Alloy C22 
2.4602 – N06022

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Material description

Material 2.4602 is a nickel-chromium-molybdenum alloy. This alloy boasts good resistance to pitting, crevice corrosion and stress corrosion cracking. In addition, 2.4602 (Alloy C22) offers excellent resistance to oxidising aqueous media (e.g. moist chlorine gas and mixtures with nitric acid or oxidising acids and chloride ions) and to reducing aqueous media.  

An overview of the properties of 2.4602:  

  • Good resistance to pitting, crevice corrosion and stress corrosion cracking 
  • Excellent resistance to oxidising and reducing media 
  • Good resistance to aqueous oxidising and reducing media 

Applications

  • Chemical industry (e.g. production of phosphoric acid) 
  • Environmental protection and recycling plants  
  • Offshore technology 
  • Chlorination and sulphation systems

Material data

Material no.: 2.4602
Name: Alloy C22
UNS no.: N06022
ASTM: B564 / B574
VdTÜV: 479
Other: DIN 17740/17752
Material type: Corrosion-resistant alloy

Chemical composition in %

ASTM B564/574VdTÜV Material Sheet 479
Mo12.5 – 14.512.5 – 14.5
Cr20.0 – 22.520.0 – 22.5
Fe2.0 – 6.02.0 – 6.0
W2.5 – 3.52.5 – 3.5
Co, max.2.52.5
C, max.0.0150.010
Si, max.0.080.080
Mn, max.0.500.50
V, max.0.350.35
P, max.0.020.025
S, max.0.020.010
NiRemainderRemainder

Mechanical properties

solution annealedBar | Forging
ASTM B574 | ASTM B564
Bar | Forging
D ≤ 250 mm | D ≤ 160 mm
Rm (MPa)≥ 690690 – 950
Rp 0.2 (MPa)≥ 310≥ 310
Rp 1.0 (MPa)≥ 335
A (%)≥ 45≥ 45
Av (J)≥ 120

The specified values are non-binding guide values.

Data sheet