Mild Steel Grade Chart

Mild Steel Grade Chart

Table of contents

Mild Steel Grades

Grades EN24 EN8 EN3B EN1A

AISI 1020

AISI 1015

 AISI 1010 AISI 1018
Approximate Equivalents 1.6565 DIN 1.0511 1.1151 1.0715 DIN 1.0044 DIN 1.0401 DIN 1.0301 DIN 1.0419

Select the Right Grade of Mild Steel for Your Construction and Structures Application

MS Grades for Construction and Structures Application

Standard Grade Minimum Yield Strength (MPa)
IS 2062 E250 250 MPa
E350 350 MPa
S235 235 MPa
S275 275 MPa
S355 355 MPa
ASTM A36 250 MPa
ASTM A992 345 MPa
EN 1.0301  200 N/mm²
EN 1.1121 290 MPa

MS Chemical Composition

  C Si Mn P S Mo Cr Ni Fe Iron
EN24T 0.36-0.44 0.10-0.35 0.45-0.70 0.035 max 0.04 max 0.20-0.35 1.00-1.40 1.30-1.70 Balance  
S275JR 0.25 max 0.05 max 1.6 0.04 0.05 - - - - Balance
EN3B 0.16 - 24 0.35 max 0.50 - 0.90 0.05 max 0.05 max - - - - Balance
EN8 0.35 - 0.45 0.05 - 0.35 0.60 - 1.00 0.015 - 0.06 0.015 - 0.6 - - - - Balance
T45 0.17-0.25 0.1 – 0.35 max 1.3 - 1.7 0.04 max 0.04 max 0.1 max 0.25 max 0.4 max Balance  
EN1A 0.15 max 0.25 - 0.35 0.90 - 1.30 0.07 max 0.40 max - - - - Balance
Check Above Mild Steel Properties and Select Right Grades for Your Construction and Structures Application

Mild Steel Alloy Mechanical Properties

Grades EN8 EN1A EN9 EN 24 AISI 1010 AISI 1018 AISI 1015 AISI 1020 S355 J0 S275 J0
Brinell Hardness - - 201-255 194-399 HB 105 126 111 121 146 121
Yield Strength (MPa) 530 290 >280-540 330-989 305 370 325 350 355 275
Tensile Strength (MPa) 660 MPa 400 695-850 MPa 451-1596 MPa 365 440 385 420 510 - 680 430 - 580
Steel Density kg/m3 7.85 g/cm3 8.08 8.08 8 7.87 7.87 7.87 7.87 7.8 7.85
Modulus of Elasticity (GPa) 190 GPa 190 GPa 210 GPa 190-210 GPa 205 205 205 186 210 205
Elongation at Break (%) 7 18 - 7-21% 20 15 18 15 20 21
Find Above Grade wise mild steel strength

Hot rolled mild steel grades is suitable for high-heat applications

HR Mild Steel Grades

Grade Standard Yield Strength (MPa) Tensile Strength (MPa) Elongation (%)
ASTM A36 ASTM 250 400-550 20-23
S235 EN 10025 235 340-470 26
S275 EN 10025 275 430-580 22
S275JR EN 1.0044 275 MPa 430–580 MPa 12-22
S355 EN 10025 355 470-630 22
S355JR ASTM A572 Gr 50 355 N/mm² 470-630 MPa.  22
Q235 GB/T 700 235 370-500 20-25
Q345 GB/T 700 345 470-630 20-22
C1010 ASTM 305 MPa 410 MPa 20
C1018 AISI 1018 310 MPa to 420 MPa 380 MPa to 540 MPa 28

Mild Steel Electrical Conductivity

Material Electrical Conductivity (S/m) Relative Conductivity
Mild Steel 6 to 7 × 10^6 ~10% of copper

How to Finish MS Fabrications

  • Powder Coating: tough, long-lasting finish
  • Wet Painting
  • Hot dip galvanising
  • Electroplating
mild steel fabrications

Structural Mild Steel Grades are Known for Good Impact Resistance

Structural MS Grades

Structural MS Grades
Grades Yield Strength
S275 275 N/mm²
S355 355 N/mm²
A36 250 MPa
S275JR 275 MPa
S355JR 355 N/mm²

Mild Steel Welding Guide

Welding mild steel to Itself Corten Galvanised mild steel Brass Copper Stainless steel Bronze Cast iron Aluminium
Use filler wire type
  • Rutile
  • 6013
  • lo hy
  • 7018
  • 7024
  • sifsteel 11
  • Lo hy
  • rutile
  • 6013
  • 7018
  • 7024
  • sifsteel 11
  • lo hy
  • Sifredicote 1
  • rutile
  • sifsteel 11
  • 7024
  • 7018
  • 6013
  • Sifbronze 8
  • Sifbronze 8
  • Sifbronze 8
  • sifsteel 312
  • Sifbronze 8
  • Sifbronze 2
  • Pre-coat mild steel with sif silver
  • solder 40
  • solder 43 then weld using
  • sifalumin 15

MS EN8 Weldability

Weldability Arc Gas Brazability Resistance
Value Excellent Excellent Very good Very good
Bright mild steel grades are widely used in structural applications and automotive parts

Bright MS Grades

Bright MS Grades
En3B (080A15) En1A (230M07) En8 En9
En16 En24 080M40 (BS 970-1:1991) 070M55 (BS 970-1:1991)

Mild Steel Equivalent Material

  AISI / ASTM A29 BS & DIN European BS DIN Werkstoff No BRITISH BS 970:1991 AISI / SAE BRITISH BS 970:1955 EN AFNOR JIS G4051
EN24   34CrNiMo6 817M40 / 817M40T 1.6565, 40NiCrMo84   4340/9850 EN24 EN10277-5 35NCD6  
EN8 1038, 1040, 1045 C40, CK40, C45, CK45 080A40 1.0511, 1.1186, 1.1189 080M40, 080A42 1040, 1042 EN8, EN8D     S40C, S45C
EN9     070M55 CK55   1055   EN9    
EN1A   9SMn28, BS En 11SMn30   1.0715 230M07 1213, 1215 EN1A      

EN24 Temper Chart

Temper designation EN24 T EN24 V EN24 U EN24 W EN24 Y EN24 X EN24 Z
Impact strength KCV 35 J 42 J 42 J 35 J 2 J 28 J 9 J
Vickers Hardness 252-303 292-361 271-342 311-393 376-448 351-406 458
Tensile strength 850-100 N/mm2 100-1150 N/mm2 925-1075 N/mm2 1075-1225 N/mm2 1275-1375 N/mm2 1150-1300 N/mm2 1550 N/mm2
Elongation 13% 12% 12% 11% 10% 10% 5%

Mild Steel Poisson Ratio

Material Poisson's Ratio
Mild Steel ~0.29 to 0.30

Mild Steel Melting Point

MS Melting Point : 1350–1530°C (2462–2786°F)

Cold Rolled Mild Steel Grades Contains Lower Carbon Content upto 0.3%

S275JR Applications

  • Automotive Industry
  • Manufacturing
  • Construction
  • Machinery Parts
  • Industrial
  • Steel Frame Buildings
  • Gates and Fencing
  • Pipelines

Benefits of Grade 250 Steel

  • Cost-effectiveness
  • Easy to weld
  • Easy to form

Mild Steel Density

7.85 g/cm³ (grams per cubic centimeter)
7,860 kg/m³ (kilograms per cubic meter)

The Forms We Offer

  • Flat
  • Box Section
  • Channel
  • Pipe
  • Angle
  • Round
  • Tube

Mild Steel Hollow Section Weight Chart

MS Square Hollow Section Sizes and Weight                                                  
Size (mm) 20 x 20 x 2.0 25 x 25 x 1.5 25 X 25 X 2.5 30 X 30 X 2.0 30 X 30 X 3.0 40 x 40 x 2.0 40 x 40 x 3.0 40 x 40 x 5.0 70 x 70 x 6.3 50 x 50 x 2.0 50 x 50 x 3.0 50 x 50 x 5.0 60 x 60 x 4.0 60 x 60 x 6.0 75 x 75 x 3.0 70 x 70 x 3.6 80 x 80 x 6.0 90 x 90 x 3.6 90 x 90 x 6.0 80 x 80 x 3.6 100 x 100 x 3.0 100 x 100 x 5.0 100 x 100 x 6.0 100 x 100 x 10 120 x 120 x 6.0
Weight (kg/m) 1.12 1.06 1.74 1.68 2.51 2.31 3.45 5.4 12.5 2.93 4.39 6.97 6.97 9.45 7.07 7.46 13.9 9.72 15.76 8.59 8.96 14.8 16.19 27.9 21.3
Size (mm) 20 x 20 x 2.5 25 x 25 x 2.0 25 X 25 X 3.0 30 X 30 X 2.5 40 x 40 x 1.5 40 x 40 x 2.5 40 x 40 x 4.0 50 x 50 x 1.5 70 x 70 x 8 50 x 50 x 2.5 50 x 50 x 4.0 60 x 60 x 3.0 60 x 60 x 5.0 70 x 70 x 3.0 80 x 80 x 3.0 70 x 70 x 5.0 90 x 90 x 3.0 90 x 90 x 5.0 90 x 90 x 8.0 80 x 80 x 5.0 100 x 100 x 4.0 100 x 100 x 5.0 100 x 100 x 8.0 120 x 120 x 5 120 X 120 X 6.3
Weight (kg/m) 1.35 1.43 2.04 2.14 1.81 2.92 4.46 2.28 15.3 3.71 5.72 5.34 8.54 6.28 7.22 10.11 8.01 13.3 20.4 11.7 12 14.8 22.9 18 22.3
Size (mm) 120 x 120 x 8.0 120 X 120 X 12 140 X 140 X 5.0 140 X 140 X 8 140 X 140 X 12.5 150 X 150 X 6.3 150 X 150 X 10 150 X 150 X 16 200 x 200 x 16 180 X 180 X 5 180 X 180 X 8 180 X 180 X 12.5 200 X 200 X 5 200 x 200 x 6.3 250 x 250 x 8 200 x 200 x 10 300 x 300 x 6.3 300 x 300 x 10 300 x 300 x 12.5 250 x 250 x 12.5 350 x 350 x 8 350 x 350 x 12.5 400 x 400 x 10 400 x 400 x 12.5mm
Weight (kg/m) 27.9 35.8 21.1 32.9 49.5 28.3 43.6 66.4 91.5 27.4 43 65.2 30.5 38.2 60.5 59.3 57.9 57.9 112 92.6 85.7 132 122 152
Size (mm) 120 x 120 x 10 120 X 120 X 12.5 140 X 140 X 6.3 140 X 140 X 10 150 X 150 X 5.0 150 X 150 X 8.0 150 X 150 X 12.5 150 X 150 X 16 250 x 250 x 6.3 180 X 180 X 6.3 180 X 180 X 10 180 X 180 X 16 200 X 200 X 6 200 x 200 x 8 250 x 250 x 10 200 x 200 x 12.5 300 x 300 x 8 300 x 300 x 8 300 x 300 x 16 250 x 250 x 16 350 x 350 x 10 350 x 350 x 16 400 x 400 x 12 400 x 400 x 16
Weight (kg/m) 34.2 41.6 26.3 40.4 22.7 35.4 53.4 66.4 48.1 34.2 53 81.4 35.8 48 75 73 73.1 90.7 142 117 106 167 141 192

Sizes and Weight Chart

Steel Weight Calculator

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