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Variants

Material data sheet

Steel grade

  • Ovako236
Last revised: Thu, 30 Jan 2020 15:59:39 GMT

General Information

20MnCr5 is a case-hardening steel with low carbon content but good hardenability reaching good wear resistance due to high surface hardness after hardening. The small grain size benefits in good ductility and fatigue strength. Suitable for gearboxes and axle gears.

Ovako 236F is a standard variant with controlled sulphur content for consistent machining properties.

Ovako 236Q is an IQ (isotropic quality) variant. 

IQ-Steel® 
(Isotropic Quality) is an isotropic quality ultra clean steel. IQ-Steel is optimized for fatigue strength by a strict control of steel cleanliness. IQ-Steel, a further development of BQ-Steel, is an isotropic and ultra clean steel with properties that match re-melted steels. Based on thousands of examinations by Ovako into the effects of defects on fatigue performance, the metallurgy of IQ-Steel is purer and far more consistent than conventional grades, and designed specifically to perform well in multi axial loading. This enables the manufacturing of lighter, slimmed down components like gears, bearings and other critical parts. The steels are helping our customers to achieve new design solutions and implement higher standards of finished product performance. Key to these practical advantages are Ovako’s own unique, clean and consistent modern steelmaking processes that remove harmful inclusions and impurities from within the steel. IQ-Steels contain smaller and more fragmented inclusions and can handle much higher mechanical forces in all directions than conventional steels. IQ-Steels are newer, but already now well established in high pressure automotive applications. Modern diesel engines, with high and cyclic injection pressures, have proven to be an ideal application. Transmission components are another emerging area of strong interest.

For additional Heat Treatment Data, please visit the Heat Treatment Guide.

Similar designations

20MnCrS5, 1.7147, 20MnCr4

The hardenability is estimated from cast analysis. The hardenability can be verified with the end quench test if agreed on enquire and order.Jominy hardenability of Ovako 236F:  Measured average value with +/-standard deviation.20MnCr5 :EN10084 is a reference.

Carburizing response

Heat treatment

Steel cleanliness

Micro inclusions - steel grade 236F   Macro inclusions - 236F
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
2.5 1.5 1.5 0.5 0 0 0.5 0.5
 
Micro inclusions - steel grade 236Q   Macro inclusions - 236Q
Applied standard DIN 50602  K1 Applied standard

ISO 3763

(Blue fracture)

10 M Hz UST

(Ovako internal procedure)

Sampling Six random samples from final product dimension Sampling Statistical testing on billets
Limits

The limit is dimension dependent. The average rating of six samples should not exceed the

limits given in the graph.

Limits < 1 mm/dm2

< 10 defects/dm3 

> 0,2 mm FBH 

IQ

Other properties (typical values)

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

Contact us

Would you like to know more about our offers? Don´t hesitate to contact us:

Via e-mail: info@ovako.com 

Via telephone: +46 8 622 1300

For more detailed information please visit http://www.ovako.com/en/Contact-Ovako/

  

 

Disclaimer

The information in this document is for illustrative purposes only. The data and examples are only general recommendations and not a warranty or a guarantee. The suitability of a product for a specific application can be confirmed only by Ovako once given the actual conditions.The purchaser of an Ovako product has the responsibility to ascertain and control the applicability of the products before using them. Continuous development may necessitate changes in technical data without notice. This document is only valid for Ovako material. Other material, covering the same international specifications, does not necessarily comply with the properties presented in this document.