EN19 Round Bar Supplier Mumbai for High-Strength Shafts and Engineering Components
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Meta Description: EN19 Round Bar Supplier Mumbai supplying EN19 709M40 alloy steel round bars for shafts, gears, axles, machine parts, automotive components and heavy engineering.
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Table of Contents
- What Is EN19 Round Bar?
- EN19 709M40 Steel Grade
- EN19 Chemical Composition
- EN19 Round Bar Mechanical Properties
- Why EN19 Is Used for High-Strength Components
- EN19 Round Bar Applications
- EN19 Heat Treatment
- EN19 Machining and Welding
- EN19 Round Bar Sizes and Finishes
- EN19 Round Bar Price Factors
- How to Buy EN19 Round Bar
- EN19 Round Bar Supplier in Mumbai
- Frequently Asked Questions
- Request a Quote
What Is EN19 Round Bar?
EN19 Round Bar is a chromium-molybdenum alloy steel used for engineering components that require higher strength, toughness and hardenability than ordinary carbon steels.
EN19 is commonly associated with the historical designation 709M40. It is widely recognized in the engineering market as a high-strength alloy steel used for demanding components such as shafts, gears, axles and studs.
The grade is also frequently cross-referenced commercially with AISI 4140 / SAE 4140, although the exact chemical and specification requirements should always be checked before treating the grades as interchangeable.
For industrial buyers, a clear purchase description can be written as:
EN19 / 709M40 Alloy Steel Round Bar
The combination of chromium and molybdenum contributes to the alloy’s hardenability and mechanical performance.
EN19 709M40 Steel Grade
EN19 belongs to the alloy-steel category rather than the plain carbon-steel category.
The historical BS designation 709M40 is commonly used alongside EN19 in the steel market. Because historical BS specifications have been withdrawn and replaced by newer standards, the applicable specification should be confirmed from the engineering drawing, customer requirement or purchase order.
For procurement, specify:
Material: EN19
Designation: 709M40
Product: Round Bar
Diameter: Required size
Length: Required length
Condition: As specified
Heat Treatment: As required
Finish: As required
Quantity: Required quantity
This is particularly important when EN19 is being sourced for an OEM or export requirement.
EN19 Chemical Composition
EN19 is a chromium-molybdenum alloy steel. Its chemistry gives the material its characteristic balance of strength, hardenability and toughness after suitable processing.
Commonly published EN19 / 709M40 composition is approximately:
| Element | Typical Range |
|---|---|
| Carbon (C) | 0.35–0.45% |
| Silicon (Si) | 0.10–0.35% |
| Manganese (Mn) | 0.50–0.90% |
| Chromium (Cr) | 0.90–1.50% |
| Molybdenum (Mo) | 0.20–0.40% |
| Sulphur (S) | Controlled to specification |
| Phosphorus (P) | Controlled to specification |
| Iron (Fe) | Balance |
The exact limits depend on the applicable material specification and product form.
Chromium contributes to hardenability, while molybdenum is important in maintaining hardenability and mechanical performance during heat treatment.
For a commercial purchase, the Mill Test Certificate (MTC) should be used to verify the actual chemistry of the supplied heat.
EN19 Round Bar Mechanical Properties
EN19 is frequently selected because it can achieve high strength and toughness when supplied in an appropriate heat-treated condition.
Its final mechanical properties depend strongly on:
- Diameter
- Heat-treatment cycle
- Quenching medium
- Tempering temperature
- Delivery condition
- Section size
Published 709M40 references show that the alloy’s tensile and yield strength can vary substantially with heat-treatment condition. This means an EN19 Round Bar should not be specified only by a generic tensile-strength number.
For industrial procurement, the important mechanical characteristics include:
| Property | Importance |
|---|---|
| Tensile Strength | Resistance to tensile loading |
| Yield Strength | Resistance to permanent deformation |
| Toughness | Ability to absorb impact and resist fracture |
| Hardness | Wear and surface-performance considerations |
| Hardenability | Ability to develop hardness through section thickness |
| Fatigue Performance | Important for cyclically loaded components |
For critical components, use the certified properties applicable to the actual diameter and heat-treatment condition.
Why EN19 Is Used for High-Strength Components
A major advantage of EN19 is its response to heat treatment.
Unlike ordinary mild steel, EN19 can be processed to achieve a much higher strength level while retaining useful toughness.
The chromium-molybdenum alloying system also makes EN19 suitable for components where strength must be maintained through a significant section.
This is why the material appears frequently in industries manufacturing:
- Power-transmission components
- Automotive components
- Heavy machinery
- Oil and gas equipment
- General engineering components
- Forged and machined parts
For engineers, the key point is that EN19 is generally selected because the complete combination of strength, toughness and hardenability is useful—not simply because it has a high hardness value.
EN19 Round Bar Applications
Shafts
EN19 Round Bar is widely used for shafts exposed to significant torsional or bending loads.
Its strength after suitable heat treatment makes it appropriate for many power-transmission applications.
Gears
EN19 can be used for gears and gear-related components where high strength and toughness are required.
The final heat treatment and surface condition should be selected based on the gear design and service requirements.
Axles
The grade is suitable for selected axles and load-bearing rotating components.
Studs and High-Strength Fasteners
EN19 can be used in selected high-strength studs, bolts and similar components where the required mechanical properties can be achieved through appropriate processing.
Crankshafts
High-strength alloy steel grades such as EN19 are used for selected crankshaft and power-transmission applications.
Connecting Rods
The material is also relevant to selected automotive and machinery connecting components.
Heavy Engineering Components
Manufacturers may use EN19 for components subjected to high mechanical loads, repeated stress and wear.
EN19 Heat Treatment
Heat treatment is one of the most important factors when specifying EN19 Round Bar.
Annealing
Annealing can be used to soften the material, improve machinability and establish a suitable starting microstructure for subsequent processing.
Normalizing
Normalizing can refine the structure and provide a useful balance of strength and toughness.
Hardening
EN19 can be hardened by heating to the appropriate austenitizing range followed by controlled quenching.
The resulting hardness depends on section size and the actual heat-treatment procedure.
Tempering
Tempering after hardening is generally used to reduce brittleness and establish the required combination of strength and toughness.
Induction Hardening
For selected components, surface hardening can be used to produce a harder wear-resistant surface while retaining a tougher core.
The appropriate heat-treatment schedule must be established for the exact bar diameter and required final properties.
For critical applications, the purchaser should specify the required hardness, tensile strength, yield strength or other acceptance criteria rather than simply requesting “heat-treated EN19.”
EN19 Machining and Welding
EN19 can be machined in suitable delivery conditions.
Typical machining operations include:
- Turning
- Milling
- Drilling
- Boring
- Threading
- Grinding
Machinability changes with hardness and heat-treatment condition.
Annealed or normalized EN19 is generally easier to machine than hardened material. Therefore, manufacturing routes often involve machining at a suitable condition followed by heat treatment and final grinding or finishing where required.
Welding EN19
Welding EN19 requires more control than welding low-carbon steels.
Because the material contains significant carbon and alloying elements that increase hardenability, unsuitable welding conditions can lead to a hardened heat-affected zone and cracking risk.
For welded fabrication, the welding procedure should account for factors such as:
- Preheat
- Interpass temperature
- Heat input
- Filler-metal selection
- Cooling rate
- Post-weld heat treatment where required
The exact welding procedure should be established by the responsible welding engineer for the component and service conditions.
EN19 Round Bar Sizes and Finishes
EN19 Round Bar can be supplied in a range of diameters and surface conditions depending on the application.
Common commercial forms include:
Hot Rolled / Black Round Bar
Suitable when machining allowance is acceptable.
Bright Round Bar
Useful when improved surface finish and dimensional control are required.
Turned or Peeled Bar
Used where improved dimensional accuracy is required before final machining.
Ground Round Bar
Suitable for precision applications requiring tighter dimensional and surface control.
Forged Round Bar
Used for certain large-section and heavy engineering requirements.
When ordering, specify the diameter, tolerance, length and finish.
Manan Steel & Metals’ published round-bar range covers different engineering materials and supply forms, including hot-rolled, bright, forged, peeled, turned and centre-ground options. (Manan Steel & Metals)
EN19 Round Bar Price Factors
The EN19 Round Bar price depends on several factors.
Diameter
Larger bars require greater steel weight and can involve different processing requirements.
Length
Standard lengths and cut-to-length requirements can have different commercial costs.
Heat Treatment
Normalized, annealed or hardened-and-tempered EN19 can have different processing requirements.
Surface Finish
Bright, peeled, turned and ground bars involve additional processing compared with basic hot-rolled material.
Quantity
The quantity required can affect availability and commercial pricing.
Testing and Certification
MTC, mechanical testing, hardness testing, ultrasonic testing and third-party inspection can affect the quotation depending on the application.
Availability
Stock availability for a particular EN19 diameter can also influence lead time and price.
For an accurate EN19 Round Bar price in Mumbai, send the complete requirement rather than requesting only a generic per-kg rate.
How to Buy EN19 Round Bar
A useful enquiry should contain:
Material: EN19 / 709M40
Product: Round Bar
Diameter: ___ mm
Length: ___ mm
Condition: Annealed / Normalized / As required
Heat Treatment: Hardened & Tempered / Induction Hardened / As specified
Finish: Black / Bright / Ground / Turned
Quantity: ___ kg / pieces
Testing: MTC / Hardness / UT / Third Party / Other
Application: Shaft / Gear / Axle / Machinery Component / Other
If your requirement is based on an engineering drawing, provide the exact material designation and heat-treatment requirement shown on the drawing.
EN19 Round Bar Supplier in Mumbai
For companies searching for an EN19 Round Bar Supplier Mumbai, Manan Steel & Metals supplies engineering and specialty round bars for industrial requirements.
Manan’s published round-bar range covers a broad selection of engineering grades and different bar forms, making it suitable for buyers looking for steel round bars for machining, fabrication and industrial components. (Manan Steel & Metals)
When sending an enquiry for EN19, clearly mention:
EN19 / 709M40
Diameter
Length
Heat-treatment condition
Surface finish
Quantity
Testing requirement
Application
This helps ensure the quotation is prepared for the required EN19 condition rather than a generic alloy-steel bar.
Frequently Asked Questions
What is EN19 Round Bar?
EN19 Round Bar is a chromium-molybdenum alloy steel used for high-strength engineering components such as shafts, gears, axles, studs and machinery parts.
What is the designation of EN19 steel?
EN19 is commonly associated with the designation 709M40 in the historical BS system. The exact applicable specification should be confirmed for the project.
Is EN19 the same as 4140?
EN19 and AISI/SAE 4140 are commonly compared and are chemically similar alloy steels, but they should not automatically be treated as identical for every specification. The required standard, chemistry and mechanical properties must be confirmed before substitution.
Is EN19 suitable for shafts?
Yes. EN19 is widely used for shafts and other power-transmission components where high strength and toughness are required.
Can EN19 Round Bar be heat treated?
Yes. EN19 can be annealed, normalized, hardened and tempered, with selected components also receiving surface-hardening treatments such as induction hardening.
Is EN19 suitable for welding?
EN19 can be welded with appropriate controls, but its higher carbon and alloy content makes welding more demanding than low-carbon steel. A suitable welding procedure should be established for the specific component.
What affects EN19 Round Bar price?
Diameter, length, heat-treatment condition, surface finish, quantity, availability, inspection and documentation requirements can all influence the final price.
How can I get an EN19 Round Bar quotation in Mumbai?
Send the required EN19/709M40 grade, diameter, length, condition, finish, quantity and testing requirements to Manan Steel & Metals.
Request a Quote for EN19 Round Bar
Manan Steel & Metals
Shop No. 2, Hira Building, 97 Khetwadi Main Road (Nanubhai Desai Road), Girgaon, Mumbai – 400004, Maharashtra, India
Phone: 7977369869
Email: manansteel@gmail.com
Website: www.manansteel.com
For a faster quotation, send:
Material: EN19 / 709M40
Diameter: ___ mm
Length: ___ mm
Condition: ___
Heat Treatment: ___
Finish: ___
Quantity: ___ kg / pieces
Testing: ___
Application: ___
For industrial procurement, complete specification details help ensure that the quoted EN19 Round Bar matches the required engineering condition.
EN19 709M40 Steel Grade
EN19 is a chromium-molybdenum alloy steel commonly associated with the historical 709M40 designation. It is widely used for high-strength engineering components such as shafts, gears, axles and machinery parts.
The older BS 970-1:1991 specification covered wrought steels for mechanical and allied engineering purposes, including alloy steels, bars, chemical composition and mechanical testing. The standard has since been withdrawn, so buyers should confirm the current specification required by their drawing, customer or project. View the BS 970-1:1991 reference on BSI Knowledge.
BSI also explains that withdrawn standards can remain useful as historical references, but they should not automatically be treated as current standards. Read BSI’s guidance on withdrawn standards.
For procurement, a typical requirement can state:
Material: EN19
Designation: 709M40
Product: Round Bar
Diameter: Required size
Length: Required length
Condition: As specified
Heat Treatment: As required
Finish: As required
Quantity: Required quantity
When the material will be used for a critical engineering component, the purchaser should specify the required chemical composition, mechanical properties, heat-treatment condition and inspection requirements rather than relying only on the commercial term “EN19.”