How Strong Is Forged Steel?
Forged steel strength depends almost entirely on grade and heat treatment, not on the forging itself. Forging's contribution is fatigue life and soundness, not the number on a tensile certificate.
Forged steel strength depends on grade and heat treatment: EN8 normalised gives 620–700 MPa, EN19 quenched and tempered 850–1,000 MPa, and EN24 925–1,075 MPa. Forging itself contributes a 20–40% fatigue life improvement through grain flow rather than raising tensile strength.
- EN8 normalised
- 620 – 700 MPa
- EN19 Q&T
- 850 – 1,000 MPa
- EN24 Q&T
- 925 – 1,075 MPa
- Fatigue improvement
- 20 – 40% from grain flow
- Governed by
- Grade and heat treatment
How Strong Is Forged Steel? at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- EN8 normalised: 620–700 MPa
- EN19 quenched and tempered: 850–1,000 MPa
- EN24 quenched and tempered: 925–1,075 MPa
- Forging adds 20–40% fatigue life, not tensile strength
Strength by Grade
EN8 normalised gives 620–700 MPa. EN19 quenched and tempered reaches 850–1,000 MPa. EN24 reaches 925–1,075 MPa. Micro-alloyed grades reach 800–1,000 MPa without heat treatment at all.
- EN8 normalised: 620–700 MPa
- EN19 Q&T: 850–1,000 MPa
- EN24 Q&T: 925–1,075 MPa
- Micro-alloyed: 800–1,000 MPa air cooled
Why Fatigue Matters More
Most components fail in fatigue, not by exceeding tensile strength. Forging improves fatigue life by 20–40% through grain flow — an improvement that never appears on a tensile test certificate but determines how long the part actually lasts.
People also ask
Is forged steel stronger than mild steel?
Forged EN19 or EN24 is far stronger than mild steel, but that is because of the alloy and heat treatment. Forged mild steel is still mild steel, with better fatigue behaviour than machined mild steel.
How is forged steel strength measured?
By tensile testing machined specimens for tensile strength, yield, elongation and reduction of area, with Charpy impact testing for toughness where specified.
Can hardness predict tensile strength?
Approximately. For steel, tensile strength in MPa is roughly 3.4 times the Brinell number — useful for cross-checking, not as a substitute for tensile testing.
Topics covered on this page
- forged steel strength
- tensile strength
- EN8
- EN19
- EN24
- fatigue life
- Brinell hardness
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
How strong is forged steel in MPa?
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It depends on grade and heat treatment: 620–700 MPa for normalised EN8, 850–1,000 MPa for quenched and tempered EN19, 925–1,075 MPa for EN24.
Does forging itself make steel stronger?
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It improves fatigue life by 20–40% through grain flow and removes porosity, but tensile strength comes from grade and heat treatment.
Which is the strongest forging steel you use?
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EN24 quenched and tempered among common grades; higher strengths are achievable with specialist alloys where the application justifies them.