Structural Steels
  
 
 
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Structural Steels are used in many applications, combining good welding properties with guaranteed strengths. There are many grades and the uses varied including civil and industrial engineering. High strength low alloys have replaced many structural steels where weight reduction is important (e.g. automotive) but with guaranteed strengths.

 

Traditional Structural Steels

Euronorm

Germany

UK

USA

France

               

EN10025

Din 17100

BS4360

ASTM

NFA 35-501

%C

%Mn

%Si

%S

%P

Yield min Tensile  

S185

St33

A283B

A33

S235

40A

A283C

0.22max

1.60 max

0.50 max

.050 max

.050 max

185

310/540

S235JR

St37-2

40B

A283C-A

0.17max

1.40max

-

0.045

0.045

235

360/510

S235JO

St37-3 U

40C

E 24-2

0.17max

1.40max

-

0.040

0.040

235

360/510

S235J2G3

St37-3 N

40D

E24-4

0.17max

1.40max

-

0.035

0.035

235

360/510

S275

43A

0.25max

1.60 max

0.50 max

.050 max

.050 max

275

430/580

S275JR

St44-2

43B

A283D-A

0.21max

1.50max

-

0.045max

0.045max

275

430/580

S275JO

St44-3 U 43C

A578Gr70

E28-3

0.18max

1.50max

-

0.040max

0.040max

275

430/580

S355

50A

A572Gr50

0.23max

1.60max

0.50max

0.050max

0.050max

355

490/630

S355JR

50B

-

0.23max

1.60max

0.55max

0.045max

0.045max

355

490/630

S355JO

St52-3 U

50C

A441

0.22max

1.60 max

0.60 max

0.40 max

0.040 max

355

490/630

S355J2G3

St 52-3 N 50D

0.20max

1.60max

0.55max

0.035max

0.035max

355

490/630

S355J2G4

0.20max

1.60max

0.55max

0.035max

0.035max

355

490/630

High Strength Low Alloy Steels

Euronorm

Germany

UK

USA

France

EN 10149-2

SEW 092

BS1449

NFA 36-231

%C

%Mn

%Si

%S

%P

Yield min Tensile V

S315MC

QSTE340TM 40/30 045XLF E315D

0.12max

1.30max

0.50max

0.020max

0.025max

315 390/510

0.20max

S355MC

QSTE380TM 43/35 050XLF E355D 0.12max 1.50max

0.50max

0.020max

0.025max

355 430/550

0.20max

S420MC

QSTE420TM 46/40 060XLF E420D 0.12max 1.60max

0.50max

0.015max

0.025max

420 480/620

0.20max

S460MC

QSTE460TM 50/45 - - 0.12max 1.60max

0.50max

0.015max

0.025max

460 520/670

0.20max

S315MC

-

40F30 - E315D 0.12max 1.30max

0.50max

0.015max

0.025max

315

0.20max

S355MC

-

40F35 - E355D 0.12max 1.50max

0.50max

0.015max

0.025max

355

0.20max

-

-

46F40 - - 0.12max 1.50max

0.50max

0.015max

0.025max

355

0.20max

S420MC

QSTE420TM - - E420D 0.12max 1.60max

0.50max

0.015max

0.025max

420

0.20max

S460MC

QSTE460TM - Gr65 - 0.12max 1.60max

0.50max

0.015max

0.025max

460

0.20max

S500MC

QSTE500TM E490D 070XLK - 0.12max 1.70max

0.50max

0.015max

0.025max

500 550/700

0.20max

S550MC

QSTE550TM

-

080XLK - 0.12max 1.80max

0.50max

0.015max

0.025max

550 600/760

0.20max

Links to Branded High strength Low Alloy grades:-
Docol SSAB of Sweden Tenform from Corus

Comparison of BS EN 10025 and BS 4360 Mechanical Properties

 

BS EN 10025: 1993 BS4360: 1986
        Impact Energy (JC)         Impact Energy (JC)
        Nominal Thickness         Nominal Thickness
Grade Tensile Strength Min Yield Strength at 16mm N/mm Max Thk for Specified Yield N/mm Temp C <150mm >150mm Grade Tensile Strength >3mm Min Yield Strength at 16mm Max Thk for Specified Yield N/mm (2) Temp C <100mm
-1 <250mm N/mm N/mm -3
  -1      
S185 (4) 290/510 185 25 - - - - - - - - -
S235 (5) 340/470 235 250 - - - 40A 340/500 235 150 - -
S235JR (4) 340/470 235 25 20 27 - - - - - - -
S235JRG1 (4) 340/470 235 25 +20 (6) 27 - - - - - - -
S235JRG2 340/470 235 250 +20 (6) 27 23 40B 340/500 235 150 +20 (6) 27
S235JO 340/470 235 250 0 27 23 40C 340/500 235 150 0 27
S235J2G3 340/470 235 250 -20 27 23 40D 340/500 235 150 -20 27
S235J2G4 340/470 235 250 -20 27 23 40D 340/500 235 150 -20 27
S275 (5) 410/560 275 250 - - - 43A 430/580 275 150 - -
S275JR 410/560 275 250 +20 (6) 27 23 43B 430/580 275 150 +20 (6) 27
S275JO 410/560 275 250 0 27 23 43C 430/580 275 150 0 27
S275J2G3 410/560 275 250 -20 27 23 43D 430/580 275 150 -20 27
S275J2G4 410/560 275 250 -20 27 23 43D 430/580 275 150 -20 27
S355 (5) 490/630 355 250 - - - 50A 490/640 355 150 - -
S355JR 490/630 355 250 +20 (6) 27 23 50B 490/640 355 150 +20 (6) 27
S355JO 490/630 355 250 0 27 23 50C 490/640 355 150 0 27
S355J2G3 490/630 355 250 -20 27 23 50D 490/640 355 150 -20 27
S355J2G4 490/630 355 250 -20 27 23 50D 490/640 355 150 -20 27
S355K2G3 490/630 355 250 -20 40 33 50DD 490/640 355 150 -30 27
S355K2G4 490/630 355 250 -20 40 33 50DD 490/640 355 150 -30 27
E295 470/610 295 250 - - - - - - - - -
E335 570/710 335 250 - - - - - - - - -
E360 670/830 350 250 - - - - - - - - -

 

Steel Specifications

Standard Specific Links

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Micro-Alloyed Steels

A micro-alloyed steel can be defined as a carbon-manganese steel containing deliberately added alloying elements totalling only 0.05 to 0.10%. Alloying elements which are effective in modifying steel properties when present in such small amounts include boron, vanadium and niobium and boron in even lesser amounts (0.005% /0.003%).

Micro-alloyed steels are manufactured in Large tonnages for high pressure pipelines in the petroleum industry and automotive forgings.

A major advantage of these steels is that in the case of forgings, careful control of forge processing temperatures can eliminate subsequent heat treatment. This is a major cost advantage particularly with certain automotive components. Mechanical properties developed by controlled hot working conditions are similar to those developed by conventional hardening and tempering treatments for components where strength and toughness are required

see HSLA steels

 


Disclaimer

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.