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Description

France AFNOR NF EN 10028-7, NF EN 10088-1, NF EN 10088-2, NF EN 10088-3, NF EN 10088-4, NF EN 10088-5, NF EN 10217-7, NF EN 10253-3, NF EN 10253-4, 1.4438 Specialsteel Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: 1.4438
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel 1.4438 Austenite AFNOR France Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements

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

C Si Mn P S Cr Mo Ni N
≤0.030 ≤1.00 ≤2.00 ≤0.045 ≤0.015 17.50 -19.50 3.00 -4.00 13.00 -16.00 ≤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)
434 (≥) 816 (≥) 34 13 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 211

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
11 - -     0.41 -  
641 777 - 34.3 132   -  
431 - 33 31.2   414 244

Heat Treatment of steel grade 1.4438

Heat treated : 1238°C - 1552°C

Technological Curves of steel grade 1.4438

Cross Reference Table (Equivalent Grade) of 1.4438

Grade Standard Country Application
X2CrNiMo18-15-4
X2CrNiMo18-15-4
X2CrNiMo18-15-4

Relevant standard of 1.4438

NF EN 10028-7 Flat products made of steels for pressure purposes - Part 7: Stainless steels NF-EN-10028-7.pdf
NF EN 10088-1 Stainless steels - Part 1: List of stainless steels NF-EN-10088-1.pdf
NF EN 10088-2 Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for general purposes NF-EN-10088-2.pdf
NF EN 10088-3 Stainless steels - Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposes NF-EN-10088-3.pdf
NF EN 10088-4 Stainless steels - Part 4: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes NF-EN-10088-4.pdf
NF EN 10088-5 Stainless steels - Part 5: Technical delivery conditions for bars, rods, wire, sections and bright products of corrosion resisting steels for construction purposes NF-EN-10088-5.pdf
NF EN 10217-7 Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes NF-EN-10217-7.pdf
NF EN 10253-3 Butt-welding pipe fittings - Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements NF-EN-10253-3.pdf
NF EN 10253-4 Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements NF-EN-10253-4.pdf

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