EN19 42CrMo4 Round Bars
EN19 42CrMo4 Round Bars are chromium-molybdenum alloy steel bars used extensively in demanding engineering applications. Their combination of strength, toughness, hardenability and wear resistance makes them suitable for components exposed to mechanical loads and repeated stresses.
EN19 is a widely recognized alloy steel grade used in British engineering applications, while 42CrMo4 is a European grade specified under EN 10083 and identified by material number 1.7225. Both grades are commonly selected for high-strength mechanical components.
The material can be supplied in different conditions such as annealed, normalized, hardened and tempered, subject to the applicable specification. Heat treatment allows the mechanical properties of the material to be adapted for particular engineering applications.
What is EN19 42CrMo4 Round Bar?
EN19 Round Bar is an alloy steel round bar commonly identified with grade 817M40 and widely used for high-strength engineering components. It contains chromium and molybdenum as important alloying elements.
42CrMo4 Round Bar is a chromium-molybdenum alloy steel grade specified under European standards and identified by material number 1.7225. It is commonly used for quenched and tempered mechanical components.
EN19 and 42CrMo4 are frequently compared with AISI 4140 / SAE 4140 because of their similar alloy-steel characteristics. However, the exact chemical composition, mechanical properties and applicable standard should be checked before treating grades as interchangeable.
Advantages of EN19 42CrMo4 Round Bars
- High Strength: Suitable for heavily loaded mechanical components.
- Excellent Hardenability: Chromium and molybdenum contribute to hardenability through the material section.
- Good Toughness: Provides a useful balance of strength and toughness after suitable heat treatment.
- Good Wear Resistance: Heat-treated material can provide improved resistance to mechanical wear.
- Fatigue Resistance: Suitable for components subjected to repeated loading when properly designed and heat treated.
- Machinability: Can be machined using appropriate tools and machining conditions.
- Heat Treatment Capability: Can be supplied in annealed, normalized and quenched-and-tempered conditions according to requirements.
EN19 42CrMo4 Round Bars Manufacturing Process
The manufacturing and processing of EN19 42CrMo4 Round Bars involves controlled stages to achieve the required dimensions, surface condition and mechanical properties.
Raw Material Selection
Suitable alloy steel raw material is selected according to the specified EN19 or 42CrMo4 grade and applicable material standard.
Heating
The steel is heated under controlled conditions before hot working to support uniform processing.
Hot Rolling
The heated material is rolled to produce the required round-bar shape and approximate dimensions.
Forging
Forging can be used for larger or specialized EN19 and 42CrMo4 components where forged material is required.
Heat Treatment
Depending on the specified condition, the bars may undergo annealing, normalizing, hardening, quenching and tempering.
Cutting and Straightening
Bars can be straightened and cut to required commercial or customer specified lengths.
Surface Finishing
Depending on size and requirements, bars may be supplied in black, bright, turned, peeled or ground finishes.
Inspection
Inspection may include dimensional inspection, surface inspection, chemical analysis and mechanical testing according to the applicable specification.
EN19 42CrMo4 Round Bars Material Specification
| Grade | EN19 / 817M40 / 42CrMo4 |
|---|---|
| Material Type | Chromium Molybdenum Alloy Steel |
| Material Number | 1.7225 |
| UNS | G41400 for AISI 4140 equivalent specification |
| Standards | EN, DIN, BS, ASTM, ASME, AISI, SAE, JIS |
| Diameter | 5 mm to 500 mm |
| Length | 1000 mm to 6000 mm |
| Finish | Bright, Black, Forged, Turned, Peeled, Ground |
| Form | Round, Billet, Ingot, Forging |
| Supply Condition | Annealed, Normalized, Hardened & Tempered, Quenched & Tempered |
EN19 / 42CrMo4 / AISI 4140 Round Bars Grade Comparison
| Country | USA | Germany / Europe | British | Japan | China |
|---|---|---|---|---|---|
| Standard | AISI / ASTM | EN / DIN | BS | JIS | GB/T |
| Grade | 4140 | 42CrMo4 / 1.7225 | EN19 / 817M40 | SCM440 | 42CrMo |
EN19 42CrMo4 Round Bars Chemical Composition
The chemical composition of EN19 and 42CrMo4 depends on the applicable standard and product specification. Chromium and molybdenum are important alloying elements that contribute to hardenability and mechanical performance.
The actual composition should always be confirmed against the applicable standard and the Mill Test Certificate supplied with the material.
| Element | Typical Composition |
|---|---|
| Carbon (C) | Approx. 0.38 – 0.43% |
| Manganese (Mn) | Approx. 0.60 – 0.90% |
| Silicon (Si) | Approx. 0.15 – 0.40% |
| Chromium (Cr) | Approx. 0.90 – 1.20% |
| Molybdenum (Mo) | Approx. 0.15 – 0.30% |
| Phosphorus (P) | As per applicable specification |
| Sulfur (S) | As per applicable specification |
EN19 42CrMo4 Round Bars Mechanical Properties
Mechanical properties vary according to grade, section size, heat treatment and applicable material specification. The following values are representative and should be verified against the specified material condition and test certificate.
| Property | Typical Value / Range |
|---|---|
| Tensile Strength | 850 – 1100 MPa |
| Yield Strength | 650 – 900 MPa |
| Hardness | Approx. 28 – 34 HRC after suitable Q&T |
| Elongation | As per applicable specification and heat treatment |
EN19 42CrMo4 Round Bars Applications
EN19 and 42CrMo4 Round Bars are widely used in engineering and manufacturing applications where high strength, toughness and hardenability are required.
Automotive Components
Used for suitable shafts, axles, gears, pins, crankshafts and other mechanically loaded automotive components.
Engineering Components
Suitable for shafts, spindles, rollers, studs, pins, bolts and other high-strength engineering components.
Gears and Shafts
EN19 and 42CrMo4 are commonly selected for mechanically loaded gears, shafts and rotating components requiring suitable strength and toughness.
Forging Components
Suitable for selected forged components used in automotive, machinery and heavy engineering applications.
Hydraulic Components
Can be used for suitable hydraulic shafts, pins, rods and mechanically loaded components.
Machine Components
Used in machine tools, industrial machinery and equipment components where alloy steel properties are required.
EN19 42CrMo4 Round Bars Heat Treatment
Heat treatment is an important part of achieving the required mechanical properties of EN19 and 42CrMo4 alloy steel. The appropriate treatment depends on the application, section size and specified material condition.
Annealing
Annealing can provide a softer material condition and support subsequent machining operations.
Normalizing
Normalizing can help develop a suitable and uniform microstructure.
Hardening
Hardening increases the hardness and strength of the alloy steel through controlled heating and cooling.
Quenching
Quenching is used as part of the hardening process to develop the required material structure.
Tempering
Tempering after hardening helps achieve a suitable combination of strength, hardness and toughness.
EN19 Round Bars for Automotive Industry
EN19 alloy steel is suitable for selected automotive components that require a combination of strength, toughness and fatigue performance. Applications can include shafts, axles, gears, pins and other mechanically loaded parts.
42CrMo4 Round Bars for Engineering Industry
42CrMo4 Round Bars are widely used for engineering components subjected to mechanical loads. The material can be supplied in suitable heat-treated conditions depending on the specified application.
EN19 42CrMo4 Round Bars for Forging
EN19 and 42CrMo4 can be used for selected forged components where high strength, toughness and hardenability are required. Forging parameters and subsequent heat treatment should be selected according to the applicable material specification.
EN19 42CrMo4 Round Bars for CNC Machining
These alloy steel round bars can be machined into shafts, pins, gears, spindles, rollers and other precision components. Machining conditions should be selected according to the supplied material condition and component requirements.
EN19 42CrMo4 Round Bars Quality Assurance
Quality documentation and material traceability are important for alloy steel products used in engineering applications. Relevant documentation can be supplied according to the applicable specification and customer purchase order requirements.
- Mill Test Certificate
- Chemical Composition Report
- Mechanical Test Report
- Dimensional Inspection Report
- Surface Inspection
- Material Traceability
- Third-Party Inspection on Request
EN19 42CrMo4 Round Bars Packing
Round Bars can be packed according to diameter, length, quantity and transportation requirements. Suitable bundling, protective wrapping, wooden packing and other packaging methods can be considered according to the order and dispatch requirements.
MOQ, Lead Time & Payment
Minimum Order Quantity:
MOQ depends on diameter, quantity, stock availability and production
requirements.
Lead Time:
Lead time depends on stock availability, quantity, cutting, inspection,
heat treatment and documentation requirements.
Payment Terms:
Commercial payment terms can be discussed according to order quantity,
customer requirements and supply conditions.
Why Choose Super Metal for EN19 42CrMo4 Round Bars?
- Since 1965: Decades of experience in the metal industry.
- Alloy Steel Expertise: Supply support for EN19, 42CrMo4 and related alloy steel grades.
- Multiple Sizes: Different diameters and lengths according to specification and availability.
- Multiple Finishes: Bright, black, forged, turned, peeled and ground finishes.
- Heat Treatment: Annealed, normalized and heat-treated conditions according to requirements.
- Quality Documentation: Relevant material and inspection documentation can be supplied.
- Industrial Applications: Suitable supply support for automotive, engineering, machinery, forging and manufacturing industries.
Frequently Asked Questions (FAQs)
What are EN19 42CrMo4 Round Bars?
EN19 and 42CrMo4 are chromium-molybdenum alloy steel grades used for high-strength engineering components. EN19 is commonly associated with 817M40, while 42CrMo4 is identified by material number 1.7225.
Is EN19 the same as 42CrMo4?
EN19 and 42CrMo4 have similar alloy-steel characteristics and are often compared for engineering applications, but they are not automatically identical in every specification. Chemical composition and mechanical requirements should be checked against the applicable standard.
Is 42CrMo4 equivalent to AISI 4140?
42CrMo4 and AISI 4140 are commonly considered comparable chromium- molybdenum alloy steels, but exact equivalence should be confirmed by comparing the applicable chemical composition, mechanical properties and material standards.
What are EN19 Round Bars used for?
EN19 Round Bars are used for shafts, gears, axles, pins, spindles, rollers, studs, crankshafts, automotive components, machinery parts and other mechanically loaded engineering components.
What are 42CrMo4 Round Bars used for?
42CrMo4 Round Bars are used for shafts, gears, axles, machine components, forgings, hydraulic components and other applications requiring strength, toughness and hardenability.
Can EN19 42CrMo4 Round Bars be heat treated?
Yes. Depending on the required material specification, EN19 and 42CrMo4 Round Bars can be supplied in annealed, normalized, quenched and tempered, or hardened and tempered conditions.
What finishes are available for EN19 42CrMo4 Round Bars?
Depending on size and requirements, EN19 and 42CrMo4 Round Bars can be supplied in black, bright, turned, peeled, ground and forged finishes.
What sizes of EN19 42CrMo4 Round Bars are available?
EN19 and 42CrMo4 Round Bars can be supplied in different diameters and lengths according to the applicable specification, stock availability and customer requirements.
Are EN19 and 42CrMo4 suitable for automotive applications?
Yes. These alloy steel grades are suitable for selected automotive and auto-component applications such as shafts, axles, gears, pins and other mechanically loaded components, subject to design requirements.
Do you provide Mill Test Certificates for EN19 42CrMo4 Round Bars?
Relevant material and inspection documentation can be supplied according to the applicable specification and customer purchase order requirements.
How can I request a quotation for EN19 42CrMo4 Round Bars?
You can send the required grade, diameter, length, quantity, finish and heat-treatment condition by email or WhatsApp to receive availability and commercial details.