USA UNS G41300
AISI
American Iron and Steel Institute
4130
Corresponding Standard ASTM A29/A29M-2012
Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Classification Alloy Steel
Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo More
Minimum Value 0.28 0.15 0.4 - - 0.8 - - 0.15
Maximum Value 0.33 0.35 0.6 0.035 0.04 1.1 0.25 0.35 0.25
① Silicon may be specified by the purchaser as 0.10 % maximum. The need for 0.10% maximum generally relates to severe cold-formed parts.
② residual elements: Ni, Cu
③ Standard alloy steels can be produced with a lead range of 0.15–0.35 %. Such steels are identified by inserting the letter “L” between the second and third numerals of the AISI number, for example, 41 L 40. A cast or heat analysis is not determinable when lead is added to the ladle stream.
Approximate Comparison Table Cold Heading Steel
China United States Germany France Russia United Kingdom
GB ISC ASTM/AISI UNS DIN EN/DIN W-Nr. NF EN/NF GOST BS EN/BS
ML30CrMo A30304 4130 G41300 ≈25CrMo4 1.7218 30CD4 30ХМА 9/0

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