SFCM 830D SFCM 85D - JIS G 3221-1991

Grade	SFCM 830D
Old Grade
Corresponding Standard	JIS G 3221-1991 Chromium Molybdenum Steel Forgings for General Use
Classification	Alloy Steel

SFCM 830D Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	-	0.15	0.3	-	-	0.9	0.15
Maximum Value	0.48	0.35	0.85	0.03	0.03	1.5	0.3

① Cu as an impure content shall not exceed 0.03 %.
② The chemical composition can be determined through negotiation between the buyer and the manufacturer within the range shown in the table.

SFCM 830D Mechanical Properties

Diameter or thickness d（t） mm	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW	Impact Energy Absorption KV2 J
d(t)≤100	830~980	≥625	≥13	≥35	HB：≥241 HS：≥36	Impact value tangential ≥39 J/cm²
100＜d(t)≤200	830~980	≥610	≥12	≥33	HB：≥241 HS：≥36	Impact value tangential ≥39 J/cm²
200＜d(t)≤300	830~980	≥590	≥11	≥32	HB：≥241 HS：≥36	Impact value tangential ≥34 J/cm²
300＜d(t)≤400	830~980	≥590	≥10	≥31	HB：≥241 HS：≥36	Impact value tangential ≥34 J/cm²
400＜d(t)≤600	830~980	≥580	≥9	≥30	HB：≥241 HS：≥36	Impact value tangential ≥34 J/cm²

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!