How to Select a Forging Material
Most over-specification in Indian engineering comes from choosing a grade by reputation instead of by load case. This guide walks the decision the way our engineering team does it when a customer's drawing arrives without a grade called out.
- Load Type
- Static, fatigue, impact, wear
- Section Size Rule
- Above 60 mm consider EN19
- Wear Strategy
- Case or induction harden, don't over-alloy
- Cost Order
- EN8 < 1045 < EN19 < EN24 < stainless
- Corrosion
- Stainless only where actually needed
- Support
- Free grade recommendation with your drawing
How to Select a Forging Material at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Load Type: Static, fatigue, impact, wear
- Section Size Rule: Above 60 mm consider EN19
- Wear Strategy: Case or induction harden, don't over-alloy
- Cost Order: EN8 < 1045 < EN19 < EN24 < stainless
- Corrosion: Stainless only where actually needed
- Support: Free grade recommendation with your drawing
Step One: Define the Load Case
Static load, fatigue load or impact? Fatigue governs most forged parts and needs a clean, tough grade. Pure static strength is cheaper to buy. Impact loading demands toughness and rules out high-hardness grades outright.
- Static: cheapest adequate grade
- Fatigue: clean grade, good toughness
- Impact: toughness over hardness
- Wear: hard surface, tough core
Step Two: Check Section Size
Hardenability, not strength, decides thick-section grades. EN8 in a 100 mm section gives a soft core no certificate will show. Above roughly 60 mm requiring uniform properties, move to EN19; above 150 mm, to EN24.
Step Three: Separate Surface From Body
If only the surface wears, do not harden the whole part. Induction hardening EN8, or carburising 20MnCr5, gives a hard skin over a tough core at lower cost and lower risk than through-hardening an alloy grade.
People also ask
Will you recommend a grade if our drawing does not specify one?
Yes, free with your enquiry. Send the drawing with the load case and environment and we will propose a grade and heat treatment with the reasoning.
Is it safer to over-specify the grade?
No. Over-alloying reduces machinability and raises distortion and cracking risk without improving the property that actually governs the design.
Topics covered on this page
- forging material selection guide
- how to choose steel grade forging
- forging steel grade comparison India
- forging material consultancy
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Which grade should I choose for a shaft?
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EN8 for light duty, EN19 for loaded shafts above 60 mm section, EN24 for very large or shock-loaded shafts, SS 410 where mild corrosion resistance is also needed.
Will you recommend a grade for our drawing?
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Yes. Send the drawing with the load case and environment, and our engineering team will propose a grade and heat treatment with reasoning.
Is a more expensive grade always safer?
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No. Over-specifying alloy grades can reduce machinability and increase distortion risk without improving the property that actually governs the design.
How do I know the supplied material is correct?
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Every heat lot is spectro-verified on arrival at our plant, and results are reported against the mill certificate.