20Cr2*

General Information

Variant Ovako 126H is a carburizing steel with good toughness and high fatigue strength. Ovako 126H is a Bearing Steel Quality (BQ) variant.

BQ-Steel®

(Bearing Quality) is a bearing quality clean steel optimized for fatigue strength by a strict control of steel cleanliness. BQ-steel is also ideal for new design solutions in a wide array of demanding applications outside the bearing industry that require longer performance and higher loads. The BQ-steel offer is the result of the Ovako clean steel program. Purity of production means that the material has significantly smaller inclusions compared to conventional steel and, as a result, the fatigue strength of the steel is increased dramatically. Use of the material allows components to be manufactured in smaller sizes. The BQ-steel has for decades been the problem-solver.

* Designation followed by "*" is not an official EN standard grade but named according to the rules in EN 10027.

BQ-Steel^®

BQ-steel® is a bearing quality clean steel optimized for fatigue strength and is also ideal for new design solutions outside the bearing industry.

Similar designations

4118H

Variant	Cast	Weldability		C %	Si %	Mn %	P %	S %	Cr %	Ni %	Mo %	V %
126H	IC	CEV 0.59_max	Min	0.18	0.20	0.70	-	-	0.40	-	0.08	-
Pcm 0.36_max	Max	0.23	0.35	0.90	0.025	0.015	0.60	0.25	0.15	0.100

Variant

Cast

Weldability

C %

Si %

Mn %

P %

S %

Cr %

Ni %

Mo %

V %

126H

CEV 0.59_max

Min

0.18

0.20

0.70

0.40

0.08

Pcm 0.36_max

Max

0.23

0.35

0.90

0.025

0.015

0.60

0.25

0.15

0.100

Variant	Condition	Format	Dimension [mm]	Hardness
Rp_0.2 * R_eh, ** R_el
126H	+AR	Tube,wall	7 < 23	190 HB typical

Variant

Condition

Format

Dimension [mm]

Hardness

Rp_0.2 * R_eh, ** R_el

126H

+AR

Tube,wall

7 < 23

190 HB typical

	Temperature °C
MS	421
AC1	730
AC3	818

Temperature °C

421

AC1

730

AC3

818

Micro inclusions		Macro inclusions
Applied standard	ASTM E45	Applied standard	ISO 3763 (Blue fracture)
Sampling	ASTM A295	Sampling	Statistical testing on billets
Maximum average limits	A	B	C	D	Limits	< 2,5 mm/dm²
Th	He	Th	He	Th	He	Th	He
2,0	1,5	0,8	0,1	0	0	0,5	0,4

Micro inclusions

Macro inclusions

Applied standard

ASTM E45

Applied standard

ISO 3763

(Blue fracture)

Sampling

ASTM A295

Sampling

Statistical testing on billets

Maximum average

limits

Limits

< 2,5 mm/dm²

2,0

1,5

0,8

0,1

0,5

0,4

Youngs module (GPa)	Poisson´s ratio (-)	Shear module (GPa)	Density (kg/m3)
210	0.3	80	7800
Average CTE 20-300°C (µm/m°K)	Specific heat capacity 50/100°C (J/kg°K)	Thermal conductivity Ambient temperature (W/m°K)	Electrical resistivityAmbient temperature (µΩm)
12	460 - 480	40 - 45	0.20 - 0.25

Youngs module (GPa)

Poisson´s ratio (-)

Shear module (GPa)

Density (kg/m3)

210

0.3

7800

Average CTE 20-300°C (µm/m°K)

Specific heat capacity 50/100°C (J/kg°K)

Thermal conductivity Ambient temperature (W/m°K)

Electrical resistivityAmbient temperature (µΩm)

460 - 480

40 - 45

0.20 - 0.25

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Material data sheet

Steel grade

20Cr2*

General Information

Similar designations

Chemical composition

Mechanical Properties

Transformation temperatures

Heat Treatment Guide generated Graphs

Steel cleanliness

Other properties (typical values)

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