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Grade 440C
Corresponding Standard CNS 3477-2016
Stainless Steel Wire Rods
Classification Martensitic Stainless Steel
Properties Good Machinability
440C Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Mo
Minimum Value 0.95 - - - - 16 - -
Maximum Value 1.2 1 1 0.04 0.03 18 0.6 0.75
1 Approximate Comparison Table Stainless Bearing Steel
China Taiwan, China Japan South Korea Russia
GB ISC CNS JIS KS GOST
9Cr18 S44090 440C SUS440C STS440C 95Х18
2 Approximate Comparison Table Stainless Bearing Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Sweden
GB ISC CNS JIS KS ASTM/AISI ISO DIN EN/DIN W-Nr. NF EN/NF SKF
9Cr18Mo
G102Cr18Mo 		S45090
B21810 		440C SUS440C STS440C A756 440C X108CrMo17
(B52) 		X102CrMo17 1.3543 Z100CD17 SKF577
STORA577
3 Approximate Comparison Table Martensitic Stainless Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France European Standard Russia
GB ISC CNS JIS KS ASTM UNS ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST
108Cr17
(11Cr17)
9Cr18 		S44096 440C SUS 440C STS 440C 440C S44004 X105CrMo 17
A-1b
(ISO 683-13-1986) 		X105CrMo 17 1.4125 Z100CD17 X105CrMo 17 1.4125 95Х18
440C Corresponding Standards(Same grade name, different standards)
1 ASTM A959-2004
440C S44004
2 ASTM A493-2009(2013)
440C S44004
3 ASTM A276/A276M-2017
440C S44004
4 ASTM A473-2018
440C S44004
5 ASTM A756-2017
440C A756 440C
6 ASTM F899-2020
440C S44004
7 ASTM A493-2016
440C S44004
8 ASTM A959-2019
440C S44004
9 CNS 3477-2016
440C
10 ASTM A 314-2025
440C S44004
11 ASTM A 473-2024(a)
440C S44004
12 ASTM A 493-2025
440C S44004
13 ASTM A276/A276M-2025
440C S44004
14 ASTM A473-2026
440C S44004
15 ASTM A756-2017(R2022)
440C A756 440C

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!