54SiCr6, 1.7102, 60SiCr8 - Spring manganese-chromium alloy steel for spring on heavy-duty springs.

 

Standards Steel Grades
Chemical Composition %
C: Mn: Si: P: S: Cr: Ni: Cu:
PN 60SGH
0.55 - 0.65 0.90 - 1.10 1.00 - 1.30 <0.035 <0.035 0.40 - 0.60 <0.40 <0.25
EN / DIN 60SiCr8 - 61SiCr7 - 1.7108
0.57 - 0.65 0.70 - 1.00 1.60 - 2.00 <0.025 <0.025 0.20 - 0.45 - -
AFNOR 56SiCr7 - 56 SiCr 7
0.53 - 0.59 0.60 - 0.90 1.60 - 2.00 <0.025 <0.025 0.20 - 0.45 - -
EN 67SiCr5 - 67 SiCr 5 - 1.7103 - 7103
0.62 - 0.72 0.40 - 0.60 1.20 - 1.40 <0.035 <0.035 0.20 - 0.40 - -
AFNOR 61 SC 7 - 61SC7 
0.57 - 0.64 0.60 - 0.90 1.60 - 2.00 <0.035 <0.035 0.20 - 0.45 - -
JUS C2430 - C 2430
0.55 - 0.65 0.70 - 1.00 1.50 - 1.80 <0.04 <0.04 0.20 - 0.40 - -
DIN 62SiMnCr4 - 62 SiMnCr 4 - 1.2101 - 2101
0.58 - 0.66 0.90 - 1.20 0.90 - 1.20 <0.03 <0.03 0.40 - 0.70 - -
ČSN / STN CSN 14 260 - 14260
0.50 - 0.60 0.50 - 0.80 1.30 - 1.60 <0.035 <0.035 0.50 - 0.70 <0.50 <0.30
PN 60SG
0.56 - 0.64 0.80 - 1.10 1.30 - 1.80 <0.03 <0.03 <0.30 <0.40 <0.25
EN 54SiCr6 - 54 SiCr 6 - 1.7102 - 7102
0,51 - 0.59 0.5 - 0.8 1.2 - 1.6 <0.025 <0.025 0.5 - 0.8 - -
BS EN48A - EN 48 A
0.50 - 0.60 0.60 - 0.90 1.35 - 1.65 <0.04 <0.04 0.55 - 0.85 - -
GB/T 60Si2CrA - A21603
0.56 - 0.64 0.40 - 0.70 1.40 - 1.80 <0.025 <0.025 0.70 - 1.00 <0.35 <0.25

 

Steel 60SGH - specification and application

60SGH - Steel with high hardening capacity, strength, and high ductility for springs and the heavy-duty spring elements and subject to impacts. Steel for railway engineering used in rolling stock for i.e. bumper rings of railway wagons.

60SGH can operate at temperatures up to 300 ℃. It has additional applications as steel for valve springs, torsional shafts, spring rings. 60SGH steel is non-welding grade and does not exhibit corrosion resistance, including atmospheric resistance.


Mechanical and physical properties of 60SGH steel

Mechanical and physical properties
Tensile strenght, Rm ≥ 1370 MPa
Yield point, Re ≥ 1230 MPa
Contraction, Z -
Elongation, A ≥ 7%
Hardness in the raw condition ≤ 302 HB
Hardness in softened condition ≤ 269 HB
Hardness in the hardened condition 380 - 520 HB
Density ρ  ~7,85 kg/dm³
Thermal conductivity  λ20℃ 37.3 W ⋅ m⁻¹ K⁻¹
Thermal capacity c20-100℃  511 J ⋅​ kg⁻¹ K⁻¹
Linear Expansion Factor α20-100℃ 12.0 ⋅ 10⁻⁶ K⁻¹

 


Heat treatment of 60SGH steel

Heat treatment - temperatures and processes
Slow softening annealing 640 - 680℃
Normalizing annealing in calm air 830 - 850℃
Hardening in oil 840 - 860℃
Tempering in the air or oil 450 - 510℃

 


Mechanical properties for specific temperatures

Chemical composition of the material Thermal treatment Impact resistance KM, J/cm3 (kG ⋅ m/cm2) in temperatures
+50℃ +20℃ 0℃ -20℃ -40℃ -60℃ -70℃
C: Mn: Si: Cr: Ni: Hardening in oil at 850℃ - 850℃
Tempering in oil at - 480℃
3.4 2.4 2.6 2.5 2.5 2.5 2.0
0.61 1.04 1.00 0.57 0.08 33 23 25 24 24 24 19

 


In the 60SGH grade the company provides:

 


List of equivalents and other determinations of 60SGH steel:

60SiCr8, 61SiCr7, 1.7108, 56SiCr7, 56 SiCr 7, 67SiCr5, 67 SiCr 5, 1.7103, 7103, 61 SC 7, 61SC7, C2430, C 2430, 62SiMnCr4, 62 SiMnCr 4, 1.2101, 2101, ČSN 14 260, ČSN 14260, stal 60SG, EN48A, EN 48 A, 60Si2CrA, A21603, 54SiCr6, 54 SiCr 6, 1.7102, 7102


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