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Home Material GB /T 5953.2-2009
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Grade ML20
Corresponding Standard GB /T 5953.2-2009
Classification Carbon Steel
ML20 Chemical Element Composition Content (%)
Component C Si Mn P S
Minimum Value 0.18 0.1 0.3 - -
Maximum Value 0.23 0.3 0.6 0.03 0.035
ML20 Mechanical Properties
diameter
d
mm		 Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Reduction of Area
ψ
% 		Hardness
HBW
d≤3 HD ≥850 ≥35
3＜d≤4 HD ≥690 ≥40
4＜d≤5 HD ≥570 ≥45
5＜d≤25 HD ≥480 ≥45 HRB
≤97
d≤25 SALD 450~570 ≥65 HRB
≤90
1 Approximate Comparison Table Cold Heading Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization Germany France Russia United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
ML20 U40202 SWRCH20K SWRCH20K SWRCH20K 1020 G10200 CC21A
(A5Al) 		Cq22
(C22C) 		1.1152 XC18
FR20 		20nc 0/4
2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States International Organization for Standardization Germany European Standard
GB ISC JIS ASTM ISO DIN EN/DIN W-Nr. EN Numerical Grade
ML20 U40202 SWRCH20K 1020 CC21K C20C 1.0411 C20C 1.0411
3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan South Korea United States International Organization for Standardization Germany United Kingdom
GB JIS KS ASTM ISO DIN EN/DIN BS EN/BS
ML20 SWRCH20K SWCH20K 1020 CC21A Cp22 0/4
ML20 Corresponding Standards(Same grade name, different standards)
1 GB T 6478-2001
ML20 U40202
2 GB /T 6478-2015
ML20 U40202
3 GB /T 5953-1999
ML20
4 GB /T 28906-2012
ML20 U40202
5 YB /T 5144-2006
ML20
6 GB /T 5953.1-2009
ML20
7 GB /T 5953.2-2009
ML20
8 GB /T 28906-2025
ML20 U40202

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