Grade Introduction 

C40 Bright Bar is commonly used in the steel industry.  In addition to automobile deals, C40 bright bars is suitable for use in a wider range of planning applications. Heat has little effect on C40’s wear resistance.

Round Bright bars made from C40 are made from pure medium carbon steel. C40 bars are used when low-carbon steel is not an option because of its superior properties. C40 magnificent bar goes through heat treatment to deliver a fair surface hardness and a little wear check by fire.

The pure medium steel grade C40 has a respectable level of strength. It is typically regulated when it is in a cold-drawn or as-moved state. Although they are erratic, flexible properties typically range from 500 to 800 N/mm2.

However, C40 is frequently utilized in situations where low-carbon steel is not sufficient to meet the requirements. The high cost of mixed steel is not justified by it. C40 bright bars have a respectable surface hardness and reasonable wear resistance and is frequently cemented by fire or enrollment. C40 is available for use and can be moved from the bar’s stockpile. Bright bars that are of different size ranges are available at Dhand Steels.

Grade Application 

C40 carbon steel is a well-known medium carbon steel that is also medium pliable. It has a thorough-solidifying medium carbon content and superior strength to mild steel. In addition, C40 carbon steel can be machined effectively in any setting.

The preparation method of C40 is typically utilized in their supplied, untreated form. However, enlistment methods may also surface-solidify C40 preparations, resulting in components that are more resistant to wear. Steel C40 materials have excellent uniform metallurgical designs in their intensity-treated structures, providing dependable machining qualities.

Chemical properties of C40 Bright Bar 

Because it can be machined quickly and easily for any purpose, the C40 grade of bright bars through-solidifying medium carbon steel is quite popular. The bright bars can be used to make gears, bolts, studs, axles, and shafts that are generally usable. Utilizing acceptance techniques, it is frequently possible to further surface-solidify it to 50–55 HRC, providing components with more advanced wear obstruction. C40D is recommended for these applications. C40 M, a free-machining variant, is also available at Dhand Steels. 

Grade	Chemical composition %:
	C	Si	Mn	S	P	Cr	Ni	Cu
C40	0.17-0.24	0.17-0.37	0.7-1.00	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25

Mechanical properties

High yield strength, tensile strength, and hardness are all mechanical properties of C40 bright bars. Mechanical properties can be altered by treating the material with heat. C40 has a tensile strength of 500 to 1200 MPa. The C40 yield strength ranges between 400 and 630 MPa. Density is high in C40. Depending on the type of heat treatment, the material’s mechanical properties may change. Strength tests, impact tests, Brinell hardness tests, fracture toughness tests, and durability tests are all performed on C40. 

The following is a list of C40’s physical characteristics:

Grade	Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation in 100-150 mm(%)	Reduction in Area	Hardness
C40	≥380	≥210	≥25	≥50	≤111HB

Physical properties

C40 carbon steel bright bar is a popular medium carbon and medium tensile steel that through-hardens and has greater strength than mild steel. C40 Carbon Steel Round Bar can also be easily machined in any situation. Most of the time, C40 steels are used in their raw, untreated state.

Sl. No.	Condition	Size (Diameter Across Flats Or Thickness)	Tensile Strength N/Mm2 ( Min.)	Yield stress N/Mm2 ( Min.)	At Gauge Length, percentage elongation is 5.65 √S0
1	Normalized + Turned Or Ground	6 To 150	550	280	16
		> 150 To 250	510	245	17
2	Hot Rolled + Cold Drawn Or Hot Rolled + Cold Drawn + Ground	6 To 13	660	530	7
		> 13 To 16	658	510	8
		> 16 To 40	620	480	10
		> 40 To 63	600	467	10
		> 63 To 76	578	430	10
3	Hardened And Tempered + Turned Or Ground	Q  6 To 63	625 To 775	385	16
		R  6 To 19	700 To 850	465	16
4	Hardened And Tempered + Cold Drawn Or Hardened And Tempered + Cold Drawn + Ground	Q  6 To 63	687 To 965	437	12
		R  6 To 19	757 To 850	490	12

Bright Bar Hardness

C40 Round Bar and Pole has more strength and hardness than low-carbon grades. EN 8/8D is, in fact, formable and weldable with standard shop methods. The C40 grade does well with shaping and intensity treatment despite having excellent machinability. Rounds:300 mm to 23.5 mm; Bars that Shine: 63.5 mm to 18 mm; Pads: 50 to 150 mm by 25 mm; Squares: 22 to 75 microns; Hexagons: 38 mm to 23.5 mm; are a portion of the standard C40 bar sizes.

Brinell hardness ranges from 205-255.

Heat treatment

C40 or 080m40 can be processed at temperatures between 550 and 660 degrees Celsius (1022 and 1220 degrees Fahrenheit), warming for about an hour for each additional layer of thickness, and then cooling in oil or water.

Before being air-cooled, C40 brilliant mild steel is standardized at temperatures of 830–860 °C (1526–1580 °F).

After being warmed to this temperature, steel will burn more diligently if ignited in water or oil.

Hardening of the Bright Bar: Surface hardness and wear resistance of C40 are moderate after induction or flame hardening.

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Tensile strength

The C40 Bright Bar has a high tensile strength and is made of unalloyed, medium-carbon steel. High stiffness, unalloyed, medium-carbon steel grade C40 is typically offered in rolled or cold-drawn form. Albeit bendable attributes can change, they commonly fall somewhere in the range of 500 and 800 N/mm2.

Yield strength

The C40 Bright Bar yield strength (106 Pa) for the cold-drawn thin condition is 530, whereas the normalized state yield strength is 280.

Shapes 

At Dhand Steels, we manufacture C40 Bright bar in round, Hexagons, Squares, and Flats shape.

Sizes

The size ranges from 2mm to 200 mm. 

 

Our organization is an ISO 9001:2015 ensured brilliant bar producer, exhibiting the unrivaled nature of the relative multitude of stocks it produces. To ensure that its items are protected with utilization, the organization likewise complies with extra security guidelines including HACCP.