QRO 90 Uddeholm QRO 90 Supreme

Grade	QRO 90
Other Names
Brand/Supplier	Austria -> Böhler-Uddeholm AG
Classification	Tool Steel
Properties	High-Temperature Resistance
Density	7.8 g/cm³

QRO 90 Chemical Element Composition Content (%)

Component	C	Si	Mn	Cr	Mo	V
Nominal Value	0.38	0.3	0.75	2.6	2.25	0.9

QRO 90 Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Hardness HBW
Sample 1	Hardening, quenching, tempering	1620	1400	HRC 48
Sample 2	Hardening, quenching, tempering	1470	1270	45
Sample 3	Hardening, quenching, tempering	1250	1100	40
	Softening Annealing			HB 180

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