At Esha Steel, a leading manufacturer and supplier in Kolkata, we provide premium Alloy Steel F21 Bars to industries across India. Manufactured according to ASTM and ASME standards, these bars are engineered for high-temperature and high-pressure applications, ensuring reliable performance and long-term durability. Esha Steel ensures precise dimensions, stringent quality control, and superior mechanical properties. Widely used in power plants, petrochemical facilities, and industrial machinery, F21 bars deliver excellent toughness, corrosion resistance, and weldability, making them ideal for fabricating critical components, shafts, and structural parts in demanding industrial environments requiring strength and safety.
Alloy Steel F21 Bars are made from chromium-molybdenum low-alloy steel with controlled carbon, manganese, phosphorus, sulfur, and silicon content. This composition provides excellent high-temperature strength, toughness, and resistance to creep and corrosion. Mechanically, F21 bars offer tensile strength of 585–760 MPa, yield strength of 415–620 MPa, and good elongation with high impact resistance. Heat treatment enhances hardness, dimensional stability, and mechanical performance. Their uniform microstructure ensures excellent weldability, machinability, and durability, making F21 bars suitable for high-pressure and high-temperature industrial applications requiring reliable performance and long-term service life.
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type |
Alloy Steel ASTM A182 F21 Round Bars |
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Type |
rod, square bar, Round bar, hexagon bar, flat bar, channel bar, angle bar, threaded bar |
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Standards |
Alloy Steel ASTM A182 F22 , A479, A314, GB4226-84, GB/T1220-2007, JISG4311-91, JIS G4318-98, ENÂ 10095-99, GB4226-84, EN10088-3-2005, JIS G3033-2005, etc |
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Surface |
bright round bar, pickled round bar, black round bar |
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Package Details |
Standard seaworthy package(wooden boxes package,pvc package, or other package) |
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Technique |
Forged/Hot Rolled/Cold Drawn/Peeled |
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Range |
Range – 3.17mm to 350mm dia |
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Diameter |
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Length |
1m-9m or according to the customer’s requirement |
| Grade | C | Mn | Si | Mo | P | Cr |
| ASTM A182 F21 | 0.05 – 0.15 | 0.30 – 0.60 | 0.50 max | 0.87 – 1.13 | 0.040 | 2.00 – 2.50 |
| Tensile Strength (ksi) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (ksi) min |
| 570 | 23 | 295 |
| STANDARD | WERKSTOFF NR. | UNS |
| ASTM A182 F21 | 1.7380 | K21590 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
|
SIZE IN INCHES |
ROUND |
SQUARE |
OCTAGON |
HEXAGON |
SIZE IN INCHES |
ROUND |
SQUARE |
OCTAGON |
HEXAGON |
|
1/16 |
.010 |
.013 |
.011 |
.012 |
11/16 |
1.262 |
1.607 |
1.333 |
1.392 |
|
5/64 |
.017 |
.022 |
.018 |
.019 |
45/64 |
1.320 |
1.681 |
1.394 |
1.456 |
|
3/32 |
.023 |
.029 |
.024 |
.025 |
23/32 |
1.380 |
1.756 |
1.487 |
1.521 |
|
7/64 |
.031 |
.039 |
.033 |
.034 |
47/64 |
1.440 |
1.834 |
1.521 |
1.588 |
|
1/8 |
.042 |
.053 |
.044 |
.046 |
3/4 |
1.502 |
1.913 |
1.586 |
1.656 |
|
9/64 |
.053 |
.067 |
.056 |
.058 |
25/32 |
1.630 |
2.075 |
1.721 |
1.797 |
|
5/32 |
.065 |
.083 |
.069 |
.072 |
13/16 |
1.763 |
2.245 |
1.862 |
1.944 |
|
11/64 |
.079 |
.100 |
.083 |
.087 |
27/32 |
1.901 |
2.421 |
2.008 |
2.096 |
|
3/16 |
.094 |
.120 |
.099 |
.104 |
7/8 |
2.045 |
2.603 |
2.159 |
2.254 |
|
13/64 |
.110 |
.140 |
.116 |
.121 |
29/32 |
2.193 |
2.792 |
2.316 |
2.418 |
|
7/32 |
.128 |
.163 |
.135 |
.141 |
15/16 |
2.347 |
2.988 |
2.479 |
2.588 |
|
15/64 |
.147 |
.187 |
.155 |
.162 |
31/32 |
2.506 |
3.191 |
2.646 |
2.763 |
|
1/4 |
.167 |
.213 |
.176 |
.184 |
1 |
2.670 |
3.400 |
2.820 |
2.945 |
|
17/64 |
.188 |
.240 |
.199 |
.207 |
1-1/16 |
3.015 |
3.838 |
3.183 |
3.324 |
|
9/32 |
.211 |
.269 |
.223 |
.233 |
1-1/8 |
3.380 |
4.303 |
3.569 |
3.727 |
|
19/64 |
.235 |
.300 |
.248 |
.259 |
1-3/16 |
3.766 |
4.795 |
3.977 |
4.152 |
|
5/16 |
.261 |
.332 |
.275 |
.288 |
1-1/4 |
4.172 |
5.313 |
4.407 |
4.601 |
|
21/64 |
.288 |
.360 |
.304 |
.318 |
1-5/16 |
4.600 |
5.857 |
4.858 |
5.072 |
|
11/32 |
.316 |
.402 |
.334 |
.348 |
1-3/8 |
5.049 |
6.428 |
5.332 |
5.567 |
|
23/64 |
.345 |
.439 |
.364 |
.381 |
1-7/16 |
5.518 |
7.026 |
5.827 |
6.085 |
|
3/8 |
.376 |
.478 |
.397 |
.414 |
1-1/2 |
6.008 |
7.650 |
6.345 |
6.625 |
|
25/64 |
.408 |
.519 |
.431 |
.450 |
1-9/16 |
6.519 |
8.301 |
6.885 |
7.189 |
|
13/32 |
.441 |
.561 |
.466 |
.486 |
1-5/8 |
7.051 |
8.978 |
7.446 |
7.775 |
|
27/64 |
.475 |
.605 |
.502 |
.524 |
1-11/16 |
7.604 |
9.682 |
8.030 |
8.385 |
|
7/16 |
.511 |
.651 |
.540 |
.564 |
1-3/4 |
8.178 |
10.41 |
8.634 |
9.018 |
|
29/64 |
.548 |
.698 |
.579 |
.604 |
1-13/16 |
8.773 |
11.17 |
9.265 |
9.673 |
|
15/32 |
.587 |
.747 |
.620 |
.647 |
1-7/8 |
9.388 |
11.95 |
9.911 |
10.35 |
|
31/64 |
.627 |
.798 |
.662 |
.692 |
1-15/16 |
10.02 |
12.76 |
10.58 |
11.05 |
|
1/2 |
.668 |
.850 |
.705 |
.736 |
2 |
10.68 |
13.60 |
11.28 |
11.78 |
|
33/64 |
.710 |
.904 |
.750 |
.783 |
2-1/16 |
11.36 |
14.46 |
11.99 |
12.53 |
|
17/32 |
.754 |
.960 |
.796 |
.831 |
2-1/8 |
12.06 |
15.35 |
12.73 |
13.30 |
|
35/64 |
.799 |
1.017 |
.844 |
.881 |
2-3/16 |
12.78 |
16.27 |
13.49 |
14.09 |
|
9/16 |
.845 |
1.076 |
.892 |
.932 |
2-1/4 |
13.52 |
17.21 |
14.27 |
14.91 |
|
37/64 |
.893 |
1.136 |
.943 |
.985 |
2-5/16 |
14.28 |
18.18 |
15.08 |
15.75 |
|
19/32 |
.941 |
1.199 |
.994 |
1.038 |
2-3/8 |
15.06 |
19.18 |
15.91 |
16.61 |
|
39/64 |
.992 |
1.263 |
1.048 |
1.094 |
2-7/16 |
15.87 |
20.20 |
16.75 |
17.49 |
|
5/8 |
1.043 |
1.328 |
1.102 |
1.150 |
2-1/2 |
16.69 |
21.25 |
17.62 |
18.40 |
|
41/64 |
1.096 |
1.395 |
1.207 |
1.209 |
2-9/16 |
17.53 |
22.33 |
18.52 |
19.34 |
|
21/32 |
1.150 |
1.464 |
1.214 |
1.268 |
2-5/8 |
18.40 |
23.43 |
19.43 |
20.29 |
|
43/64 |
1.205 |
1.535 |
1.272 |
1.329 |
2-11/16 |
19.29 |
24.56 |
20.37 |
21.27 |
Esha Steel is a top manufacturer and supplier of high-quality Alloy Steel F21 Bars products in Kolkata India. Specializing in steel solutions, we provide a wide range of products, including Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel. Our offerings include Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates. Known for our reliable delivery and superior customer service, we are committed to offering top-tier steel materials that ensure durability and performance across a wide range of industrial applications. We strive to meet the highest standards, making us a trusted partner for all your steel needs.
Alloy Steel F21 Bars are widely used in high-pressure and high-temperature industrial components, shafts, fasteners, mechanical assemblies, and structural parts. They are ideal for fabricating components for boilers, steam turbines, petrochemical plants, and power generation equipment. F21 bars are suitable for industrial machinery, structural supports, and process equipment where durability, mechanical strength, and thermal resistance are essential. With excellent weldability, corrosion resistance, and toughness, these bars ensure long-lasting, reliable performance. Engineers and fabricators rely on F21 bars to manufacture safe, high-performance components capable of withstanding extreme operating conditions and ensuring the longevity of critical industrial systems.
Esha Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Kolkata India.
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