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Description

UK 1.4438 austenitic special steel and 1.4438 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Steel: 1.4438
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Steel 1.4438 UK austenitic special steel
X2CrNiM0Nl7-13-5
1.4567
X3CrNiCul8-9-4
X1NiCrM0Cu25-20-5
1.4539
X6CrNiNbl8-10
1.4550
X6CrNiM0Nbl7-12-2
1.4580
X2CrNiM0l8-15-4

Chemical composition(mass fraction)(wt.%) of the 1.4438

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Mo(%) N(%)
Max 0.030 Max 1.00 Max 2.00 Max 0.045 Max 0.015 17.5-19.5 13.0-16.0 3.00-4.00 Max 0.11

Mechanical Properties of steel grade 1.4438

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)
237 (≥) 569 (≥) 31 33 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade 1.4438

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 - -     0.32 -  
434 243 - 21.3 221   -  
424 - 14 21.2   121 214

Heat Treatment of steel grade 1.4438

Heat treated : 1417°C - 1814°C

Technological Curves of steel grade 1.4438

Cross Reference Table (Equivalent Grade) of 1.4438

Grade Standard Country Application
1.4438 UK austenitic special steel
1.4438(AFNOR) AFNOR France Austenite

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