Manufacturer, Supplier & Exporter of Automotive Round Bar

Automotive Round Bars supplied and manufactured by Riddhi Siddhi Impex are engineered to meet the highly demanding requirements of modern automobile manufacturing. These bars play an essential role in producing engine components, transmission systems, suspension parts, drive shafts, axles, fasteners, and precision-machined automotive assemblies. Manufactured using high-strength carbon steels, alloy steels, stainless steels, and micro-alloyed grades, the round bars are processed to ensure exceptional durability, fatigue resistance, and machinability suitable for high-performance automotive applications...

The automotive industry requires materials that can withstand continuous mechanical stress, intense friction, and varying load conditions. Riddhi Siddhi Impex produces Automotive Round Bars through controlled hot-rolled, cold-drawn, or precision-ground processes to maintain tight dimensional tolerance, straightness, and surface finish. These production practices ensure that the round bars consistently support OEM and Tier-1 manufacturers who rely on accuracy and repeatability for large-scale production.

Each Automotive Round Bar is manufactured following strict metallurgical standards and undergoes rigorous inspection to ensure quality and traceability. Material batches are tested for chemical composition, mechanical strength, tensile properties, impact resistance, and surface integrity. Advanced ultrasonic testing, eddy current testing, and spectrochemical analysis are frequently used to ensure that the bars meet customer specifications and automotive quality frameworks..

Riddhi Siddhi Impex offers a wide range of automotive bar grades, including EN8, EN19, EN24, EN31, 20MnCr5, 16MnCr5, 42CrMo4, 4140, 4340, Stainless 304, 316, 431, and many more. These materials are widely used across automotive machining units, forging industries, component manufacturers, and tool rooms. The versatility of grades allows customers to choose the right combination of strength, machinability, surface hardness, and heat-treatment compatibility for specific applications...

Automotive Round Bars are available in multiple diameters and lengths, ranging from small sizes for fasteners and precision-machined parts to large-diameter bars used for shafts, gears, and load-bearing automotive components. Riddhi Siddhi Impex also provides custom lengths, chamfering, peeling, grinding, polishing, and protective packaging services to help customers reduce wastage and streamline machining processes..

Automotive Round Bar – Technical Specifications

Specification

Parameter	Details
Product Name	Automotive Round Bar
Manufacturer & Supplier	Riddhi Siddhi Impex
Grades Available	EN8, EN19, EN24, EN31, 20MnCr5, 16MnCr5, 42CrMo4, 4140, 4340, SS 304/316/431
Manufacturing Process	Hot Rolled, Cold Drawn, Peeled, Turned, Ground & Polished
Surface Finish	Black, Bright, Ground, Peeled, Polished
Supply Length	1 Meter to 6 Meter (custom cuts available)
Applications	Automotive shafts, fasteners, gears, axles, suspension, engine components

Chemical Composition (Typical Grades)

Grade	C%	Mn%	Si%	Cr%	Mo%	Ni%
EN8	0.36–0.44	0.60–1.00	0.10–0.40	—	—	—
EN19 / 4140	0.36–0.44	0.60–1.00	0.10–0.40	0.90–1.20	0.15–0.25	—
EN24	0.36–0.44	0.40–0.70	0.10–0.35	1.00–1.40	0.20–0.35	1.30–1.80
20MnCr5	0.17–0.22	1.10–1.40	0.10–0.40	0.80–1.10	—	—

Mechanical Properties

Property	EN8	EN19	EN24	20MnCr5
Tensile Strength (MPa)	550–650	700–900	850–1000	600–850
Yield Strength (MPa)	300–350	450–650	600–750	350–550
Hardness (HB)	160–220	200–260	250–300	170–240
Elongation (%)	13–17%	10–14%	8–12%	12–18%

Dimension Chart (Automotive Round Bar)

Diameter (mm)	Tolerance	Condition
6 – 20 mm	±0.05 mm	Cold Drawn / Ground
20 – 50 mm	±0.10 mm	Hot Rolled / Peeled
50 – 150 mm	±0.20 mm	Hot Rolled / Forged
150 – 350 mm	±0.50 mm	Forged / Machined

Equivalent Grades

India (EN)	SAE / AISI	DIN / EN
EN8	1040 / 1045	C45
EN19	4140	42CrMo4
EN24	4340	34CrNiMo6
20MnCr5	—	1.7147

Equivalent Standards

Material	Standard
Carbon Steel Bars	ASTM A29 / IS 1570
Alloy Steel Bars	ASTM A322 / IS 5517
Stainless Steel Bars	ASTM A276 / A479
Case Hardening Steels	DIN 17210 / EN 10084

Other Types of Automotive Bars Supplied

• Carbon Steel Automotive Round Bar
• Alloy Steel Automotive Round Bar
• Stainless Steel Automotive Round Bar
• Bright Bar (Drawn / Ground)
• Case Hardening Round Bar
• Induction-Hardened Round Bar
• Machined Shaft Bars

One of the biggest advantages of partnering with Riddhi Siddhi Impex is their strong domestic distribution network. As an Automotive Round Bar Domastic supplier, the company supplies round bars to major automotive and engineering hubs across India. These include Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, Mangalore, Nashik, Kolhapur, Chandrapur, Akola, Vilayat, Somnath, Dahej, Narmada, Ankleshwar, Navsari, Valsad, Rajpipla and other industrial regions..

Frequently Asked Questions (FAQs)

Q1: Do you provide custom cut lengths?

Yes, Riddhi Siddhi Impex supplies Automotive Round Bars in custom lengths to reduce machining wastage.

Q2: What testing is provided with the material?

We provide MTC (EN 10204 3.1), ultrasonic testing, hardness testing, chemical analysis & mechanical reports.

Q3: Which cities do you supply Automotive Round Bars to?

We supply across India including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Lucknow, Kochi, Coimbatore, Mysuru, Nashik, Dahej, Navsari, Valsad, Rajpipla and more.

Q4: What are common uses of Automotive Round Bars?

They are used for shafts, gears, axles, fasteners, crankshafts, connecting rods, and other automotive machined components.