What is steel round bar? Latest weight, mass volume and specifications table

Long before, intermediate steel types had the drawback of being excessively hard, making them prone to breaking. However, with the advent of steel round bar, this weakness was improved, gradually becoming an excellent choice for the construction and machinery industries. To better understand steel round bar, please refer to some highly useful information in the article below.

What is steel round bar?

Steel round bar is a type of material whose main composition is an alloy with a carbon content of about (0.42-0.50). This is a material with excellent corrosion and oxidation resistance, strong impact resistance, and high elasticity. Thanks to these advantages, it is widely applied in mechanical industries, mold manufacturing, gears, machine parts, bolts, and more.

This type of steel round bar is imported to Vietnam from other countries such as Japan, Taiwan, China, India, South Korea, the EU, Malaysia, various European countries, and more.

Classification of steel round bar

Currently, the market offers a wide range of different types of round bar steel to cater to various needs. Essentially, steel round bar is categorized based on two main criteria: size and steel grade.

Classification of steel round bar by size: This includes various sizes from Ø10 to Ø610 with lengths of 6m, 9m, and 12m, respectively.

Classification of steel round bar by steel grade: S45C, S50C, S35C, S30C, S20C, SCM420, SCM440, SCR420, and more.

Common applications of steel round bar today

Due to its exceptional characteristics, steel round bar is highly favored for use in industries with purposes such as:

• Creating molds for embossing, plastic molding, and more.
• Machining mechanical components that require strength and high precision.
• Producing dies for shaping, saw blades, rolled shafts, and other wear-resistant components.
• Manufacturing bolts for telecommunications transmission and receiving stations.
• steel round bar is also widely used in the automotive engine manufacturing industry and motorcycle spare parts. Notable examples of components requiring load-bearing capacity include bolts, shafts, screws, and more.

Table of chemical composition and physical-mechanical properties of steel round bar

Chemical composition of steel round bar:

Steel code	Chemical composition (%)
	C	Si	Mn	Ni	Cr	P	S
SS400	−	−	−	−	−	≤ 0.05	≤ 0.05
S15C	0.13 ~ 0.18	−	0.95 ~ 1.15	−	0.20	0.030 max	0.035 max
S20C	0.18 ~ 0.23	0.15 ~ 0.35	0.30 ~ 0.60	0.20	0.20	0.030 max	0.035 max
S35C	0.32 ~ 0.38	0.15 ~ 0.35	0.30 ~ 0.60	0.20	0.20	0.030 max	0.035 max
S45C	0.42 ~ 0.48	0.15 ~ 0.35	0.6 ~ 0.9	0.20	0.20	0.030 max	0.035 max
S55C	0.52 ~ 0.58	0.15 ~ 0.35	0.6 ~ 0.9	0.20	0.20	0.030 max	0.035 max

Physical-mechanical properties of steel round bar:

Steel code	Tensile strength	Yield strength	Relative elongation
	N/mm²	N/mm²	(%)
SS400	310	210	33.0
S15C	355	228	30.5
S20C	400	245	28.0
S35C	510 ~ 570	305 ~ 390	22.0
S45C	570 ~ 690	345 ~ 490	17.0
S55C	630 ~ 758	376 ~ 560	13.5

Manufacturing process of steel round bar

Step 1: Iron Ore Processing

Step 2: Creating Molten Steel

Step 3: Continuous Casting

Step 4: Hot Rolling and Cold Rolling

Step 5: Completion of Finished Steel Round Bar

Advantages and disadvantages of steel round bar

Advantages: 

• Diverse designs and various sizes available to meet current needs
• Easy to work with and transport.
• Flexible and bendable.
• Can be cut, chopped, folded to desired sizes.
• Smooth, round, and sleek steel surface, providing high aesthetics.

Disadvantages: 

• Electroplated steel round bar only has a thin layer of electroplating on the outside surface, resulting in low durability.
• Galvanized steel round bar has a relatively high selling price.
• Susceptible to shape changes under high temperatures.
• Lengthy processing time.

Specifications and weight calculation for steel round bar

To calculate the weight of steel round bar, here is a reference table of specifications and detailed calculation methods:

What are the specifications of steel round bar?

The application of steel round bar in construction, mechanical processing, and more is continuously growing. However, many users still struggle to understand the specifications of round bar steel, which can lead to difficulties in choosing the right type of steel for their projects.

In reality, the specifications of a type of steel with a circular cross-sectional shape and solid core are not as complex as many people think. Simply put, it is a specialized term that refers to various parameters such as thickness and weight of steel corresponding to different diameter values.

Why do you need to understand the specifications of steel round bar?

Some people might wonder whether it’s really necessary to understand the specifications of steel round bar. In reality, it is highly essential. Understanding the specifications of steel round bar brings several valuable benefits, including:

Helping customers quickly choose the right size of steel that fits their usage needs.

Clear understanding of the specifications of steel round bar enables you to select the correct material source to enhance efficiency, ensure durability, and maximize the lifespan of your projects.

Most importantly, you can save significant costs by understanding the specifications of steel round bar.

Reference table of specifications for common types of steel round bar

Here are the details of the reference table for the specifications of some popular types of steel round bar available in the current market. This lookup table will make it easier for you to compare and reference as follows:

STT	SPECIFICATIONS	WEIGHT	STT	SPECIFICATIONS	WEIGHT
	mm	kg/m		mm	kg/m
1	Steel round bar D6	0.22	37	Steel round bar D155	148.12
2	Steel round bar D8	0.39	38	Steel round bar D160	157.83
3	Steel round bar D10	0.62	39	Steel round bar D170	178.18
4	Steel round bar D12	0.89	40	Steel round bar D180	199.76
5	Steel round bar D14	1.21	41	Steel round bar D190	222.57
6	Steel round bar D16	1.58	42	Steel round bar D200	246.62
7	Steel round bar D18	2.00	43	Steel round bar D210	271.89
8	Steel round bar D20	2.47	44	Steel round bar D220	298.40
9	Steel round bar D22	2.98	45	Steel round bar D230	326.15
10	Steel round bar D24	3.55	46	Steel round bar D240	355.13
11	Steel round bar D25	4.17	47	Steel round bar D250	385.34
12	Steel round bar D26	4.83	48	Steel round bar D260	416.78
13	Steel round bar D28	5.55	49	Steel round bar D270	449.46
14	Steel round bar D30	6.31	50	Steel round bar D280	483.37
15	Steel round bar D32	7.13	51	Steel round bar D290	518.51
16	Steel round bar D34	7.55	52	Steel round bar D300	554.89
17	Steel round bar D35	7.99	53	Steel round bar D310	592.49
18	Steel round bar D36	8.90	54	Steel round bar D320	631.34
19	Steel round bar D38	9.86	55	Steel round bar D330	671.41
20	Steel round bar D40	10.88	56	Steel round bar D340	712.72
21	Steel round bar D42	11.94	57	Steel round bar D350	755.26
22	Steel round bar D44	12.48	58	Steel round barD360	799.03
23	Steel round bar D45	13.05	59	Steel round bar D370	844.04
24	Steel round bar D46	14.21	60	Steel round bar D380	890.28
25	Steel round bar D48	15.41	61	Steel round bar D390	937.76
26	Steel round bar D50	16.67	62	Steel round bar D400	986.46
27	Steel round bar D52	18.65	63	Steel round bar D410	1.036.40
28	Steel round bar D55	22.20	64	Steel round bar D420	1.087.57
29	Steel round bar D60	26.05	65	Steel round bar D420	1.139.968
30	Steel round bar D65	30.21	66	Steel round bar D430	1.248.49
31	Steel round bar D70	34.68	67	Steel round bar D450	1.276.39
32	Steel round bar D75	39.46	68	Steel round bar D455	1.420.51
33	Steel round bar D80	44.54	69	Steel round bar D480	1.541.35
34	Steel round bar D85	49.94	70	Steel round bar D500	1.667.12
35	Steel round bar D90	55.64	71	Steel round bar D520	1.865.03
36	Steel round bar D95	–	72	Steel round bar D550	2.074.04

Some Formulas for Calculating the Weight of Solid Round Steel

To calculate the weight of solid round steel, here are some methods that can be applied:

Method 1: Weight = 0.0007854 x OD x OD x 7.85

Where:
OD (Out Diameter): Outer diameter (unit: mm)

Method 2: Weight = R2 / 40.5

Where:
OD (Out Diameter): Outer diameter (unit: mm)
R (radius): Radius (R = OD/2) (unit: mm)

Method 3: Weight = R2 x 0.02466

Where:
OD (Out Diameter): Outer diameter (unit: mm)
R (radius): Radius (R = OD/2) (unit: mm)

Method 4: Weight = OD2 x 0.00617

Where:
OD (Out Diameter): Outer diameter (unit: mm)

Method 5: Weight = OD2/ 162

Where:
OD (Out Diameter): Outer diameter (unit: mm)

Table of weight for steel round bar

No	Specification	Weight (kg/meter)	Specification	No	Specification	Weight (kg/meter)
1	Steel round bar Ø6	0.22	Steel round bar	46	Steel round bar Ø155	148.12
2	Steel round bar Ø8	0.39	Steel round bar	47	Steel round bar Ø160	157.83
3	Steel round bar Ø10	0.62	Steel round bar	48	Steel round bar Ø170	178.18
4	Steel round bar Ø12	0.89	Steel round bar	49	Steel round bar Ø180	199.76
5	Steel round bar Ø14	1.21	Steel round bar	50	Steel round bar Ø190	222.57
6	Steel round bar Ø16	1.58	Steel round bar	51	Steel round bar Ø200	246.62
7	Steel round bar Ø18	2.00	Steel round bar	52	Steel round bar Ø210	271.89
8	Steel round bar Ø20	2.47	Steel round bar	53	Steel round bar Ø220	298.40
9	Steel round bar Ø22	2.98	Steel round bar	54	Steel round bar Ø230	326.15
10	Steel round bar Ø24	3.55	Steel round bar	55	Steel round bar Ø240	355.13
11	Steel round bar Ø25	3.85	Steel round bar	56	Steel round bar Ø250	385.34
12	Steel round bar Ø26	4.17	Steel round bar	57	Steel round bar Ø260	416.78
13	Steel round bar Ø28	4.83	Steel round bar	58	Steel round bar Ø270	449.46
14	Steel round bar Ø30	5.55	Steel round bar	59	Steel round bar Ø280	483.37
15	Steel round bar Ø32	6.31	Steel round bar	60	Steel round bar Ø290	518.51
16	Steel round bar Ø34	7.13	Steel round bar	61	Steel round bar Ø300	554.89
17	Steel round bar Ø35	7.55	Steel round bar	62	Steel round bar Ø310	592.49
18	Steel round bar Ø36	7.99	Steel round bar	63	Steel round bar Ø320	631.34
19	Steel round bar Ø38	8.90	Steel round bar	64	Steel round bar Ø330	671.41
20	Steel round bar Ø40	9.86	Steel round bar	65	Steel round bar Ø340	712.72
21	Steel round bar Ø42	10.88	Steel round bar	66	Steel round bar Ø350	755.26
22	Steel round bar Ø44	11.94	Steel round bar	67	Steel round bar Ø360	799.03
23	Steel round bar Ø45	12.48	Steel round bar	68	Steel round bar Ø370	844.04
24	Steel round bar Ø46	13.05	Steel round bar	69	Steel round bar Ø380	890.28
25	Steel round bar Ø48	14.21	Steel round bar	70	Steel round bar Ø390	937.76
26	Steel round bar Ø50	15.41	Steel round bar	71	Steel round bar Ø400	986.46
27	Steel round bar Ø52	16.67	Steel round bar	72	Steel round bar Ø410	1,036.40
28	Steel round bar Ø55	18.65	Steel round bar	73	Steel round bar Ø420	1,087.57
29	Steel round bar Ø60	22.20	Steel round bar	74	Steel round bar Ø430	1,139.98
30	Steel round bar Ø65	26.05	Steel round bar	75	Steel round bar Ø450	1,248.49
31	Steel round bar Ø70	30.21	Steel round bar	76	Steel round bar Ø455	1,276.39
32	Steel round bar Ø75	34.68	Steel round bar	77	Steel round bar Ø480	1,420.51
33	Steel round bar Ø80	39.46	Steel round bar	78	Steel round bar Ø500	1,541.35
34	Steel round bar Ø85	44.54	Steel round bar	79	Steel round bar Ø520	1,667.12
35	Steel round bar Ø90	49.94	Steel round bar	80	Steel round bar Ø550	1,865.03
36	Steel round bar Ø95	55.64	Steel round bar	81	Steel round bar Ø580	2,074.04
37	Steel round bar Ø100	61.65	Steel round bar	82	Steel round bar Ø600	2,219.54
38	Steel round bar Ø110	74.60	Steel round bar	83	Steel round bar Ø635	2,486.04
39	Steel round bar Ø120	88.78	Steel round bar	84	Steel round bar Ø645	2,564.96
40	Steel round bar Ø125	96.33	Steel round bar	85	Steel round bar Ø680	2,850.88
41	Steel round bar Ø130	104.20	Steel round bar	86	Steel round bar Ø700	3,021.04
42	Steel round bar Ø135	112.36	Steel round bar	87	Steel round bar Ø750	3,468.03
43	Steel round bar Ø140	120.84	Steel round bar	88	Steel round bar Ø800	3,945.85
44	Steel round bar Ø145	129.63	Steel round bar	89	Steel round bar Ø900	4,993.97
45	Steel round bar Ø150	138.72	Steel round bar	90	Steel round bar Ø1000	6,165.39

Latest steel round bar quotation

The price of steel round bar will experience fluctuations depending on supply and demand levels. When the supply is insufficient, it’s evident that steel prices will rise. Conversely, if customer demand decreases and steel production exceeds consumption, prices will inevitably decrease.

Because of this, the price of steel round bar will vary during specific periods. Furthermore, the factor that can cause price fluctuations is the quantity of orders, whether they are numerous or limited.

Here is a compilation of the price list for steel round bar to provide everyone with a reference and understanding. Please pay attention that the table below will include the price range for plain round steel and unit prices. As previously mentioned, the price of this product will always change with each purchasing time, so customers are kindly advised to directly contact the hotline: (+84)2471001868/ (+84)975271499 to receive the current prices when making a purchase. Here is the detailed steel price list.

Below is the indicative price table:

Product name	Barem (kg/m )	Price VND/kg	Price per 6m
Steel round bar Ø6	0.22	16,500	21,780
Steel round bar Ø8	0.39	16,500	38,610
Steel round bar Ø10	0.62	16,500	61,380
Steel round bar Ø12	0.89	16,500	88,110
Steel round bar Ø14	1.21	16,500	119,790
Steel round bar Ø16	1.58	16,500	156,420
Steel round bar Ø18	2.00	16,500	198,000
Steel round bar Ø20	2.47	16,500	244,530
Steel round bar Ø22	2.98	16,500	295,020
Steel round bar Ø24	3.55	16,500	351,450
Steel round bar Ø25	3.85	16,500	381,150
Steel round bar Ø26	4.17	16,500	412,830
Steel round bar Ø28	4.83	16,500	478,170
Steel round bar Ø30	5.55	16,500	549,450
Steel round bar Ø32	6.31	16,500	624,690
Steel round bar Ø34	7.13	16,500	705,870
Steel round bar Ø35	7.55	16,500	747,450
Steel round bar Ø36	7.99	16,500	791,010
Steel round bar Ø38	8.9	16,500	881,100
Steel round bar Ø40	9.86	16,500	976,140
Steel round bar Ø42	10.88	16,500	1,077,120
Steel round bar Ø44	11.94	16,500	1,182,060
Steel round bar Ø45	12.48	16,500	1,235,520
Steel round bar Ø46	13.05	16,500	1,291,950
Steel round bar Ø48	14.21	16,500	1,406,790
Steel round bar Ø50	15.41	16,500	1,525,590
Steel round bar Ø52	16.67	16,500	1,650,330
Steel round bar Ø55	18.65	16,500	1,846,350
Steel round bar Ø60	22.2	16,500	2,197,800
Steel round bar Ø65	26.05	16,500	2,578,950
Steel round bar Ø70	30.21	16,500	2,990,790
Steel round bar Ø75	34.68	16,500	3,433,320
Steel round bar Ø80	39.46	16,500	3,906,540
Steel round bar Ø85	44.54	16,500	4,409,460
Steel round bar Ø90	49.94	16,500	4,944,060
Steel round bar Ø95	55.64	16,500	5,508,360
Steel round bar Ø100	61.65	16,500	6,103,350
Steel round bar Ø110	74.6	16,500	7,385,400
Steel round bar Ø120	88.78	16,500	8,789,220
Steel round bar Ø125	96.33	16,500	9,536,670
Steel round bar Ø130	104.2	16,500	10,315,800
Steel round bar Ø135	112.36	16,500	11,123,640
Steel round bar Ø140	120.84	16,500	11,963,160
Steel round bar Ø145	129.63	16,500	12,833,370
Steel round bar Ø150	138.72	16,500	13,733,280
Steel round bar Ø155	148.12	16,500	14,663,880
Steel round bar Ø160	157.83	16,500	15,625,170
Steel round bar Ø170	178.18	16,500	17,639,820
Steel round bar Ø180	199.76	16,500	19,776,240
Steel round bar Ø190	222.57	16,500	22,034,430
Steel round bar Ø200	246.62	16,500	24,415,380
Steel round bar Ø210	271.89	16,500	26,917,110
Steel round bar Ø220	298.4	16,500	29,541,600
Steel round bar Ø230	326.15	16,500	32,288,850
Steel round bar Ø240	355.13	16,500	35,157,870
Steel round bar Ø250	385.34	16,500	38,148,660
Steel round bar Ø260	416.78	16,500	41,261,220
Steel round bar Ø270	449.46	16,500	44,496,540
Steel round bar Ø280	483.37	16,500	47,853,630
Steel round bar Ø290	518.51	16,500	51,332,490
Steel round bar Ø300	554.89	16,500	54,934,110
Steel round bar Ø310	592.49	16,500	58,656,510
Steel round bar Ø320	631.34	16,500	62,502,660
Steel round bar Ø330	671.41	16,500	66,469,590
Steel round bar Ø340	712.72	16,500	70,559,280
Steel round bar Ø350	755.26	16,500	74,770,740
Steel round bar Ø360	799.03	16,500	79,103,970
Steel round bar Ø370	844.04	16,500	83,559,960
Steel round bar Ø380	890.28	16,500	88,137,720
Steel round bar Ø390	937.76	16,500	92,838,240
Steel round bar Ø400	986.46	16,500	97,659,540
Steel round bar Ø410	1,036.40	16,500	102,603,600
Steel round bar Ø420	1,087.57	16,500	107,669,430
Steel round bar Ø430	1,139.98	16,500	112,858,020
Steel round bar Ø450	1,248.49	16,500	123,600,510
Steel round bar Ø455	1,276.39	16,500	126,362,610
Steel round bar Ø480	1,420.51	16,500	140,630,490
Steel round bar Ø500	1,541.35	16,500	152,593,650
Steel round bar Ø520	1,667.12	16,500	165,044,880
Steel round bar Ø550	1,865.03	16,500	184,637,970
Steel round bar Ø580	2,074.04	16,500	205,329,960
Steel round bar Ø600	2,219.54	16,500	219,734,460
Steel round bar Ø635	2,486.04	16,500	246,117,960
Steel round bar Ø645	2,564.96	16,500	253,931,040
Steel round bar Ø680	2,850.88	16,500	282,237,120
Steel round bar Ø700	3,021.04	16,500	299,082,960
Steel round bar Ø750	3,468.03	16,500	343,334,970
Steel round bar Ø800	3,945.85	16,500	390,639,150
Steel round bar Ø900	4,993.97	16,500	494,403,030
Steel round bar Ø1000	6,165.39	16,500	610,373,610

Notes:

• The prices listed above are for reference only.
• The quoted prices include a 10% VAT. Transportation costs are subject to agreement.
• Product Standard: 100% new and unused, sourced directly from the manufacturing plant.
• Allowable weight and thickness tolerances for pipes, sheets, hollow sections, and beams are approximately ± 5-7%, while for structural steel sections, it’s around ± 10-13% in accordance with factory standards. If there are any product discrepancies from the company’s side, customers are entitled to returns, exchanges, or discounts. Returned items must be in their original condition (unaltered, unpainted, rust-free).
• Deposit payment method: To be determined through mutual agreement.
• Inspection of goods should take place at the construction site or the delivery location. Full payment should only be made upon receipt of the complete order.
• The quoted prices are valid until new notification is received.

Reliable, high-quality steel round bar suppliers on the market

Currently, there are numerous steel suppliers in the domestic market, which can make buyers unsure about where to find a reputable supplier.

Stavian Industrial Metal is proud to be a leading steel supply system, consistently highly regarded for its reliability. We always approach cooperation with sincerity and respect, aiming to mutually contribute to substantial growth. As a prominent entity, our operations are guided by:

• Utmost honesty in advising customers on product quality, origin, and suitable pricing.
• Promptly addressing customer inquiries, finalizing orders, and ensuring timely deliveries that provide attentive service wherever and whenever needed.
• Building lifelong trust by satisfying customers through product quality and the service standards that Stavian provides.

Hence, if you’re seeking steel round bar, don’t hesitate to directly contact Stavian Industrial Metal Corporation for the most detailed consultation.

For all inquiries, please contact: