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Description

France AFNOR NF EN 10028-4, NF EN 10216-4, NF EN 10222-3, NF EN 10269, 1.5680 Specialsteel Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 1.5680
Category Class Grade Standard Country Application
Steel GradesSpecialsteel 1.5680 AFNOR France Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties

Chemical composition(mass fraction)(wt.%) of the 1.5680

C Si Mn P S Cr Ni Mo V
≤0.15 ≤0.35 0.30 -0.80 ≤0.020 ≤0.010 ≤ ≥ 4.75 -5.25 ≤ ≥ ≤0.05

Mechanical Properties of steel grade 1.5680

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)
248 (≥) 634 (≥) 44 41 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 144

Physical Properties of steel grade 1.5680

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
21 - -     0.34 -  
986 853 - 22.3 211   -  
565 - 22 43.2   432 422

Heat Treatment of steel grade 1.5680

Heat treated : 1366°C - 1325°C

Technological Curves of steel grade 1.5680

Cross Reference Table (Equivalent Grade) of 1.5680

Grade Standard Country Application
X12Ni5
X12Ni5
X12Ni5

Relevant standard of 1.5680

NF EN 10028-4 Flat products made of steels for pressure purposes - Part 4: Nickel alloy steels with specified low temperature properties NF-EN-10028-4.pdf
NF EN 10216-4 Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 4: Non-alloy and alloy steel tubes with specified low temperature properties NF-EN-10216-4.pdf
NF EN 10222-3 Steel forgings for pressure purposes - Part 3: Nickel steels with specified low temperature properties NF-EN-10222-3.pdf
NF EN 10269 Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties NF-EN-10269.pdf

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