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21-4N

Favorite Datasheet
SA-299 Grade B 21-4N + Nb + W
#214

Description

USA UNS SAE J 775 (2004), 21-4N Specialsteel Engine poppet valve information report and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 21-4N
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel 21-4N Precipitation-Hardening UNS USA Engine poppet valve information report

Chemical composition(mass fraction)(wt.%) of the 21-4N

C Si Mn P S Ni Cr Al Cu Ti Fe N Mo B Zr
≤0.05 ≤0.20 ≤0.50 ≤ ≥ ≤ ≥ ≤remaining 15.00 -17.00 4.00 -5.00 ≤ ≥ ≤0.50 2.00 -4.00 ≤ ≥ ≤0.50 ≤0.006 ≤0.05

Mechanical Properties of steel grade 21-4N

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)
187 (≥) 895 (≥) 12 31 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical Properties of steel grade 21-4N

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
13 - -     0.42 -  
538 453 - 12.3 234   -  
329 - 21 33.2   444 113

Heat Treatment of steel grade 21-4N

Heat treated : 1223°C - 1627°C

Technological Curves of steel grade 21-4N

Cross Reference Table (Equivalent Grade) of 21-4N

Grade Standard Country Application
S21400
S21460
214
214
S21400
S21400
UNS G12144
UNS G12144
UNS W21418
UNS W74214
UNS K21451
UNS K21450
UNS K21485
UNS W82141
SS14:2140
SS14:2140
SS14:2140

Relevant standard of 21-4N

SAE J 775 (2004) Engine poppet valve information report SAE-J-775-(2004).pdf
SA-299 Grade B 21-4N + Nb + W
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Jiangyou Longhai Special Steel Co.,Ltd.
Jiangyou Longhai Special Steel Co.,Ltd.

Our main peoducts of steel are many kinds of special steel, like tool steel, mould steel, alloy steel, alloy constructural steel, heat-resistant steel, high speed tool steel,spring steel and bearing steel , stainless steel and so on, which have formed 12 series and more than 350 varieties with n...

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