SPRING STEELS

They are construction components which can cause elastic change of form, transforming mechanical work into potential energy and then back to mechanical work. Therefore, spring steels are used for mitigation of impact effect and as vibration component, as safety component in strong locked parts, and for springing and control order in moving parts.



    CHEMICAL COMPOSITION
Material No Symbol C Si Mn Pmax Smax Cr Mo V B(min) N(max)
1.0902 46Si7 0,42
0,50		 1,50
1,80		 0,50
0,80		 0,050 0,050 - - - - 0,007
1.0903 51Si7 0,47
0,55		 1,50
1,80		 0,50
0,80		 0,045 0,045 - - - - 0,007
1.0904 55Si7 0,52
0,60		 1,50
1,80		 0,70
1,00		 0,045 0,045 - - - - -
1.0906 65Si7 0,60
0,68		 1,50
1,80		 0,70
1,00		 0,050 0,050 - - - - 0,007
1.0908 60SiMn5 0,55
0,65		 1,00
1,30		 0,90
1,10		 0,050 0,050 - - - - 0,007
1.0961 60SiCr7 0,55
0,65		 1,50
1,80		 0,70
1,00		 0,045 0,045 0,20
0,40		 - - - 0,007
1.7103 67SiCr5 0,62
0,72		 1,20
1,40		 0,40
0,60		 0,035 0,035 0,40
0,60		 - - - -
1.7138 52MnCrB3 0,48
0,55		 0,15
0,35		 0,75
1,00		 0,035 0,035 0,40
0,60		 - - 0,0005 -
1.7176 55Cr3 0,52
0,59		 0,15
0,40		 0,70
1,00		 0,035 0,035 0,60
0,90		 - - - -
1.7701 51CrMoV4 0,48
0,56		 0,15
0,40		 0,70
1,00		 0,035 0,035 0,90
1,20		 0,15
0,25		 0,07
0,12		 - -
1.8159 50CrV4 0,47
0,55		 ≤0,40 0,70
1,00		 0,035 0,035 0,90
1,20		 - 0,10
0,20		 - -
1.8161 58CrV4 0,55
0,62		 0,15
0,40		 0,70
1,00		 0,035 0,035 0,90
1,20		 - 0,10
0,20		 - -


Material No Symbol FIELDS OF USE
1.0902 46Si7 particularly leaf, spring, helix spring, plate spring and spiral spring in general machine building
1.0903 51Si7 particularly leaf, spring, helix spring, plate spring and spiral spring in general machine building
1.0904 55Si7 Leaf springs thicker than 7mm, plate springs and dish springs
1.0906 65Si7 Vehicle leaf springs thicker than 7 mm, medium- and high-duty spiral spring, conic and helix springs
1.0908 60SiMn5 High and medium-duty vehicle leaf sprigs, plate, helix and ring springs thicker than 7 mm
1.0961 60SiCr7 Leaf springs thicker than 7mm for vehicles, helix and dish springs in general machine construction
1.7103 67SiCr5 particularly pulsed heavy duty springs, 25-40 mm revolving rod springs, valve springs, ring and dish springs
1.7138 52MnCrB3 Heavy-duty vehicle leaf springs, revolving rod and helix springs between 1270-1670 Mpa in vehicles
1.7176 55Cr3 Leaf, revolving rod and helix springs, particularly big drawing and compression springs
1.7701 51CrMoV4 heavy duty rod helix return and compression springs in vehicles
1.8159 50CrV4 Very high duty vehicle leaf springs, spiral, helix, conic springs with a wear resistance of 1370-1720 Mpa
1.8161 58CrV4 Very heavy duty big spiral, helix springs, dish springs and ring springs

MECHANICAL PARTICULARITIES AND WORKING CONDITIONS OF SPRING STEELS

    Size Duty Brinell Hardness value
BSD 30		 forging temperature hot working temperature for spring form normal annealing and cooling   normal annealing and cooling  
Material No Symbol thickness
mm		 diameter
mm		 high medium Natural hardness min soft annealing min ᵒC ᵒC ᵒC air ᵒC air
1.0902 46Si7 14 - - * 250 217 1100
850		 900
830		 850
880		 * 640
680		 *
1.0903 51Si7 17 24 - * 270 245 1050
850		 900
820		 850
880		 * 640
680		 *
1.0904 55Si7 18 - - * 290 235 1050
850		 900
830		 850
880		 * 640
680		 *
1.0906 65Si7 18 26 - * 310 240 1050
850		 900
830		 850
880		 * 640
680		 *
1.0908 60SiMn5 12 - - * 310 240 1050
850		 900
830		 850
880		 * 640
680		 *
1.0961 60SiCr7 20 40 - * 310 255 1050
850		 900
830		 850
880		 * 640
680		 *
1.7103 67SiCr5 20 40 * - 310 240 1050
850		 900
820		 850
880		 * 640
680		 *
1.7138 52MnCrB3 20 40 * - 320 230 1050
850		 900
820		 850
880		 * 640
680		 *
1.7176 55Cr3 20 40 * - 310 248 1050
850		 900
800		 850
880		 * 640
680		 *
1.7701 51CrMoV4 40 60 * - 310 255 1050
850		 920
830		 850
880		 * 640
680		 *
1.8159 50CrV4 25 40 * - 310 241 1050
850		 920
820		 850
880		 * 640
680		 *
1.8161 58CrV4 25 40 * - 330 235 1050
850		 920
830		 850
880		 * 640
680		 *

HEAT TREATMENT CONDITIONS AND MECHANICAL PARTICULARITIES OF SPRING STEELS

    Heat Treatment Conditions and Mechanical Particularities
    Hardening with shock cooling temper and cooling environment Re yielding point Re tensile strength A elongation (min) Z contraction (min) DVM notch pulse resistance
   
Material No Symbol ᵒC Water Oil ᵒC air Mpa(min) Mpa % % J
1.0902 46Si7 830
860		 * - 430
500		 * 1080 1270
1470		 6 30 21
1.0903 51Si7 820
850		 * - 350
550		 * 1130 1320
1570		 6 25 14
1.0904 55Si7 830
860		 (*) * 430
500		 * 1080 1470
1670		 6 25 14
1.0906 65Si7 830
860		 - * 430
500		 * 1080 1370
1570		 6 25 14
1.0908 60SiMn5 830
860		 - * 400
550		 * 1030 1320
1520		 6 25 14
1.0961 60SiCr7 830
860		 - * 350
550		 * 1130 1320
1570		 6 30 21
1.7103 67SiCr5 830
860		 - * 430
500		 * 1325 1470
1670		 6 20 14
1.7138 52MnCrB3 830
860		 - * 350
550		 * 1175 1320
1720		 6 40 -
1.7176 55Cr3 830
860		 - * 350
550		 * 1175 1320
1720		 6 30 -
1.7701 51CrMoV4 830
860		 - * 350
550		 * 1175 1370
1670		 6 - -
1.8159 50CrV4 830
860		 - * 350
550		 * 1175 1370
1620		 6 40 21
1.8161 58CrV4 830
850		 - * 350
550		 * 1325 1370
1670		 6 35 14


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