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Mild Steel

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IS Standards

Bureau of Indian Standards – BIS

IS 2062 – Hot Rolled Medium and High Tensile Structural Steel

Grades
  • E250 (Fe 410W), E275, E300, E350, E410, E450
  • E250 = Yield strength 250 MPa, commonly referred to as MS plate/structural grade
  • Subdivided into Quality A, B, C (based on chemical composition and testing requirements).

IS 277 – Galvanized Mild Steel Sheets (for MS base metal before galvanizing).

IS 513 – Cold Rolled Low Carbon Steel Sheets

Grades
  • D (Deep drawing quality)
  • DD (Extra deep drawing)
  • EDD (Extra extra deep drawing)
  • IF (Interstitial Free steel for critical forming)

IS 1079 – Hot Rolled Low Carbon Steel Sheets & Strips

  • Commercial quality & Drawing quality grades.

IS 5986 – Hot Rolled Steel for Structural Purposes

  • Non-alloy, high strength MS grades with yield strength 250–450 MPa.

IS 432 / IS 1786 – Mild Steel Wires & TMT Bars (Fe 415, Fe 500, Fe 550 etc. – though technically higher tensile, many fall under MS category for reinforcement steel).

Mild Steel

Common Trade Names in
Indian Market

IS 2062 E250 / Fe 410

MS Plates

IS 2062 E250 / E350

MS Flats, Angles, Channels, Beams

IS 1079 (HR), IS 513 (CR)

MS Sheets (Hot Rolled/Cold Rolled)

IS 1239, IS 3589

MS Pipes/Tubes (based on diameter & pressure classes)

Equivalent International Standards Used in India

ASTM
  • A36 (structural), A283 (carbon steel), A569 (commercial quality)
EN
  • S235JR, S275JR, S355JR (structural steels)
JIS
  • SS400 (structural mild steel), SPCC/SPCD/SPCE (CR sheets)
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