4140 or EN19 (Grade 8.8)

[Ravi Karuskar]

Dear Experts,

Pls. see below chemical composition and let me know which composition
is perfect for made Grade 8.8 material.

Mat. Carbon Molybdenum Chromium Manganese Phosphorous Sulfur Silicon
SAE4140 0.37-0.49 0.15-0.25 0.75-1.20 0.65-1.10 0.035max 0.040 0.15-0.35
En-19 0.35-0.45 0.20-0.40 0.90-1.50 0.50-0.80 0.035max 0.040 0.10-0.35

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Ravi Karuskar
Trelleborg Marine Systems India Pvt. Ltd.,
Akik,Bodakdev, S.G.Highway, Ahmedabad
Mob. 9727802502
Email : rkar...@gmail.com

[iacob catalin]

It's a function of heat treatment parameters- QT-; CLASS 8.8 -800 N/mmp-strengh rezistence and 640 N/mmp yeld strengh

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[Ravi Karuskar]

right but actually i want to know which chemical composition is far
better for achiving this mechanical properties.

Ravi

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[Harish Kannepalli]

Mr.Ravi,

              Below mentioned are alloy steel composition. Gr8.8 is plain carbon steel, so you may try 1040 round bars with suitable heat treatment.

2011/3/7 Ravi Karuskar <rkar...@gmail.com>

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regards,

Harish.