 – 930 | 13 – 16 | 260 – 302 |
| 9310 | 930 – 1080 | 790 – 930 | 12 – 15 | 269 – 321 |
| 4320 | 885 – 1030 | 685 – 860 | 18 | 217 – 255 |
| 41Cr4 | 800 – 1000 | 650 – 800 | 12 – 16 | 207 – 255 |
| 4150 | 850 – 1000 | 655 – 830 | 12 – 15 | 223 – 255 |
| 4135 | 700 – 900 | 460 – 650 | 15 – 20 | 197 – 255 |
| 4130 | 560 – 670 | 435 – 515 | 18 – 25 | 187 – 241 |
SAE 4140 Rod Grade
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| Alloy Steel P5 | 1.7362 | K41545 |
| Alloy Steel P9 | 1.7386 | S50400 |
| 42CrMo4 Round Bar | 42CrMo4 | — |
| Alloy Steel P11 | 1.7338 | K11597 |
Hot Rolled Alloy Steel Round Bars Sizes (in mm)
| Type | Sizes (mm) | Sizes (Inches) | ISO Tolerance |
|---|---|---|---|
| Cold Drawn and Ground | 10.00 – 75.00 | 5/6″ – 2.50″ | h8, h9, h10, h11 |
| Peeled and Polished | 40.00 – 150.00 | 1.50″ – 6.00″ | h11, h11 – DIN 1013 |
| Peeled and Ground | 20.00 – 50.00 | 3/4″ – 2.00″ | h9, h10, h11 |
| Cold Drawn and Polished | 3.00 – 75.00 | 1/8″ – 3.00″ | h8, h9, h10, h11 |
Alloy Steel Round Bar Diameter Availability (mm)
| Minimum (mm) | Maximum (mm) |
|---|---|
| 5.0 | 45.0 |
| 6.0 | 50.0 |
| 7.0 | 55.0 |
| 8.0 | 60.0 |
| 9.0 | 65.0 |
| 10.0 | 70.0 |
| 12.0 | 75.0 |
| 16.0 | 80.0 |
| 20.0 | 90.0 |
| 25.0 | 100.0 |
| 30.0 | 130.0 |
| 35.0 | 160.0 |
| 40.0 | 200.0 |
Alloy Steel 42CrMo4 Round Bar Dimensions Standard
| Diameter / Width (mm) | Weight per Meter – Square (kg) | Weight per Meter – Round (kg) | Sectional Area – Square (cm²) | Sectional Area – Round (cm²) | Perimeter – Square (cm) | Perimeter – Round (cm) |
|---|---|---|---|---|---|---|
| 5.0 | 0.20 | 0.15 | 0.25 | 0.20 | 2.0 | 1.57 |
| 5.5 | 0.24 | 0.19 | 0.30 | 0.24 | 2.2 | 1.78 |
| 6.0 | 0.28 | 0.22 | 0.36 | 0.28 | 2.4 | 1.88 |
| 7.0 | 0.38 | 0.30 | 0.49 | 0.38 | 2.8 | 2.20 |
| 8.0 | 0.50 | 0.39 | 0.64 | 0.50 | 3.2 | 2.51 |
| 9.0 | 0.64 | 0.50 | 0.81 | 0.64 | 3.6 | 2.83 |
| 10 | 0.73 | 0.63 | 1.00 | 0.79 | 4.0 | 3.14 |
| 11 | 0.95 | 0.75 | 1.21 | 0.95 | 4.4 | 3.46 |
| 12 | 1.13 | 0.89 | 1.44 | 1.13 | 4.8 | 3.77 |
| 14 | 1.54 | 1.21 | 1.96 | 1.54 | 5.6 | 4.40 |
| 16 | 2.01 | 1.58 | 2.56 | 2.01 | 6.4 | 5.03 |
| 18 | 2.54 | 2.00 | 3.24 | 2.54 | 7.2 | 5.65 |
| 20 | 3.14 | 2.47 | 4.00 | 3.14 | 8.0 | 6.28 |
| 22 | 3.80 | 2.98 | 4.84 | 3.80 | 8.8 | 6.91 |
| 25 | 4.91 | 3.85 | 6.25 | 4.91 | 10.0 | 7.85 |
| 28 | 6.15 | 4.83 | 7.84 | 6.16 | 11.2 | 8.80 |
| 32 | 8.04 | 6.31 | 10.24 | 8.04 | 12.8 | 10.05 |
| 36 | 10.17 | 7.99 | 12.96 | 10.18 | 14.4 | 11.31 |
| 40 | 12.56 | 9.86 | 16.00 | 12.57 | 16.0 | 12.57 |
| 45 | 15.90 | 12.49 | 20.25 | 15.90 | 18.0 | 14.14 |
| 50 | 19.62 | 15.41 | 25.00 | 19.64 | 20.0 | 15.71 |
| 56 | 24.62 | 19.34 | 31.36 | 24.63 | 22.4 | 17.59 |
| 63 | 31.16 | 24.47 | 36.69 | 31.17 | 25.2 | 19.79 |
| 71 | 39.57 | 31.08 | 50.41 | 39.59 | 28.4 | 22.31 |
| 80 | 50.24 | 39.46 | 64.00 | 50.27 | 32.0 | 25.13 |
Applications & Uses of Alloy Steel Round Bars
- Automotive Industry : Alloy steel round bars are widely used in the automotive sector for manufacturing crankshafts, axles, gears, shafts, fasteners, and suspension components due to their high strength and wear resistance.
- Aerospace Industry : In aerospace applications, alloy steel round bars are used for high-load and high-temperature components where reliability, toughness, and dimensional accuracy are critical.
- Construction and Infrastructure : These round bars are used in structural frameworks, anchor bolts, support systems, and heavy-duty fasteners that require excellent load-bearing capacity.
- Oil & Gas Industry : Alloy steel round bars are suitable for valves, flanges, studs, and pressure-containing components due to their resistance to heat, pressure, and corrosive environments.
- Power Generation Sector : Used in turbines, boilers, and mechanical assemblies, alloy steel round bars offer durability and thermal stability in power plants.
- Marine Industry : Their corrosion resistance and strength make them ideal for marine hardware, shafts, and offshore components exposed to harsh seawater conditions.
- Defense and Heavy Engineering : Alloy steel round bars are used in defense equipment, heavy machinery parts, and high-stress engineering components.
- Tool, Die, and Machine Manufacturing : Due to good machinability and hardness, these bars are ideal for producing tools, dies, molds, and precision machine parts.
People Ask About Alloy Steel Round Bars
What are alloy steel round bars?
Alloy steel round bars are solid cylindrical bars made from steel alloyed with elements such as chromium, molybdenum, and nickel to enhance strength, hardness, and corrosion resistance.
What sizes are available?
Round bars are available in diameters from 5 mm to 500 mm and lengths up to 6000 mm.
What surface finishes can be supplied?
Common finishes include black, bright polished, and rough turns.
What are the key advantages of alloy steel round bars?
They offer high tensile strength, excellent wear resistance, good heat tolerance, corrosion resistance, and superior machinability.
Which grades are commonly supplied?
Popular grades include ASTM A182 F11, F12, F22, F91, DIN 1.7218, DIN 1.7228, and EN 25CrMo4.