A20    
  High Strength Low Alloy steels   Last update: 2011-4-5

A significant weight reduction can be achieved by using High Strength Low Alloy steels.

The lighter the trailer, the heavier the payload that can be transported.

 

Properties
   

High Strength Low Alloy (HSLA) steels are characterised by high ductility, controlled internal purity, fine grain structure and a low carbon content.

 

Advantages
   

HSLA steels combine:

  • Outstanding mechanical properties
    • High strength
    • Toughness
    • Fatigue resistance
  • Good formability
  • Good weldability

With their high tensile strength, they are an excellent choice when weight-saving is a priority and are frequently used to replace structural steels.

 

Applications
   

HSLA steels are used in a wide range of applications in transport (earth movers, trailers, agricultural and railroad machinery etc), profiling (racks etc) and building (cranes, safety barriers, light poles etc). Significant weight reductions can be achieved by using HSLA, especially for cranes and heavy vehicle trailers, thus allowing a larger payload.

 

Brand correspondence
   
 EN 10149-2:1995SEW 092:1990UNE 36090NF A 36-231:1992BS 1449/1ASTM A1011-01aOld brand names
S240MC AM FCE       
S280MC AM FCE QstE300TMAE275HC HR40 F30 Soldur 280/Profilar 300/BSK 30
S315MC EN 10149-2S315MC      
S315MC AM FCES315MCQstE340TM E315D HSLAS-F Grade 45 class 2Soldur 320/Profilar 340/BSK 34/SPXE 340
S355MC EN 10149-2S355MC      
S355MC AM FCES355MCQstE380TMAE340HCE355DHR43 F35HSLAS-F Grade 50 class 2Soldur 360/Profilar 380/BSK 38/SPXE 380
S390MC AM FCE QstE420TMAE390HC HR46 F40 Profilar 420/BSK 42/SPXE 420
S420MC EN 10149-2S420MC      
S420MC AM FCES420MCQstE460TMAE440HCE420DHR50 F45HSLAS-F Grade 60 class 2Soldur 420/Profilar 460/BSK 46
S460MC EN 10149-2S460MC      
S460MC AM FCES460MCQstE500TMAE490HC  HSLAS-F Grade 65 class 2Soldur 460/Profilar 500/BSK 50/SPXE 480
S500MC EN 10149-2S500MC      
S500MC AM FCES500MCQstE550TM E490D HSLAS-F Grade 70 class 2Soldur 500/Profilar 550/BSK 55/SPXE 530
S550MC EN 10149-2S550MC      
S550MC AM FCES550MCQstE600TM E560DHR60 F55HSLAS-F Grade 80 class 2Soldur 550
Grades in italics: not included in the standard


 

Dimensions
    Mill finish
Thickness (mm)Min widthS240MC AM FCES280MC AM FCES315MC EN 10149-2, S315MC AM FCES355MC EN 10149-2, S355MC AM FCES390MC AM FCES420MC EN 10149-2, S420MC AM FCES460MC EN 10149-2, S460MC AM FCES500MC EN 10149-2, S500MC AM FCES550MC EN 10149-2, S550MC AM FCE
Max widthMax widthMax widthMax widthMax widthMax widthMax widthMax widthMax width
1.50 ≤ th < 1.6080015601540130011801180----
1.60 ≤ th < 1.70
1.70 ≤ th < 1.8016201590143012501250
1.80 ≤ th < 1.9016301300127010201020
1.90 ≤ th < 2.0016501780154014001400112010501120940
2.00 ≤ th < 2.20170018301600145014501260126012501180
2.20 ≤ th < 2.401470132013101320
2.40 ≤ th < 2.60179019301680155015501380136013801310
2.60 ≤ th < 2.8019801750170017001450141014501400
2.80 ≤ th < 3.00203018201520150015201450
3.00 ≤ th < 3.30193017901590158015701580
3.30 ≤ th < 3.50213020301700170016501630
3.50 ≤ th < 4.002130188017501780178017401740
4.00 ≤ th < 4.50204020402040202020002000
4.50 ≤ th < 6.5021502150215021502150
6.50 ≤ th < 9.5018702130
9.50 ≤ th < 10.001980
10.00 ≤ th < 12.001570170021301570
12.00 ≤ th < 13.0015702130
13.00 ≤ th < 14.001570
14.00 ≤ th < 15.0013701370
15.00 ≤ th < 16.001370137013701740174013701370

Pickled
Thickness (mm)Min widthS240MC AM FCES280MC AM FCES315MC EN 10149-2, S315MC AM FCES355MC EN 10149-2, S355MC AM FCES390MC AM FCES420MC EN 10149-2, S420MC AM FCES460MC EN 10149-2, S460MC AM FCES500MC EN 10149-2, S500MC AM FCES550MC EN 10149-2, S550MC AM FCE
Max widthMax widthMax widthMax widthMax widthMax widthMax widthMax widthMax width
1.50 ≤ th < 1.6080015301540142012501060----
1.60 ≤ th < 1.70157014501090
1.70 ≤ th < 1.8016101590147012901130
1.80 ≤ th < 1.90163016301500138012001030103010301030
1.90 ≤ th < 2.00165017801620144012801120107011201090
2.00 ≤ th < 2.1016701830146014501260128012801240
2.10 ≤ th < 2.20163015201320131013101260
2.20 ≤ th < 2.30164015401470134013401290
2.30 ≤ th < 2.4019301670157015201360137013701320
2.40 ≤ th < 2.5016101570140014001350
2.50 ≤ th < 2.6019801730165016101420143014301400
2.60 ≤ th < 2.7016701640146014601450
2.70 ≤ th < 2.8020301480149014901460
2.80 ≤ th < 2.901530152015301530
2.90 ≤ th < 3.001650158015501550
3.00 ≤ th < 3.1018801730163015801580
3.10 ≤ th < 3.201670162016001560
3.20 ≤ th < 3.30166016201590
3.30 ≤ th < 3.40213017401700170017001630
3.40 ≤ th < 3.5017401740174016801680
3.50 ≤ th < 3.602130188017801780178017401740
3.60 ≤ th < 3.7018001800180017901790
3.70 ≤ th < 3.8018601860186018401840
3.80 ≤ th < 3.90192019201920192018901890
3.90 ≤ th < 4.00198019801980198019401940
4.00 ≤ th < 4.10204020402040200020002000
4.10 ≤ th < 5.00207020702070205020502050
5.00 ≤ th < 6.00213021302130213020702070
6.00 ≤ th < 6.101660
6.10 ≤ th < 6.201640207020702070
6.20 ≤ th < 6.301610
6.30 ≤ th < 6.40159015901580158015801580
6.40 ≤ th < 6.5015601560156015501390-
6.50 ≤ th < 7.001520-15501550
7.00 ≤ th < 7.1012901550
7.10 ≤ th < 7.90152015201280
7.90 ≤ th < 8.00
8.00 ≤ th < 8.10-1520
8.10 ≤ th < 10.00-
10.00 ≤ th < 13.00---



 

Mechanical properties
   
 
Direction
Thickness (mm)
Re (MPa)
Rm (MPa)
A80 (%)
A 5.65√So (%)
Bending ratio (th)
KV -20°C (J)
S240MC AM FCEL< 3240 - 320360 - 450≥ 27---
3 - 6.6350 - 440-≥ 32
6.6 - 16340 - 440-
T< 16----0-
S280MC AM FCEL< 3280 - 350370 - 450≥ 26---
3 - 16-≥ 30
T< 3300 - 380370 - 450≥ 25-0-
3 - 16-≥ 29
S315MC EN 10149-2L1.5 - 3≥ 315390 - 510≥ 20---
3 - 20-≥ 24
T1.5 - 20----0-
S315MC AM FCEL< 3315 - 395415 - 495≥ 24---
3 - 6-≥ 28
6 - 16≥ 40
T< 3340 - 420420 - 500≥ 23-0-
3 - 16-≥ 27
S355MC EN 10149-2L1.5 - 3≥ 355430 - 550≥ 19---
3 - 20-≥ 23
T1.5 - 20----≥ 0.5-
S355MC AM FCEL< 3355 - 435430 - 520≥ 22---
3 - 6-≥ 25
6 - 16≥ 40
T< 3380 - 460440 - 530≥ 21-0-
3 - 16-≥ 24
S390MC AM FCEL< 3390 - 480460 - 560≥ 20---
3 - 6-≥ 24
6 - 16≥ 40
T< 3420 - 500470 - 570≥ 19-0-
3 - 16-≥ 23
S420MC EN 10149-2L1.5 - 3≥ 420480 - 620≥ 16---
3 - 20-≥ 19
T1.5 - 20----≥ 0.5-
S420MC AM FCEL< 3420 - 520490 - 600≥ 18---
3 - 6-≥ 22
6 - 16≥ 40
T< 3450 - 550500 - 600≥ 17-≥ 0.2-
3 - 13-≥ 21
13 - 16≥ 0.5
S460MC EN 10149-2L1.5 - 3≥ 460520 - 670≥ 14---
3 - 20-≥ 17
T1.5 - 20----≥ 1-
S460MC AM FCEL< 3460 - 560520 - 640≥ 15---
3 - 6-≥ 18
6 - 16≥ 40
T< 3490 - 590530 - 640≥ 14-≥ 0.6-
3 - 6-≥ 17
6 - 16≥ 1
S500MC EN 10149-2L1.5 - 3≥ 500550 - 700≥ 12---
3 - 16-≥ 14
16 - 20-
T1.5 - 16----≥ 1-
S500MC AM FCEL< 2500 - 600560 - 700≥ 15---
2 - 3≥ 16
3 - 6-≥ 19
6 - 16≥ 40
T< 2530 - 630570 - 700≥ 14-≥ 0.6-
2 - 3≥ 15
3 - 6-≥ 18
6 - 16≥ 1
S550MC EN 10149-2L1.5 - 3≥ 550600 - 760≥ 12---
3 - 16-≥ 14
16 - 20-
T1.5 - 16----≥ 1.5-
S550MC AM FCEL< 3550 - 650620 - 750≥ 12---
3 - 6-≥ 14
6 - 16≥ 40
T< 3580 - 680630 - 750≥ 11-≥ 0.8-
3 - 6-≥ 13
6 - 16≥ 1.5
Grades in italics: not included in the standard
Values in bold: tighter than the standard

For AM FCE grades, the choice of direction for the mechanical properties should be specified when ordering.



 

Chemical composition
   
 
C (%)
Mn (%)
P (%)
S (%)
Si (%)
Al (%)
Nb (%)
V (%)
Ti (%)
Ceq (%)
Galvanisation
S240MC AM FCE ≤ 0.100 ≤ 0.80 ≤ 0.025 ≤ 0.020 ≤ 0.03 ≥ 0.015 ≤ 0.025 ≤ 0.200 ≤ 0.150 ≤ 0.18 Class 1
S280MC AM FCE ≤ 0.080 ≤ 0.80 ≤ 0.025 ≤ 0.015 ≤ 0.03 ≥ 0.015 ≤ 0.025 ≤ 0.200 ≤ 0.150 ≤ 0.23 Class 1
S315MC EN 10149-2 ≤ 0.120 ≤ 1.30 ≤ 0.025 ≤ 0.020 ≤ 0.50 ≥ 0.015 ≤ 0.090 ≤ 0.200 ≤ 0.150 - No
S315MC AM FCE 0.100 0.70 ≤ 0.025 0.015 0.03 ≥ 0.015 0.045 ≤ 0.200 ≤ 0.150 ≤ 0.25 Class 1
S355MC EN 10149-2 ≤ 0.120 ≤ 1.50 ≤ 0.025 ≤ 0.020 ≤ 0.50 ≥ 0.015 ≤ 0.090 ≤ 0.200 ≤ 0.015 - No
S355MC AM FCE 0.100 1.40 ≤ 0.025 0.015 0.03 ≥ 0.015 0.065 ≤ 0.200 ≤ 0.150 ≤ 0.32 Class 1
S390MC AM FCE ≤ 0.100 ≤ 1.50 ≤ 0.025 ≤ 0.012 ≤ 0.03 ≥ 0.015 ≤ 0.065 ≤ 0.200 ≤ 0.150 ≤ 0.36 Class 1
S420MC EN 10149-2 ≤ 0.120 ≤ 1.60 ≤ 0.025 ≤ 0.015 ≤ 0.50 ≥ 0.015 ≤ 0.090 ≤ 0.200 ≤ 0.150 - No
S420MC AM FCE 0.110 1.50 ≤ 0.025 0.012 0.03 ≥ 0.015 0.065 ≤ 0.200 0.050 ≤ 0.38 Class 1
S460MC EN 10149-2 ≤ 0.120 ≤ 1.60 ≤ 0.025 ≤ 0.015 ≤ 0.50 ≥ 0.015 ≤ 0.090 ≤ 0.200 ≤ 0.150 - No
S460MC AM FCE ≤ 0.120 1.50 ≤ 0.025 0.012 0.03 ≥ 0.015 0.080 ≤ 0.200 0.060 ≤ 0.40 Class 1
S500MC EN 10149-2 ≤ 0.120 ≤ 1.70 ≤ 0.025 ≤ 0.015 ≤ 0.50 ≥ 0.015 ≤ 0.090 ≤ 0.020 ≤ 0.150 - No
S500MC AM FCE ≤ 0.120 ≤ 1.70 ≤ 0.025 0.012 0.03 ≥ 0.015 ≤ 0.090 ≤ 0.200 0.100 ≤ 0.42 Class 1
S550MC EN 10149-2 ≤ 0.120 ≤ 1.80 ≤ 0.025 ≤ 0.015 ≤ 0.05 ≥ 0.015 ≤ 0.090 ≤ 0.020 ≤ 0.150 - No
S550MC AM FCE 0.100 ≤ 1.70 ≤ 0.025 0.012 0.03 ≥ 0.015 ≤ 0.090 ≤ 0.200 0.100 ≤ 0.44 Class 1
Grades in italics: not included in the standard
Values in bold: tighter than the standard

The chemical properties given are based on cast analysis data.

V+Nb+Ti ≤ 0.22%



   
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All details provided in the ArcelorMittal Flat Carbon Europe S.A. catalogue are for information purposes only. ArcelorMittal Flat Carbon Europe S.A. reserves the right to change its product range at any time without prior notice.