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Grade 10B30
USA UNS G10301
Corresponding Standard ASTM A29/A29M-2020
General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
Classification Carbon Steel
10B30 Chemical Element Composition Content (%)
Component C Mn P S B
Minimum Value 0.28 0.6 - - 0.0005
Maximum Value 0.34 0.9 0.04 0.05 0.003
1 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
ML30B
GB/T 6478-2015
ML28B
GB/T 6478-2001 		A70304 SWRCHB 331
JIS G3508-1 		10B30
ASTM A29/A29M-12
ASTM A510/A510-13 		CE28B
ISO 4954-1993 		28B2
EN 10263-4-2001
2 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States
YB GB JIS ASTM
QML30B ML30B SWRCHB331 10B30
3 Approximate Comparison Table Steel for Cold Heading and Cold Extrusion
China Japan United States
GB JIS ASTM
ML30B
GB/T 28906-2025
GB/T 6478-2015 		SWRCHB331
JIS G3508-2021 		10B30
ASTM A29/A29M-23
10B30 Corresponding Standards(Same grade name, different standards)
1 ASTM A29/A29M-2005
10B30 G10301
2 SAE J403-2014
10B30 G10301
3 ASTM A29/A29M-2020
10B30 G10301
4 Q/BQB 517-2018
10B30
5 Q/ASB 234-2018
10B30
6 Q/XG 137-2018
10B30

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