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X12Ni5 Material EN 10222-3 Standard 1.5680 Steel Number Welding Neck Flange WN Flange

Product Summary
X12Ni5 welding neck flanges (1.5680) offer excellent low-temperature impact resistance, with mechanical properties certified to EN 10222-3 standards. These forged wn flanges provide superior durability and performance in demanding pressure applications.

Product Details

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X12Ni5 welding neck flanges

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EN 10222-3 forged wn flanges

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1.5680 forged welding neck flanges

Material: X12Ni5
Standard: EN1092-1 Type 01
Steel Number: 1.5680
Type: Wn Flanges
Product Description
X12Ni5 Welding Neck Flanges - EN 10222-3 Forged WN Flanges - 1.5680 Forged WN Flanges
Product Specifications
Grade: X12Ni5
Number: 1.5680
Classification: Alloy special steel
Applicable Standards
  • EN 10028-4: 2009 - Flat products made of steels for pressure purposes. Nickel alloy steels with specified low temperature properties
  • EN 10222-3: 1999 - Steel forgings for pressure purposes. Nickel steels with specified low-temperature properties
  • EN 10216-4: 2014 - Seamless steel tubes for pressure purposes. Technical delivery conditions. Non-alloy and alloy steel tubes with specified low temperature properties
  • EN 10269: 1999 - Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties
Chemical Composition (%) - EN 10028-4-2003
Cr+Cu+Mo < 0.5%; According EN 10216-4:2014 0.5 =< Ni =< 5.3
Element Content
C max 0.15
Si max 0.35
Mn 0.3 - 0.8
Ni 4.75 - 5.25
P max 0.02
S max 0.005
V max 0.05
Mechanical Properties
Nominal thickness (mm): to 50
Rm - Tensile strength (MPa) (+N) 510-710
Nominal thickness (mm): to 30 30 - 50
ReH - Minimum yield strength (MPa) (+N) 390 380
Impact Energy (J)
Temperature Longitudinal (+N) Transverse (+N)
+20°C 70 50-60
0°C 70 60
-20°C 65-70 45-55
-40°C 65 45
-50°C 65 45
-60°C 60-65 40-45
-80°C 60 40
-100°C 45-50 30
-120°C 40 27
Nominal thickness (mm): to 50
A - Min. elongation at fracture (%) (+N) 19-20
A - Min. elongation at fracture (%) longitudinal (+QT) 21
Z - Reduction in cross section on fracture (%) (+N) 50
Equivalent Grades
Warning! Only for reference EU
EN France AFNOR
X12Ni5 5Ni390
Z10N05
X12Ni5 welding neck flanges product illustration
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