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Variants

Last revised: Tue, 02 May 2023 13:15:40 GMT

24CrMo13-6

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General Information

Ovako 420G is a through hardening alloy steel with god wear resistance in the as-rolled condition. It is also a good nitriding steel for enhanced wear resistance. Mainly used for drill rods.

• Good toughness

• Good dimensional stability

• Through hardenability corresponding to approximately 130 mm

• Delivered as rolled, soft annealed or QT

Similar designations

BS 722 M 24

Chemical composition

Variant	Cast	Weldability		C %	Si %	Mn %	P %	S %	Cr %	Ni %	Mo %	V %
420G	IC	CEV 1.21_max	Min	0.23	0.20	0.50	-	0.010	3.00	-	0.45	-
420G	IC	Pcm 0.53_max	Max	0.25	0.35	0.60	0.020	0.025	3.50	0.03	0.60	0.050
EN ISO 683-5	Std	CEV _max	Min	0.20	-	0.40	-	-	3.00	-	0.50	-
EN ISO 683-5	Std	Pcm _max	Max	0.27	0.40	0.70	0.025	0.035	3.50	-	0.70	-

Mechanical Properties

Variant	Condition	Format	Dimension [mm]	Yield strength min [MPa]	Tensile strength [MPa]	Elongation A₅ [%]	Reduction of area Z_min [%]	Hardness	Impact (ISO-V) strength_min
Rp_0.2 * R_eh, ** R_el
420G	+A	All formats	25 < 130	-	-	-	-	230 HB typical	-
	+N	All formats	25 < 130	800*	1300 typical	13	54	370 HB typical	20 °C 62 J (long)
	+QT	All formats	25 < 130	1130*	1570 typical	11	50	430 HB typical	20 °C 55 J (long)

Transformation temperatures

	Temperature °C
AC1	776
AC3	859

Heat treatment recommendations

Treatment	Condition	Temperature cycle	Cooling/quenching
Hot forging	+AR	840-1040°C	In air
Normalizing	+N	930-960°C	In air
Quench & Tempering	+QT	840-880°C	In oil or in air
Tempering	+T	160-250°C	In air

Heat Treatment Guide generated Graphs

The following graphs are generated from a theoretical model. For further info see the Heat treatment guide module. Select a specific grade version for individual display.

CCT - steel grade Ovako 420G

Tempering response - Ovako 420G

Steel cleanliness

Micro inclusions - steelgrade 420G									Macro inclusions - 420G
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	< 5 mm/dm²
	Th	He	Th	He	Th	He	Th	He
	2.5	1.5	1.0	0.5	0	0	0.5	0.5

SUSTAINABILITY-ENVIRONMENTAL IMPACT DATA

At Ovako sustainability and reduction of our environmental impact is a major focus in everything we do.

Further information is found here.

In many international comparisons the crude steel Scope 1-2 emission is a key parameter, ie. the CO₂ emission from the steel works itself.
As of 1 January 2022 we carbon offset all our scope 1 and 2 volume shown below.

Steel works	Hofors	Smedjebacken	Imatra
CO2e/kg	120	62	76

To get the full picture of our products environmental impact we have to look at all of our CO₂ emission sources.
Not only the steel work Scope 1-2 itself, but all operations downstream in our production, heating and heat treatment furnaces etc (full scope 1-2) as well as all the emission from input material, eg. alloys, scope 3.

Steel Grade	Format	Condition	Scope 1-3 (CO2e kg /1000 kg steel)	Climate compensated Net emission = Scope 3 (CO2e kg /1000 kg steel) Scope 1 - 2 = 0 (compensated)
420G	Round bar	+AR	655	262
420G	Round bar	+A	659	263
420G	Tube,wall	+A	687	285
420G	Tube,wall	+AR	687	285

As of 1 January 2022 we use carbon offset for all our scope 1- 2 emissions, so in practice the climate compensated data is the same as the full Scope 3 level.
All above data are to be seen as typical values for the specified format and condition. Detailed information about your specific product please contact your sales contact.

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.

General information
Chemical composition
Mechanical properties
Transformation temp.
Heat treatment
HTG Graphs
Sustainability