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Grade X10CrAlSi18
ISO Numeric Designation 4742-430-77-I
Old Grade
Corresponding Standard ISO 4955-2016
Heat-resistant Steels
Classification Alloy Steel
Properties Corrosion Resistance
X10CrAlSi18 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Al
Minimum Value - 0.7 - - - 17 - 0.7
Maximum Value 0.12 1.4 1 0.04 0.015 19 1 1.2
X10CrAlSi18 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Hardness
HBW
flat products, 0.5≤t＜3 Annealing (+A) 500~700 ≥270 ≥13 ≤212
flat products, 3≤t≤12 Annealing (+A) 500~700 ≥270 ≥15 ≤212
Profiles, hexagons; 5≤d≤25 Annealing (+A) 500~700 ≥270 ≥15 ≤212
Bars and Profiles, 1.5≤d≤25 Annealing (+A) 500~700 ≥270 ≥15 ≤212
Forgings, 5≤d≤15 Annealing (+A) 500~700 ≥270 ≥15 ≤212
Approximate Comparison Table
International Organization for Standardization European Standard
ISO Numerical Grade Numerical Grade
X10CrAlSi18 4742-430-77-I 1.4742
X10CrAlSi18 Corresponding Standards(Same grade name, different standards)
1 EN 10088-1-2005
X10CrAlSi 18 1.4742
2 ISO 4955-2005
X10CrAlSi18 (5)
3 EN 10095-1999
X10CrAlSi18 1.4742
4 DIN EN 10095-2018
X10CrAlSi18 1.4742
5 ISO 15510-2014
X10CrAlSi18 4742-430-77-I
6 ISO 4955-2016
X10CrAlSi18 4742-430-77-I (5)

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