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I'm a student of Mechanical Engineering and recently my professor of Metallography and Heat Treatment I suggested that we do a seminar on a steel called ASTM A572 Gr. 50D, but it is very difficult to find any information about this material. Can any of you tell me if there is any scientific work on this steel or if it has another name?

Below is the composition and hardness for each treatment.

Chemical Composition:

C - 0,13
Si - 0,24
P - 0,020
S - 0,008
Mn - 1,29
Ni - 0,012
Cr - 0,017
V - 0,006
Ceq(*) - 0,36

Hardness values for each treatment (HRB):

  • Annealed: 70
  • Normalized: 76 - 78
  • Quenched/Hardened: 96 - 98
  • Tempered at 200°C: 72 - 78
  • Tempered at 400°C: 100
  • Tempered at 600°C: 92 - 93
Jerry Coffin
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Gabriel Sodré
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1 Answers1

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To my knowledge there is no such thing as "ASTM A572 Grade 50D". ASTM A572 is supplied in just five grades, Grade 42, 50, 55, 60, and 65. This type of steel is also not normally heat treated because of its low hardenability; with post-weld stress relief being an uncommon exception.

A572 Grade 50 typically has yield strengths between 50 and 60ksi and tensile strengths between 70 and 80ksi. 80ksi tensile strength is approximately 84HRB.

What exactly needs to the be goal/subject of your seminar? Typically steels are considered for strength, formability, weldability, and/or machinability.

ASTM A572 Grade 50 is readily available and appropriate for all of the considerations. Perhaps you could research why that it is.

Lost Llama
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