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Grade ML15
China ISC U40152
Corresponding Standard GB T 6478-2001
Steels for cold heading and cold extruding
Classification Carbon Steel
ML15 Chemical Element Composition Content (%)
Component C Si Mn P S Cr * Ni * Cu *
Minimum Value 0.13 0.15 0.3 - - - - -
Maximum Value 0.18 0.35 0.6 0.035 0.035 0.2 0.2 0.2
①By agreement between the supplier and the purchaser, other grades of cold heading and cold extrusion steel may be supplied.
②Permissible deviations in the chemical composition of the steel shall comply with the relevant provisions of GB/T 222-1984.
ML15 Mechanical Properties
condition Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
% 		Reduction of Area
ψ
%
Steel Hot Rolling ≤530 ≥50
Steel Annealing ≤470 *
≥64
Sample diameter d=25 Heat Treatment 450~750 ≥260 ≥14
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
ML15 U40152 SWRCH15K SWRCH15K SWRCH15K 1015 G10150 CC15A
(A4Al) 		QSt38-3
(C14C)
Cq15
(C15C) 		1.0234
-
1.1132 		FR15
FB18
FR18 		15nc 0/3
2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States International Organization for Standardization European Standard
GB ISC JIS ASTM ISO EN Numerical Grade
ML15 U40152 SWRCH15K 1015 CC15K C15C 1.0234
3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan South Korea United States International Organization for Standardization Germany European Standard United Kingdom
GB JIS KS ASTM ISO DIN EN/DIN EN BS EN/BS
ML15 SWRCH15K SWCH15K 1015 CC15A
C15GC 		QSt38-3 C15E2C 0/3
ML15 Corresponding Standards(Same grade name, different standards)
1 GB T 6478-2001
ML15 U40152
2 GB /T 6478-2015
ML15 U40152
3 GB /T 5953-1999
ML15
4 Q/BQB 517-2018
ML15
5 GB /T 28906-2012
ML15 U40152
6 YB /T 5144-2006
ML15
7 GB /T 5953.1-2009
ML15
8 GB /T 5953.2-2009
ML15
9 Q/ASB 234-2018
ML15
10 GB /T 28906-2025
ML15 U40152

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