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USA UNS G10300
SAE
Steel Number		 1030
Corresponding Standard ASTM A682/A682M-2005
Standard Specification for Steel, Strip, High-Carbon, Cold-Rolled, General Requirements For
Classification Carbon Steel
Chemical Element Composition Content (%)
Component C Si ① Mn P S Cr ② ③ Ni ② Cu ② Mo ②
Minimum Value 0.28 0.15 0.6 - - - - - -
Maximum Value 0.34 0.3 0.9 0.03 0.035 0.25 0.3 0.3 0.1
* There is no specified limit on aluminum, vanadium, niobium, and titanium, but the analysis shall be reported.
① When agreed by purchaser and supplier, other silicon ranges are permissible.
② The sum of copper. nickel, chromium, and molybdenum shall not exceed 0.80 % on heat analysis. When one or more of these elements is specified, the sum does not apply, in which case only the individual limits on the remaining elements will apply.
③ When the chromium is specified or added for antigraphitization, the maximum shall be 1.40 wt. %.
New and Old Grade Replacement List
Corresponding Standard Grade
ASTM A682/A682M-2005
USA UNS
SAE
ASTM A684/A684M-2024
SAE
1 Approximate Comparison Table High-Quality Carbon Structural 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
30 U20302 S30C S30C SM30C 1030 G10300 C30E4 C30E
Ck30 		1.1178 C30E
SC32 		30 C30E
080M30
2 Approximate Comparison Table Cold Heading Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization France Russia United Kingdom
GB ISC CNS JIS KS ASTM/AISI UNS ISO NF EN/NF GOST BS EN/BS
ML30 U40302 SWRCH30K SWRCH30K SWRCH30K 1030 G10300 CE28E4
(C2) 		XC32
FR33 		30 1/1
3 Approximate Comparison Table Cold Heading Steel
China Taiwan, China Japan South Korea United States International Organization for Standardization France
GB ISC CNS JIS KS ASTM/AISI UNS ISO NF EN/NF
ML30Mn U41302 SWRCH33K SWRCH30K
SWRCH33K 		SWRCH30K 1030 G10300 CE28E4 1C30
4 Approximate Comparison Table High-Quality Carbon Structural Steel
China Japan United States International Organization for Standardization Germany France European Standard Russia United Kingdom
GB JIS SAE ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST BS EN/BS
30 S30C 1030 C30
C30E4 		C30
Ck30 		1.0528 AF50C30
XC32 		C30 1.0528 30 080M32
En5

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