Chrome Moly EN19A Alloy Steel Bars

Name: Chrome Moly EN19A Alloy Steel Bars
Brand: JAYANT IMPEX
Price: 96.0 INR
Availability: InStock

96.0 INR/Kilograms

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Product Details:

Technique Hot Rolled / Forged
Specific Use High Strength Mechanical Components
Processing Heat Treatment, Annealed, Tempered
Diameter 8mm to 350mm
Material Chrome Moly EN19A Alloy Steel
Type Round Bars, Square Bars
Standard EN19A
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Chrome Moly EN19A Alloy Steel Bars Price And Quantity

Minimum Order Quantity 1 Kilograms
Price 96.0 INR/Kilograms

Chrome Moly EN19A Alloy Steel Bars Product Specifications

Diameter 8mm to 350mm
Processing Heat Treatment, Annealed, Tempered
Specific Use High Strength Mechanical Components
Technique Hot Rolled / Forged
Material Chrome Moly EN19A Alloy Steel
Type Round Bars, Square Bars
Standard EN19A
Application Engineering, Construction, Machinery, Automotive parts, Shafts, Axles, Spindles
Length Up to 6 Meters (Custom Lengths Available)
Finish Bright / Black / Peeled / Polished
Tolerance H9, H11, H13 or as per customer requirement
Grade EN19A

Shapes Available Round, Square, Hex, Flat Bars
Packaging Standard Export Sea-Worthy Packaging, PE Wrapping
Supply Condition Heat Treated, Normalized, Annealed, Quenched & Tempered as specified
Elongation 16 - 22% (in 50 mm, depending on condition)
Surface Condition Rust-Proof Oil Coated / As Required
Ultimate Tensile Strength 850-1000 MPa
Hardness 28-34 HRC typical (Heat Treated)
Yield Strength 800-950 MPa (varies by condition)

Product Description

EN19A belongs to the highly trusted high-tensile Chromium-Molybdenum (Chrome Moly) alloy family. It is a distinct variant of the classic EN19 grade (originally under the British BS 970 standard), heavily utilized in bar form for heavy-duty engineering, automotive, and oil and gas components.

When you specify round, square, or hexagonal bars in EN19A, you are dealing with a material specifically engineered to handle massive torsional loads, shock loading, and fatigue.

The "A" Difference: EN19 vs. EN19A

While standard EN19 is the direct equivalent to the world-famous AISI 4140 or 42CrMo4, EN19A is a slightly refined subtype often used to optimize processing.

Lower Manganese & Tighter Impurity Control: EN19A slightly drops the manganese window ( $0.50% - 0.80%$ compared to EN19's $0.60% - 0.90%$ ) and strictly regulates Phosphorus and Sulfur levels.
The Practical Impact: Lowering these impurities directly translates to enhanced impact toughness and superior weldability compared to the baseline grade. It drastically reduces the risk of thermal cracking if the bars undergo structural fabrication, though standard pre-heating and post-weld stress relieving are still mandatory.

Chemical Composition Breakdown

The material properties of EN19A bars stem from a precise chemical recipe:

Element	Composition (%)	Primary Role in the Alloy
Carbon (C)	$0.35% - 0.45%$	Sets the core tensile strength and baseline hardenability.
Chromium (Cr)	$0.90% - 1.20%$	Enhances surface hardness, depth of hardening, and wear resistance.
Molybdenum (Mo)	$0.15% - 0.35%$	Prevents temper brittleness, improves high-temperature creep resistance, and ensures uniform core strength.
Manganese (Mn)	$0.50% - 0.80%$	Acts as a deoxidizer and aids deep through-hardening during heat treatment.
Silicon (Si)	$0.15% - 0.35%$	Increases overall elasticity and strength.

Supply Conditions & Mechanical Performance

EN19A bars are incredibly versatile because they respond flawlessly to various heat treatment states. When purchasing bars, they are typically supplied in one of two major conditions:

1. Annealed Condition (Soft State)

Hardness: $le$ 250 HB (Brinell)
Purpose: This is the ideal state for complex machining, milling, or drilling. The steel is soft enough to preserve tool life while maintaining geometric accuracy. Once machined, the component is heat-treated to its final working hardness.

2. Hardened & Tempered (Condition "T" or "U")

Most structural applications order bars pre-conditioned to specific tensile bands:

Tensile Strength: 850 1000 MPa (Condition T) up to 1050 MPa (Condition U).
Yield Strength: $sim$ 650 700 MPa.
Final Hardness: Can range from 28 to 34 HRC (Rockwell C) for general structural work, or be induction/flame-hardened at the surface to 55+ HRC for wear interfaces (like gear teeth or shafts).

Common Industrial Applications

Because of its reliable response to torque and shock, EN19A bars are machined into:

Drivetrain Components: Axles, high-stress crankshafts, propeller shafts, and connecting rods.
Industrial Fastening: High-tensile studs, heavy-duty structural bolts (Grade 9.8 and 10.9 specifications).
Power Transmission: High-load gears, pinions, splined shafts, and machine spindles.
Oil & Gas Exploration: Downhole tool joints, drill collars, and high-pressure couplings.

Global Cross-Reference Equivalents

If you are matching international drawings, EN19A bars effectively align with:

USA: AISI 4140 / SAE 4140
Europe / Germany: 42CrMo4 / WNr 1.7225
Japan: JIS SCM440
UK (Modern Standard): BS 970 708M40 / 709M40

Engineered Strength for Critical Components

EN19A Chrome Moly Alloy Steel Bars provide exceptional mechanical strength and toughness, enabling their use in high-stress parts like shafts, axles, spindles, and other machine components. Precision heat treatment processes further enhance their hardness and endurance, catering to industries with rigorous performance demands.

Versatile Supply and Customization Options

Available in round, square, hex, and flat profiles, these steel bars can be tailored in length, diameter, finish, and tolerance, providing flexibility for diverse engineering applications. Whether annealed, normalized, or quenched & tempered, each bar is manufactured to match specific project needs and industry standards.

FAQ's of Chrome Moly EN19A Alloy Steel Bars:

Q: How are Chrome Moly EN19A Alloy Steel Bars typically processed for required mechanical properties?

A: EN19A bars undergo heat treatment processes such as annealing, normalizing, quenching, and tempering. These processes enhance hardness, yield strength, and tensile strength according to specified requirements, making them ideal for high-strength applications.

Q: What industries commonly utilize EN19A Alloy Steel Bars and for what applications?

A: These bars are widely used in engineering, construction, machinery, and the automotive sector due to their robust mechanical properties. Typical applications include shafts, axles, spindles, and other high-strength, wear-resistant mechanical components.

Q: When should EN19A Alloy Steel Bars be selected over other grades?

A: EN19A is chosen when applications demand a combination of high tensile strength, hardness (28-34 HRC), and good elongation (16-22%). It is especially suitable for parts exposed to heavy loads or dynamic stresses and where component reliability is essential.

Q: Where are EN19A Alloy Steel Bars commonly supplied from and to?

A: As an established manufacturer, dealer, and exporter in India, EN19A Alloy Steel Bars are supplied both domestically and internationally. They are provided to original equipment manufacturers, fabricators, and traders across the globe.

Q: What are the available surface conditions and finishes for EN19A Alloy Steel Bars?

A: Bars are offered with rust-proof oil coatings, and finishes such as bright, black, peeled, or polished as per customer needs. These surface treatments help enhance durability and prevent corrosion during storage and transit.

Q: How are these steel bars packaged to ensure safe delivery?

A: EN19A Alloy Steel Bars are securely packed using standard export sea-worthy packaging, often with PE wrapping, to prevent mechanical damage and corrosion during shipping, ensuring the material arrives in optimal condition.

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