Screw Bolt or Machine Parts Use Round Steel Bar

Oct 23, 2025

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Material and Dimension of round steel bar:

Material Dimension(mm) Material Dimension(mm)
8#-10# ∮16-290 65Mn ∮40-300
15# ∮14-150 45Mn2 ∮18-75
20# ∮8-480 60Si2Mn ∮16-150
35# ∮8-480 20CrMnTi ∮10-480
45# ∮6.5-480 20crmnTiB ∮16-75
Q235B ∮6.5-180 GCr15 ∮16-400
40Cr ∮8-480 ML35 ∮8-150
20Cr ∮10-480 T8-T13 ∮8-480
42CrMo ∮12-480 Cr12 ∮16-300
35CrMo ∮12-480 Cr12MoV ∮16-300
20CrMo ∮12-300 3Cr2W8V ∮16-300
38CrMoAL ∮20-300 45Cr50Cr ∮20-300
5CrMnMo ∮20-450 20CrMnMo ∮20-300
16Mn(Q345B) ∮14-365 40Mn2 ∮28-60
50Mn ∮40-200 35Cr ∮55
15CrMo ∮21∮24∮75 15Mn ∮32∮170
25# ∮16-280 40CrMnMo ∮80-∮160
YF45MnV ∮28-80 20CrMnMo ∮20-300
30# ∮6.5-480 27 SiMn ∮20-350
30Crmo ∮28 Crwmn ∮20-300
30CrmnTi ∮16-300 H13(4Cr5MoSiVi) ∮20-300
60# ∮210.∮260 40crNimo ∮20-400



WEIGHT OF Round steel bar:

OD(mm) Weight (kg/m) OD(mm) Weight(kg/m)
Round steel bar Round steel bar
5.5 0.186 13 1.04
6 0.222 14 1.21
6.5 0.26 15 1.39
7 0.302 16 1.58
8 0.395 17 1.78
9 0.499 18 2
10 0.617 19 2.23
* 11 0.746 20 2.47
12 0.888 21 2.72
22 2.98 63 24.5
* 23 3.26 * 65 26
24 3.55 * 68 28.5
25 3.85 70 30.2
26 4.17 75 34.7
* 27 4.49 80 39.5
28 4.83 85 44.5
* 29 5.18 90 49.9
30 5.55 95 55.6
* 31 5.92 100 61.7
32 6.31 105 68
* 33 6.71 110 74.6
34 7.13 115 81.5
* 35 7.55 120 88.8
36 7.99 125 96.3
38 8.9 130 104
40 9.86 140 121
42 10.9 150 139
45 12.5 160 158
48 14.2 170 178
50 15.4 180 200
53 17.3 190 223
* 55 18.6 200 247
56 19.3 220 298
* 58 20.7 250 385
60 22.2    

 

 

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1.What is round bar steel?

Round bar is a steel bar with a smooth surface which is used for construction that does not request high-strength reinforced concrete works. It is widely used on beam and column stirrups, pipelines, roads, small and medium-sized projects.

 

2.What is the difference between round bar and steel rod?

Round bars are typically made from hot-rolled steel, while rods usually come from cold-drawn steel. Round bars have a higher carbon content than rods, which gives them better strength and hardness properties. Rods have a higher manganese content than round bars, which gives them better wear resistance.

 

3.What is the difference between a round bar and a rebar?

Round steel and other types of rebars, such as deformed bars and square bars, differ in their shape, surface texture, and mechanical properties. Shape: Round steel bars are cylindrical in shape, while deformed bars have ridges or deformations on their surface that provide better grip and bonding with concrete.

 

4.How strong is a round bar?

Compressive Strength
Round Bars: Round bars handle compressive loads very well because their shape helps distribute stress evenly. This makes them especially good for applications where the pressure is centred, as it helps them resist bending or deforming under heavy loads.

 

5.Which is stronger, round bar or square bar?

Steel square bars are known to be stronger due to their geometrical shape. They are also able to handle more pressure than round bars. The stainless square bars have a finish that makes them perfect for being used in different industries.