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68A

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Russia GOST 68A Heat-treated steel spring wire. Specifications and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 68A / 68A
Category Grade Standard Region/Area Standard Content
Metals 68A GOST 1071 Russia Heat-treated steel spring wire. Specifications

Chemical composition(mass fraction)(wt.%) of the 68A

Element Min Max Similar
Si 0.1500 0.2500 -
S - 0.0250 -
P - 0.0250 -
Ni - 0.2000 -
Mn 0.4000 0.5500 -
Cu - 0.1500 -
Cr - 0.1200 -
C 0.6500 0.7000 -
Al - 0.0500 -

Mechanical Properties of steel grade 68A

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
172 (≥) 411 (≥) 12 21 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical Properties of steel grade 68A

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
43 - -     0.42 -  
317 873 - 12.3 442   -  
137 - 11 32.2   323 144

Heat Treatment of steel grade 68A

Heat treated : 1816°C - 1689°C

Technological Curves of steel grade 68A

Cross Reference Table (Equivalent Grade) of 68A

Grade Standard Country Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1
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