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+90 232 877 17 29
+90 232 877 17 39

Halilbeyli OSB Mah. Nif Cad. No:20
Kemalpaşa / İzmir, Türkiye

info@macbrightsteel.com.tr www.macbrightsteel.com.tr

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Spring Steels

Technical Features of Spring Steels
Spring steels are required to undergo a high amount of elastic deformation, to have high yield strength and to have a long-life  
expectancy. Spring steels contain medium or high levels of carbon (0.50-0.85%). They are generally produced as low alloyed or non-alloyed.
 
 
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Simax. Mn Pmax. Smax. Cr Mo V
51CrV4 0,47 – 0,55 0,40 0,70 – 1,10 0,030 0,030 0,90 – 1,20 – 0,10 – 0,25
55Cr3 0,52 – 0,59 0,40 0,70 – 1,00 0,030 0,030 0,70 – 1,00 – –
38Si7 0,35 – 0,42 1,50 – 1,80 0,50 – 0,80 0,030 0,030 – – –
* Cu + ( 10 x Sn ) ≤ 0,60
2. TECHNICAL DELIVERY CONDITIONS
ISO 683-14: 2008 Heat Treatment Steels. Technical Delivery Conditions. Hot Rolled Reclaimable Springs.
3. AREAS OF USE
They are used in spring parts in the automotive sector and industry.
55CrV4 Spring Steel Technical Features According to ISO 683-14
Spring steels are required to undergo a high amount of elastic deformation, to have high yield strength and to have a long-life  
expectancy. Spring steels contain medium or high levels of carbon (0.50-0.85%). They are generally produced as low alloyed or non-alloyed.
 
 
Material Name: Material No: Equivalent Qualities:
51CrV4 1.8159 SAE 6150
DIN 50CrV4
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Simax. Mn Pmax. Smax. Cr Mo V
51CrV4 0,47 – 0,55 0,40 0,70 – 1,10 0,030 0,030 0,90 – 1,20 – 0,10 – 0,25
* Cu + ( 10 x Sn ) ≤ 0,60
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): max. 280 HB
Soft Annealing (+A): max. 248 HB
Spheroidized Annealing (+AC): max. 230 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
51CrV4 +H max. 65 65 64 64 63
min. 57 56 55 54 53
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
51CrV4 +H max. 62 62 61 60 58
min. 52 50 48 44 41
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
51CrV4 +H max. 57 55 54 53 53
min. 37 35 34 33 32
3. TECHNICAL DELIVERY CONDITIONS
ISO 683-14: 2008 Heat Treatment Steels. Technical Delivery Conditions. Hot Rolled Reclaimable Springs.
4. AREAS OF USE
They are used in spring parts in the automotive sector and industry.
55Cr3 Spring Steel Technical Features According to ISO 683-14
Spring steels are required to undergo a high amount of elastic deformation, to have high yield strength and to have a long-life  
expectancy. Spring steels contain medium or high levels of carbon (0.50-0.85%). They are generally produced as low alloyed or non-alloyed.
 
 
Material Name: Material No: Equivalent Qualities:
55Cr3 1.7176
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Simax. Mn Pmax. Smax. Cr Mo V
55Cr3 0,52 – 0,59 0,40 0,70 – 1,00 0,030 0,030 0,70 – 1,00 – –
* Cu + ( 10 x Sn ) ≤ 0,60
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): max. 280 HB
Soft Annealing (+A): max. 248 HB
Spheroidized Annealing (+AC): max. 230 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
55Cr3 +H max. 65 65 64 63 63
min. 57 56 55 54 52
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
55Cr3 +H max. 62 61 60 57 52
min. 48 43 39 33 30
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
55Cr3 +H max. 48 45 42 40 39
min. 28 27 26 25 24
3. TECHNICAL DELIVERY CONDITIONS
ISO 683-14: 2008 Heat Treatment Steels. Technical Delivery Conditions. Hot Rolled Reclaimable Springs.
4. AREAS OF USE
They are used in spring parts in the automotive sector and industry.
38Si7 Spring Steel Technical Features According to ISO 683-14
Spring steels are required to undergo a high amount of elastic deformation, to have high yield strength and to have a long-life  
expectancy. Spring steels contain medium or high levels of carbon (0.50-0.85%). They are generally produced as low alloyed or non-alloyed.
 
 
Material Name: Material No: Equivalent Qualities:
38Si7 1.5023
1. CHEMICAL COMPOSITION
Chemical Composition % by Mass
Quality C Si Mn Pmax. Smax. Cr Mo V
38Si7 0,35 – 0,42 1,50 – 1,80 0,50 – 0,80 0,030 0,030 – – –
* Cu + ( 10 x Sn ) ≤ 0,60
2. MECHANICAL FEATURES
Cold Cutability Annealing (+S): max. 280 HB
Soft Annealing (+A): max. 217 HB
Spheroidized Annealing (+AC): max. 200 HB
Rockwell Class C Hardness Limit Values for Special Steel Qualities with Normal Hardenability Requirements 
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
1,5 3 5 7 9
38Si7 +H max. 61 58 51 44 40
min. 54 48 38 31 27
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
11 13 15 20 25
38Si7 +H max. 37 34 32 29 27
min. 24 21 19 – –
  Symbol Range Limits Distance in mm from the Quenched End
HRC Class Hardness
30 35 40 45 50
38Si7 +H max. 26 25 25 25 24
min. – – – – –
3. TECHNICAL DELIVERY CONDITIONS
ISO 683-14: 2008 Heat Treatment Steels. Technical Delivery Conditions. Hot Rolled Reclaimable Springs.
4. AREAS OF USE
They are used in spring parts in the automotive sector and industry.

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MAC BRIGHT STEEL

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  • +90 232 877 17 29
  • info@macbrightsteel.com.tr
  • Bağyurdu Halilbeyli Organized Industrial Zone District, Nif Street, No:20 Kemalpaşa / İzmir, Turkey
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