Steel round bar weight table: mass per metre, cross-section, metres per tonne

December 11, 2017 | Views: 551 |

When ordering a steel round bar, you need to determine the exact quantity in weight equivalent. The table below covers diameters from 5 to 270 mm and shows mass per 1 metre, cross-sectional area and metres per tonne.

Data calculated for specific gravity 7,850 kg/m³ (grades St3, 09G2S, 20, 40 etc.). For other grades use Table 2 or the online calculator on the catalogue page.

Table 1. Steel round bar weight table

Round bar weight and metres per tonne

Ø, mm	Cross-section, mm²	Mass per 1 m, kg	Metres per tonne
Coils (5–9 mm)
5 mm	19.63	0.154	6,487.8
5.5 mm	23.76	0.187	5,361.9
6 mm	28.27	0.222	4,505.4
6.3 mm	31.17	0.245	4,086.6
6.5 mm	33.18	0.260	3,839.0
7 mm	38.48	0.302	3,310.1
8 mm	50.27	0.395	2,534.3
9 mm	63.62	0.499	2,002.4
Bars (10–270 mm)
10 mm	78.54	0.617	1,622.0
11 mm	95.03	0.746	1,340.5
12 mm	113.10	0.888	1,126.4
13 mm	132.73	1.042	959.7
14 mm	153.94	1.208	827.5
15 mm	176.71	1.387	720.9
16 mm	201.06	1.578	633.6
17 mm	226.98	1.782	561.2
18 mm	254.47	1.998	500.6
19 mm	283.53	2.226	449.3
20 mm	314.16	2.466	405.5
21 mm	346.36	2.719	367.8
22 mm	380.13	2.984	335.1
23 mm	415.48	3.261	306.6
24 mm	452.39	3.551	281.6
25 mm	490.87	3.853	259.5
26 mm	530.93	4.168	239.9
27 mm	572.56	4.495	222.5
28 mm	615.75	4.834	206.9
29 mm	660.52	5.185	192.9
30 mm	706.89	5.549	180.2
31 mm	754.77	5.925	168.8
32 mm	804.25	6.313	158.4
33 mm	855.30	6.714	148.9
34 mm	907.92	7.127	140.3
35 mm	962.11	7.553	132.4
36 mm	1,017.88	7.990	125.2
37 mm	1,075.21	8.440	118.5
38 mm	1,134.11	8.903	112.3
39 mm	1,194.96	9.378	106.6
40 mm	1,256.64	9.865	101.4
41 mm	1,320.25	10.364	96.5
42 mm	1,385.44	10.876	91.9
43 mm	1,452.20	11.400	87.7
44 mm	1,520.53	11.936	83.8
45 mm	1,590.43	12.485	80.1
46 mm	1,661.90	13.046	76.7
47 mm	1,734.90	13.619	73.4
48 mm	1,809.56	14.205	70.4
50 mm	1,963.50	15.413	64.9
52 mm	2,123.72	16.671	60.0
53 mm	2,206.18	17.319	57.7
54 mm	2,290.22	17.978	55.6
55 mm	2,375.83	18.650	53.6
56 mm	2,463.01	19.335	51.7
58 mm	2,642.08	20.740	48.2
60 mm	2,827.43	22.195	45.1
62 mm	3,019.07	23.700	42.2
63 mm	3,117.25	24.470	40.9
65 mm	3,318.31	26.049	38.4
67 mm	3,525.65	27.676	36.1
68 mm	3,631.68	28.509	35.1
70 mm	3,848.45	30.210	33.1
72 mm	4,071.50	31.961	31.3
75 mm	4,417.86	34.680	28.8
78 mm	4,778.36	37.510	26.7
80 mm	5,026.55	39.458	25.3
82 mm	5,281.02	41.456	24.1
85 mm	5,674.50	44.545	22.4
87 mm	5,944.68	46.666	21.4
90 mm	6,361.73	49.940	20.0
92 mm	6,647.61	52.184	19.2
95 mm	7,088.22	55.643	18.0
97 mm	7,389.81	58.010	17.2
100 mm	7,853.98	61.654	16.2
105 mm	8,659.01	67.973	14.7
110 mm	9,503.32	74.601	13.4
115 mm	10,386.89	81.537	12.3
120 mm	11,309.73	88.781	11.3
125 mm	12,271.85	96.334	10.4
130 mm	13,273.23	104.195	9.6
135 mm	14,313.88	112.364	8.9
140 mm	15,393.80	120.841	8.3
145 mm	16,513.00	129.627	7.7
150 mm	17,671.46	138.721	7.2
155 mm	18,869.19	148.123	6.8
160 mm	20,106.19	157.834	6.3
165 mm	21,382.46	167.852	6.0
170 mm	22,698.01	178.179	5.6
175 mm	24,052.82	188.815	5.3
180 mm	25,446.90	199.758	5.0
185 mm	26,880.25	211.010	4.7
190 mm	28,352.87	222.570	4.5
195 mm	29,864.77	234.438	4.3
200 mm	31,415.93	246.615	4.1
210 mm	34,636.06	271.893	3.7
220 mm	38,013.27	298.404	3.4
230 mm	41,547.56	326.148	3.1
240 mm	45,238.93	355.126	2.8
250 mm	49,087.39	385.336	2.6
260 mm	53,092.92	416.779	2.4
270 mm	57,255.53	449.456	2.2

How to calculate the weight yourself

Formula for mass per 1 metre of steel round bar:

M = (π × d² / 4) × ρ

where: M — mass per 1 m (kg); d — diameter (m); ρ — specific gravity of steel (kg/m³).

Example: round bar Ø40 mm, grade St3 (ρ = 7,850 kg/m³):

M = (3.1416 × 0.04² / 4) × 7,850 = 0.001257 × 7,850 = 9.865 kg/m

Total weight of a batch: M_total = M × L, where L is length in metres.

Table 2. Specific gravity of steel grades

Standards: EN 10060:2003 (hot-rolled round steel bars — tolerances on shape, dimensions and mass). Also compliant with GOST 2590-2006 / DSTU 4738:2007.

Steel grade	Steel type	Specific gravity, kg/m³
12X18N10T	Stainless structural cryogenic steel	7,900
08X18N10T	Stainless corrosion-resistant heat-resistant	7,900
09G2S / 09Г2С	Low-alloy structural steel	7,850
10, 20, 30, 40	Quality structural carbon steel	7,850
St3sp, St3ps / Ст3сп, Ст3пс	Structural carbon steel	7,870
X12MF / Х12МФ	Die tool steel	7,700
65G / 65Г	Spring structural steel	7,850
5XNM / 5ХНМ	Hot-work die tool steel	7,800
30XGSA / 30ХГСА	Alloyed structural steel	7,850
EI418 / ЭИ418	Nickel-chromium steel	8,510
X13N4G9 (EI100)	Chromium-manganese-nickel steel	8,500
1X13–4X14, X17–X18	Chromium steel	7,700–7,750
X25, X27, X28	High-chromium steel	7,550–7,850
0X18N9–2X18N9	Chromium-nickel steel	7,850
X17N2 (EI268)	Chromium-nickel steel	7,750
X23N18 (EI417)	Heat-resistant chromium-nickel steel	7,900
EI107 / ЭИ107	Chromium-silicon-molybdenum steel	7,620
EI69 / ЭИ69	Chromium-nickel-tungsten steel	8,000
X25N20S2 (EI283)	Cr-Ni-W-Si steel	8,000
70 (VS / BC / ВС)	High-carbon steel	7,850
45	Medium-carbon steel	7,850
10, 10A, 20, 20A	Mild (low-carbon) steel	7,850
A, E, EA, EAA	Mild electrical steel	7,800
15XA / 15ХА	Chromium steel	7,740
38XMYUA / 38ХМЮА	Cr-Al-Mo nitriding steel	7,650
25XGSA / 25ХГСА	Chromium-manganese-silicon steel	7,850
40XFA / 50XFA	Chromium-vanadium steel	7,740–7,800

Order steel round bar

The table helps you calculate the quantity required. The next step is to place an order:

Steel circles in mechanical engineering

Steel round bar weight table: mass per metre, cross-section, metres per tonne

Table 1. Steel round bar weight table

How to calculate the weight yourself

Table 2. Specific gravity of steel grades

Order steel round bar

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