Chemical composition (main alloying elements) in wt%
EN
Steel designation
EN
Number
AISI
Number
Number
C
Cr
Mo
Others
Remarks
X12Cr13
1.4006
410
0.12
12.5
—
—
Base grade, used as stainless engineering steel
X20Cr13
1.4021
420
0.20
13.0
—
—
Base grade, used as stainless engineering steel
X50CrMoV15
1.4116
-
0.50
14.5
0.65
V: 0.15
Used chiefly for professional knives
X14CrMoS17
1.4104
430F
0.14
16.5
0.40
S: 0.25
Sulphur improves machinability
X39CrMo17-1
1.4122
-
0.40
16.5
1.10
—
Used chiefly for professional knives
X105CrMo17
1.4125
440C
1.10
17.0
0.60
—
Tool steel grade (440C), high wear resistance
X17CrNi16-2
1.4057
431
0.17
16.0
—
Ni: 2.00
Ni replaces some C for higher ductility & toughness
X4CrNiMo16-5-1
1.4418
-
≤ 0.06
16.0
1.10
Ni: 2.00
Highest corrosion resistance of martensitics
X5CrNiCuNb16-4
1.4542
630 (17/4PH)
≤ 0.07
16.0
-
Ni: 4.00
Cu: 4.00
Nb: 5xC to 0.45
Precipitation hardening grade
High strength. Used in aerospace
參考文獻
^Rodney P. Carlisle. Scientific American Inventions and Discoveries. John Wiley and Sons. 2004: 380 [2013-02-15]. ISBN 978-0-471-24410-3. (原始内容于2014-10-02).
^A non-rusting steel. New York Times. 31 January 1915.