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Last revised: Mon, 17 May 2021 10:45:53 GMT

25CrMo4

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General Information

25CrMo4 is a Cr and Mo alloyed quench and tempering steel with low carbon content. The steel combine high strength with high toughness.

Variant 322A correspond to the EN grade 25CrMo4.
Variant 322D corresponds to SAE 4130 / 30CrMo4*. Suitable for flame or induction hardening.
Variant 322Q is an IQ steel that corresponds to SAE 4130
Variant 6014 is EN grade 25CrMo4 M-steel

Delivered as rolled, soft annealed, normalized or quench and tempered. Weldable under certain conditions.

IQ-Steel®

IQ-Steel® is an isotropic quality ultra clean steel optimized for high fatigue strength under multi axial loading.

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

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

Similar designations

SS2225, 4130, 1.7218

Chemical composition

Variant	Cast	Di	Weldability		C %	Si %	Mn %	P %	S %	Cr %	Ni %	Mo %
9224	CC		CEV 0.65_max	Min	0.22	-	0.60	-	-	0.90	-	0.15
9224	CC		Pcm 0.38_max	Max	0.29	0.40	0.90	0.035	0.035	1.20	-	0.30
322A	IC		CEV 0.78_max	Min	0.22	0.10	0.60	-	0.020	0.90	-	0.15
322A	IC		Pcm 0.45_max	Max	0.28	0.40	0.90	0.025	0.035	1.15	0.25	0.30
322D	IC		CEV 0.74_max	Min	0.28	0.20	0.40	-	-	0.90	-	0.18
322D	IC		Pcm 0.47_max	Max	0.33	0.35	0.60	0.025	0.010	1.10	0.25	0.25
322Q	IC		CEV _max	Min	0.29	0.20	0.60	-	-	0.90	0.15	0.20
322Q	IC		Pcm _max	Max	0.32	0.35	0.70	0.010	0.002	1.10	0.25	0.25
6014, MoC 210 M	CC	4.1	CEV 0.68_max	Min	0.22	0.05	0.60	0.000	0.015	0.90	-	0.15
6014, MoC 210 M	CC	4.1	Pcm 0.4_max	Max	0.29	0.40	0.90	0.025	0.035	1.20	-	0.30
25CrMo4 EN ISO 683-2	Std		CEV _max	Min	0.22	0.10	0.60	0.000	0.000	0.90	-	0.15
25CrMo4 EN ISO 683-2	Std		Pcm _max	Max	0.29	0.40	0.90	0.025	0.035	1.20	-	0.30

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
9224	+QT	Flat bar	-	1150**	1350-1700	6	0	410-515 HV	20 °C 20 J (long)
322A	+A	Tube,wall	-	420	590 typical	25	67	185 HB typical	-
	+A	Round bar	-	420	590 typical	25	67	185 HB typical	-
	+QT	Tube,wall	< 15	680	800 typical	15	65	250 HB typical	-
		Tube,wall	> 15	600	730 typical	15	60	230 HB typical	-
		Round bar	< 40	680	800 typical	15	65	250 HB typical	-
		Round bar	40 < 100	600	730 typical	15	60	230 HB typical	-
		Round bar	> 100	490	620 typical	15	50	200 HB typical	-
322D	+QT	Tube,wall	< 25	600	730 typical	23	70	225 HB typical	20 °C 193 J (long)
		Tube,wall	< 25	600	730 typical	23	70	225 HB typical	-20 °C 183 J (long)
		Tube,wall	< 25	600	730 typical	23	70	225 HB typical	-40 °C 176 J (long)
6014, MoC 210 M	+AR	Round bar	25 < 160	-	-	-	-	< 280 HB	-
	+A	Round bar	25 < 160	-	-	-	-	< 220 HB	-
	+QT	Round bar	25 < 40	600*	800-950	14	-	240-280 HB	-20 °C 27 J (long)
		Round bar	40 < 100	450*	700-850	15	-	200-250 HB	-20 °C 27 J (long)
		Round bar	100 < 160	400*	650-800	16	-	190-240 HB	-20 °C 27 J (long)

Transformation temperatures

	Temperature °C
MS	391
AC1	746
AC3	826

Heat treatment recommendations

Treatment	Condition	Temperature cycle	Cooling/quenching
Hot forging	+AR	850-1100°C	In still air
Normalizing	+N	840-880°C	In still air
Soft annealing	+A	700-730°C / 3h	In still air
Stress relieve annealing	+SRA	525-620°C	In still air
Hardening	+QT	840-870°C	In oil Temper immediately
Hardening	+QT	820-850°C	In water Temper immediately
Induction or Flame hardening	I-F	850-900°C	Water spray Temper immediately
Tempering	+T	550-675°C

Hardenability

The standard variant is the +HH version of 25CrMo4 EN ISO 683-2

Steel cleanliness

Micro inclusions - steel grade 322A + 322D									Macro inclusions - 322A + 322D
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	1.5	0.5	0	0	1.0	0.5

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

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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
Hardenability