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Characteristics for grade     SM   ( SM )

      Grade :     SM   ( SM )
      Classification :   Spring structural steel
      Equivalent grades:     Is absent



Chemical composition in % for grade   SM   ( SM )
C Si Mn S P
0.36 - 0.890.07 - 0.380.24 - 1.56max   0.048max   0.048


Mechanical properties under Т=20oС for grade   SM   ( SM )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Wire Ø 0.08   2780-3100       
Wire Ø 20   1020-1150       

Types of delivery of grade   SM   ( SM )
В72 - Medium-high and high-carbon steel wire


Specification :
Mechanical properties :
sв - Tensile strength , [MPa]
sT - Yield stress, [MPa]
d5 - Specific elongation at fracture , [ % ]
y - Reduction of area , [ % ]
KCU - Impact strength , [ kJ / m2]
HB - Brinell hardness , [MPa]

Physical properties :
T - Test temperature , [Grade]
E - Young modulus , [MPa]
a - Coefficient of linear expansion (range 20o - T ) , [1/Grade]
l - Termal (heat) condition coefficient , [Watt/(m·Grade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kg·Grade)]
R - Electrical resistance , [Ohm·m]

  SM   ( SM ) - Spring structural steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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