1.4438

1.4438 Stainless Steels to NF EN 10028-7

1.4438 - Specification & Application

  • NF EN 10028-7 - Flat products made of steels for pressure purposes - Part 7: Stainless steels
  • NF EN 10088-1 - Stainless steels - Part 1: List of stainless steels
  • 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 10088-3 - 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 10088-4 - Stainless steels - Part 4: Technical delivery conditions for sheet/plate and strip of corrosion resisting steels for construction purposes
  • 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 10217-7 - Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless steel tubes
  • NF EN 10253-3 - Butt-welding pipe fittings - Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements
  • NF EN 10253-4 - Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements

Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements

Chemical composition(wt.%) of 1.4438 grade: to NF EN 10028-7

Elements Min.（≥） Max.（≤） Similar Remarks
C - 0.030
Si - 1.00
Mn - 2.00
P - 0.045
S - 0.015
Cr 17.50 19.50
Mo 3.00 4.00
Ni 13.00 16.00
N - 0.11

1.4438 - Detail

Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex) stainless steels with specific inspection requirements

Mechanical properties of grade 1.4438 NF EN 10028-7

Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
485 (≥) 774 (≥) 44 43 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 441

Physical properties of grade 1.4438 NF EN 10028-7

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
727 (≥) 752 (≥) 12 21 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 442
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
769 429 663

Equivalent Grade

1 X2CrNiMo18-15-4 2 EN X2CrNiMo18-15-4 3 EN X2CrNiMo18-15-4 4 EN X2CrNiMo18-15-4 5 X2CrNiMo18-15-4 6 1.4438

Equivalent Products

Product shapes we supply:

We can customize the production of 1.4438 grade, contact us for the best solution.
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