18MnMoNbR A05189 - GB 6654-1996

Grade	18MnMoNbR
China ISC	A05189
Corresponding Standard	GB 6654-1996 Steel Plates for Pressure Vessels
Classification	Alloy Steel

18MnMoNbR Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr ^①	Ni ^①	Cu ^①	Mo	Nb
Minimum Value	-	0.15	1.2	-	-	-	-	-	0.45	0.025
Maximum Value	0.22	0.5	1.6	0.035	0.03	0.3	0.3	0.3	0.65	0.05

18MnMoNbR Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Impact Energy Absorption KV2 J
30≤t≤60	Normalizing + tempering	590~740	≥440	≥17	≥34
30＜t≤100	Normalizing + tempering	570~720	≥410	≥17	≥34

Approximate Comparison Table Steel Plate for Boilers and Pressure Vessels

China	International Organization for Standardization	European Standard
GB	ISO	EN	Numerical Grade
18MnMoNbR	18MnMo4-5	18MnMo4-5	1.5414

18MnMoNbR Corresponding Standards(Same grade name, different standards)

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