EN19 Flat Bar 
                     BLOG
April 22, 2025
EN19 Flat 
TBhea ENr19 Flat Bar is a solid rectangular shape. This steel is also known as 
4140 steel. It contains important ingredients such as chromium, 
molybdenum and carbon. These elements improve steel strength, hardness 
and wear resistance. The EN19 bar is designed for use in areas where high 
tensile strength and good machining are required. It helps in many 
industries.
The shape of a  at bar helps in easy machining, welding, and cutting. EN19 
Bars are cut from EN19 steel plates or made through rolling methods. The 
quality of the  at bar
depends on the raw material and the process used. EN19 Flat Bar is one 
of the most preferred choices for engineers and industries where 
performance matters.
Uses of EN19 Flat Bar
The EN19  at bar can be used in many ways in industries. Here are some 
of the most common uses:
Construction of gear, shaft and axle
Machine components that handle stress and 
load Automotive parts like Crankshaft and 
Connecting Rods Agricultural Machinery and 
Equipment
Heavy tools and construction 
parts Fixtures, jigs, and dies
Engineering components used 
in railways and aviation
The strength and wear resistance of EN19 Flat Bar make it suitable for these 
applications. It is also used in oil and gas sectors and industrial machinery 
Cwhehree hemat aincd aprels suCreo arme higph.osition of EN19 
Flat BaElrement Percentage (%)
Carbon (C) 0.36 – 0.44
Manganese (Mn) 0.70 – 1.00
Chromium (Cr) 0.90 – 1.20
Molybdenum (Mo) 0.15 – 0.30
Silicon (Si) 0.10 – 0.35
Sulphur (S) Max 0.035
Phosphorus (P) Max 0.035
Each element in this composition plays a special role. Carbon improves 
hardness. Chromium helps in corrosion resistance. Molybdenum increases 
strength. Manganese and silicon support toughness.
Mechanical Properties of EN19 
Flat Bar
Property Value
Tensile Strength 850 – 1000 MPa
Yield Strength 680 MPa (min)
Elongation 13% (min)
Impact Value 55 Joules (C harpy V)
Hardness (HB) 248 – 302
Mechanical properties show how the EN19 Flat Bar will perform under di  
erent loads and pressures. High tensile and yield strength mean the bar can 
carry heavy loads. Elongation shows it can bend slightly without breaking. 
Impact value helps in shock applications.
Heat Treatment Process of 
EN19 Flat Bar
Heat treatment changes the structure of the steel. It makes the EN19 Flat 
Bar strong and hard. Here is the general heat treatment process:
1.Hardening:
Heat the  at bar to around 850°C – 
880°C. Then, quench it in oil to lock 
the hardness.
2.Tempering:
After hardening, tempering is done 
at 400°C – 650°C.
This step reduces internal stress 
and increases toughness.
3.Annealing:
Heat to 680°C – 700°C and allow it to cool in a 
furnace. This softens the bar for easier 
machining.
4.Stress Relieving:
Heat to 600°C – 650°C after 
machining. Cool slowly to reduce 
internal stress.
Heat treatment helps match the EN19 Flat Bar to speci c needs. For 
example, a part needing more  exibility will be tempered longer.
Size and Length Availability
EN19 Flat Bars are available in many sizes. This allows easy 
selection based on application. Here are common size ranges:
Parameter Range
Width 20 mm to 300 mm
Thickness 5 mm to 100 mm
Standard Length 6 meters (customization)
Custom sizes and cut-to-length options are available. This is helpful when 
the bar is used in machine building or construction. Some industries need 
exact measurements, and custom cutting saves time and cost.
Why Choose Alloy Carbon 
Steel for EN19 Flat Bar?
Alloy Carbon Steel is a trusted supplier of EN19 Flat Bars. Here is why people 
prefer them:
They supply EN19 Flat Bars that match industrial 
standards. They o er bars with proper heat 
treatment.
All bars are checked for size accuracy.
They provide custom sizes based on project 
requirements. Delivery is on time and handled 
with care.
They share test certi cates for trust and 
reliability.
Choosing Alloy Carbon Steel helps avoid delays and poor material. You get 
consistent quality and good support. If you are working on high-pressure 
machinery or heavy-duty equipment, they are a reliable partner.
Ultrasonically Tested and 
Approved EN19 Flat Bars
EN19 Flat Bars from Alloy Carbon Steel are ultrasonically tested. This test 
checks the inside of the bar. Ultrasonic machines send sound waves through 
the bar. If there are any cracks or gaps, the machine will detect them.
Ultrasonic testing ensures the bar has no hidden problems. This test is 
important for parts that carry load or rotate. Bars that pass this test are 
approved for use in critical jobs.
Each EN19 Flat Bar gets a quality certi cate after testing. This gives con 
dence to the buyer. It shows the material is strong and safe. Companies 
that make machines, vehicles,
or tools can trust these 
bars.
Extra Applications of EN19 
FBeslidaest th eB usaes ralready discussed, here are more applications:
Oil eld parts
Power plant equipment
Aircraft landing gear 
components Forging dies
Hydraulic machinery parts
These applications show the  exibility of EN19 Flat Bars. They are strong 
and easy to shape or machine. That makes them helpful in many 
technical and industrial setups.
Machining and Welding EN19 
Flat Bar
You can easily machine EN19 Flat Bar using standard tools. However, for the 
best results, make sure to heat-treat the bar before machining. This step 
helps shape the bar smoothly and prevents cracking during the process.
Welding EN19 Flat Bar is also possible, but it requires careful handling. Always 
preheat the bar before welding and apply post-heating afterward. These 
steps reduce the chances of cracks or stress buildup. Additionally, use low 
hydrogen electrodes to improve weld quality and avoid welding defects.
When you follow the right methods, EN19 Bars perform well in both 
machining and welding, making your project smoother and more 
reliable.
Storage and Handling of EN19 
Flat Bar
Store EN19 Flat Bars in dry, covered areas to protect their quality. Always 
keep them away from moisture, as rust or corrosion can reduce their 
strength and performance. To maintain their shape, place the bars on 
wooden blocks or racks instead of directly on the ground.
When handling these bars, avoid dropping or dragging them, as this can 
cause damage. Instead, use proper lifting tools to move them safely and 
smoothly. This not only prevents wear but also makes the process more e  
cient.
Conclusion
EN19 Flat Bar is a strong and widely used steel product. It comes from 
chromium- molybdenum carbon alloy steel and performs well in tough 
conditions. Because of its strength, it easily handles high loads and 
pressure. When you apply proper heat treatment, the EN19 Flat Bar 
becomes even more powerful and dependable.
At Alloy Carbon Steel, we supply di erent sizes to match your project needs. 
We also test each bar using ultrasonic methods. This helps us make sure 
there are no hidden cracks or problems. As a result, you receive bars that 
are ready for direct use in machines, tools, and construction projects.
If you’re working on a project that demands strong and reliable steel, 
choosing EN19 Flat Bar from Alloy Carbon Steel is a smart move. You get 
the exact size, proper treatment, and tested quality—all in one place. This 
makes your job easier, helps you meet deadlines, and ensures safe, long-
lasting results.
For More Information:
Company Name – Alloy carbon 
steel Phone no. – 8076217931
Mail I’d – sumit_garg_1@ y
ahoo.co.in
Location – 693 Saini Vihar, Mundka, Delhi 
110041 Website – Alloycarbonsteel.com
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