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4340 Round Bar

View SAE 4340 threaded rod Price Chart, Manufacturer of Alloy steel 4340 hex bar

Alloy steel is used to manufacture a wide variety of products. It consists of different elements that help in increasing hardness, strength, and wear resistance. 4340 Round Bar is one such category that can be machined in all states other than hardened stade. It is easy to weld them as well. They are used in heavy duty, aerospace, and automotive industries due to the quality of toughness displayed by them. 4340 chrome moly steel rods are also said to have high ductility and high strength. They are widely used in industrial applications as they provide strength and hardenability that other steel grades do not provide.

4340 Round Bar

SAE 4340 threaded rod

Alloy steel 4340 hex bar

Check availibility of 4340 Alloy steel Square, Rectangular, Bright bar stock in Hairline Finished

4340 alloy steel flat bar has good impact resistance and wears resistance in hardened conditions. The size range of these bars lies between ½ inches to 15 inches and are used in applications such as axle shaft, heavy-duty shaft, and mine drilling. 4340 square bar offers a reduction area of 35 to 45 %. It has a higher carbon content which gives the bar rigidity and heat treatment capabilities. Moreover, these 4340 Alloy Steel hex bars also display inferior weldability and an excellent response to quench. The bars produced by us at times have a small amount of vanadium which helps in enhancing the strength. They are available in 5 mm to 500 mm diameter.

Grade 4340 Annealed rectangular bar has a melting range of 1340 degrees C- 1380 degrees C. The iron based alloy used in it is immune to embrittlement. They are available in the size range of 30 mm to 160 mm. These AISI 4340 drill rods are tempered to ensure that they do not become brittle and at times quenched to confirm the hardness. The physical properties of this depend upon how long the product was tempered and how much.

4340 Round Bar

Don't forget to check 4340 Chrome moly steel Hex Rod Dimensions Chart, 34crnimo6 Round Bar cutting to 650mm Suppliers in Mumbai

4340 Round Bar Specification

Sizes 2-100mm A/F
Tolerance H9, H8, H10, K12, H13K9, K10, H11, H12, K11
Round bar Sizes Diameter: 3-~800mm
Technique Hot Rolled, Cold Drawn, Cold Rolled, Forged, Rod
Processing Bar cutting to 650mm
Surface Bright, Hot Rolled Pickled, Sand Blasting Finished, Hairline, Cold Drawn, Polished suppliers
Condition Hardened and tempered, annealed
Form Precision Square, Ingot, T-Bar, Rod, Round, Welding Rod, I/H Bar, Flat Bar, Blocks, Rings, Rectangle, Hex (A/F), Hollow, Threaded, Profiles, Ground Bar, Channel Bar, Billet, Triangle, Round Rod, Half Round Bar, Forging etc.
Square bar Sizes 4 to 100mm
Finish Hot rolled annealed, Bright, smooth turned, Polish, Rough Turned, Cold (bright) drawn, centreless ground, Grinding, peeled, hot rolled, slit rolled edge, Centreless Ground & Black.
Quick Delivery is available in the following cities Manama, London, Riyadh, Nagpur, Montreal, Istanbul, Howrah, Kolkata, Pimpri-Chinchwad, Perth, Bogota, Courbevoie, Kuwait, Kanpur, Baroda, Port-of-Spain, Gimhae-si, Chennai, Mexico, New Delhi, Gujarat, Ahmedabad, Lagos, Surat, India, Ranchi, Bangalore, Ahvaz, Karachi, Indore, Muscat, Janeiro, Noida, Thiruvananthapuram, Hyderabad, Santiago, Vadodara, Ankara, Abu Dhabi, Caracas, Calgary, Melbourne, Tehran, Khobar, Rajkot, Tau, Gurgaon, Dammam, Ludhiana, Mumbai, Ernakulam, Bengaluru, Ludhiana, Sydney, Jamshedpur, Coimbatore
Flat bar Sizes Width: 10 - 500 millimeter
Thick.: 2 to 100 millimeter

Composition Standard of SAE 4340 threaded rod

C Mn Si S P Cr Ni Mo
SAE - 4340 .38- .43 .60 - .80 .15 - .35 .035 MAX .040 MAX .70 - .90 1.65 -2.00 .20 - .30
Exporter of Low Alloy steel 4340 Polished Bar, We Supply UNS G43400 Black Bar in Hardened and tempered condition

Mechanical Strength of Alloy steel 4340 hex bar

Tensile strength kgf/mm² Yield strength kgf/mm² Elongation % Cross section reduction rate % Impact value Hardness Hb
≧100 ≧90 ≧16 ≧45 ≧7 293~352

4340 alloy steel flat bar Equivalent Material

Standard AISI / SAE 4340
UNS -
WERKSTOFF NR. 34CrNiMo6, 40NiCrMo8-4
BS 970 817M40, En24
UNI 35NiCrMo6 (KB), 40NiCrMo7 (KB)
JIS SNCM 447, SNB24-1-5
EN name 34CrNiMo6
EN # 1.6582, 1.6562

4340 chrome moly steel rod Surface Finish

CGCentreless groundHFHot finished
PR Peeled and reeled CF Cold finished
SRE Slit rolled edge P&T Peeled and turned
CDCold drawnPPolished
BDBright drawn ST Smooth turned
HRAP Hot rolled annealed and pickled RTRough turned/peeled
Know 34crnimo6 AISI 4340 Cold Drawn Round Bar Chemical Structure, Alloy 4340 Rod Manufacturer in India

Available of HR 4340 Alloy Steel Round Bars Types

4340 alloy steel flat bar

4340 alloy steel flat bar

4340 square bar

4340 square bar

4340 Alloy Steel hex bar

4340 Alloy Steel hex bar

Grade 4340 Annealed rectangular bar

Grade 4340 Annealed rectangular bar

AISI 4340 drill rod

AISI 4340 drill rod

4340 chrome moly steel rod

4340 chrome moly steel rod

4340 Alloy steel Square Bar

4340 Alloy steel Square Bar

4340 Chrome moly steel Hex Rod

4340 Chrome moly steel Hex Rod

UNS G43400 Black Bar

UNS G43400 Black Bar

4340 Heat Treated Round Bar

4340 Heat Treated Round Bar

Alloy Steel 4340 Hot Rolled Round Bar

Alloy Steel 4340 Hot Rolled Round Bar

SAE 4340 Angle Bar

SAE 4340 Angle Bar

Grade 4340 Rectangular Bar Surface Finish

CF Cold finished CD Cold drawn
ST Smooth turned CG Centreless ground
P&T Peeled and turned P Polished
SRE Slit rolled edge BD Bright drawn
RT Rough turned/peeled PR Peeled and reeled
HRAP Hot rolled annealed and pickled HF Hot finished

Alloy Steel 4340 Flat Bar Applications

  • Power Transmission Gears
  • Pharmaceuticals
  • Aircraft Landing Gear
  • Petrochemicals
  • Structural Use

4340 Ht Round Bar Size Chart

Types SIZES (Millimeter) SIZES (In) Tolerance (ISO)
Cold Drawn and Ground 10.00 – 75.00 5/6" – 2.50" h8-h9-h10-h11
Peeled and Ground 20.00 – 50.00 3/4″ – 2.00" h9-h10-h11
Peeled and Polished 40.00 – 150.00 1.50" – 6.00" h11, h11-DIN 1013
Cold Drawn and Polish 3.00 – 75.00 1/8" – 3.00" h8-h9-h10-h11

Marking on 4340 Annealed Round Bar

  • Material Designation
  • "WP" in grade symbol
  • Schedule no. or minimal wall thickness
  • Rating Designation
  • Manufacturer’s Symbol or Name
  • Grade
  • Heat Code

Physical Characteristics of 4340 Shaft Material

Melting Point (°F) 2600
Density (LB/IN 3) 0.292
Melting Point (°C) 1425
Density (G/CM 3) 8.08

AS 4340 Hollow Bar Tolerances

Form Size(mm) Process Tolerance
Round Φ6-Φ100 Cold Drawn Bright/Black Best H11
Φ16-Φ350 Hot Rolled Black -0/+1mm
Peeled/ground Best H11
Φ90-Φ1000 Hot Forged Black -0/+5mm
Rough Turned -0/+3mm
Flat/Square/Block Thickness :120-800 Hot Forged Black -0/+8mm
Width:120-1500 Rough Machined -0/+3mm

Condition of Alloy Steel 4340 Rod

ANN Annealed
H&T Hardened and tempered.
PH Precipitation hardened.

Supplier of 4340 Alloy Steel Bar in Standard Weights

Size (inch.) Wght / Foot (lbs) 4340 Round Bar Suppliers
1/4" 00.167
5/16" 00.261
3/8" 00.376
7/16" 00.511
1/2" 00.668
9/16" 00.845
5/8" 1.043
11/16" 1.262
3/4" 1.502
13/16" 1.763
7/8" 2.045
15/16" 2.347
1" 2.670
1 1/16" 3.015
1 1/8" 3.380
1 3/16" 3.766
1 1/4" 4.172
1 5/16" 4.600
1 3/8" 5.049
1 7/16" 5.518
1 1/2" 6.008
1 9/16" 6.519
1 5/8" 7.051
1 3/4" 8.178
1 7/8" 9.388
1 15/16" 10.020
2" 10.680
2 1/8" 12.060
2 1/4" 13.520
2 3/8" 15.060
2 7/16" 15.870
2 1/2" 16.690
2 5/8" 18.400
2 3/4" 21.130
2 7/8" 22.070
3" 25.050
3 1/4" 29.300
3 1/2" 33.890
3 3/4" 38.810
4" 44.070
4 1/4" 48.230
4 3/8" 51.110
4 1/2" 55.590

Alloy Steel Bar 4340 High Temperature Properties

For tempered and quenched heavy forgings

Diameter mm
Yield strength MPa
20 ℃ 100 ℃ 200 ℃ 250 ℃ 300 ℃ 350℃ 400℃
≤250 590 549 510 481 441 412 371
250-500 540 505 471 451 412 383 353
500-750 490 466 441 422 392 363 343

4340 Steel Bar Price List

Product Price
AISI 4340 Rod Bar 6-1/4 Dia X 1.2 Mtr Long $249.15/ Unit
Alloy Steel Bright Round Bars, (Grade :-AISI- 4340), (Length : 5.8 - 6.0 Meters) $0.70/ Kilogram
Alloy 4340 Size Square Corner 35mm Thickness 45.00 mm Width (Square Corner Steel Bar) $8.94/ Kilogram
80 mm Round Bar, ASTM A29, 4340 (Alloysteel) $128.12/ Piece

Many Grade 4340 Solid Bar suppliers, retailers, stockholders, distributors, exporters, dealers, stockists, wholesalers, and importers find your sizes in our stock of AS 4340 Hr Bar in Mumbai, Choose us for the best price of 4340 Alloy Steel Grade Hexagonal Bar in India, Contact for a Quick Quote!

SAE 4340 Forged Bar Thermal Properties

Thermal Expension Thermal Conductivity
12.3 um/m°C 44.5 W/mK

Thickness Chart of AISI 4340 Steel Hex Bar

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

SAE 4340 Square Bar Weights

Width or Dia.(millimetre) Wght / m Sectional Area Perimeter
Round
(kilogram)
Square
(kilogram)
Round
(centimetre²)
Square
(centimetre²)
Round
(centimeter)
Square
(centimeter)
5.0 0.15 0.20 0.20 0.25 1.57 2.0
5.5 0.19 0.24 0.24 0.30 1.78 2.2
6.0 0.22 0.28 0.28 0.36 1.88 2.4
7.0 0.30 0.38 0.38 0.49 2.20 2.8
8.0 0.39 0.50 0.50 0.64 2.51 3.2
9.0 0.50 0.64 0.64 0.81 2.83 3.6
10 0.63 0.73 0.79 1.00 3.14 4.0
11 0.75 0.95 0.95 1.21 3.46 4.4
12 0.89 1.13 1.13 1.44 3.77 4.8
14 1.21 1.54 1.54 1.96 4.40 5.6
16 1.58 2.01 2.01 2.56 5.03 6.4
18 2.00 2.54 2.54 3.24 5.65 7.2
20 2.47 3.14 3.14 4.00 6.28 8.0
22 2.98 3.80 3.80 4.84 6.91 8.8
25 3.85 4.91 4.91 6.25 7.85 10.0
28 4.83 6.15 6.16 7.84 8.80 11.2
32 6.31 8.04 8.04 10.24 10.05 12.8
36 7.99 10.17 10.18 12.96 11.31 14.4
40 9.86 12.56 12.57 16.00 12.57 16.0
45 12.49 15.90 15.90 20.25 14.14 18.0
50 15.41 19.62 19.64 25.00 15.71 20.0
56 19.34 24.62 24.63 31.36 17.59 22.4
63 24.47 31.16 31.17 36.69 19.79 25.2
71 31.08 39.57 39.59 50.41 22.31 28.4
80 39.46 50.24 50.27 64.00 25.13 32.0

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