25CrMo4

General Information

Grade Ovako 322A and 322D are 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 6014 is EN grade 25CrMo4 M-steel

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

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.

M-Steel^®
The concept: Our M-Steel treatment can be applied to any steel grade. The basis for the concept is that non-metallic inclusions are modified and controlled with calcium treatment. These inclusions are modified in a way to maximize machinability and to improve transverse fatigue strength. In this way, a protective layer is formed on the cutting tool during machining that very significantly reduces the wear on the tool and increases the tool life. At every stage of the M-Steel production process the material is optimised to improve machinability, from raw material through melt, to casting, hot rolling and the final heat treatment. Individual delivery requirements can be met to supply your material in the best form for your machines in compliance with tight straightness and dimensional tolerances. M-Steel has a consistent machinability from cast to cast, meaning that machines can be run with fixed high cutting rates and predictable tool change intervals from one production run to another. Recent findings also show that the M-Steel effect is particularly pronounced in turning in very hard condition using Cubic Boron Nitride (CBN) inserts. Replacing traditional grinding of case- or induction-hardened surfaces with Hard Part Turning can mean very large cost savings, together with production lead time and quality improvements.

Similar designations

9224 - 27CrMo4-2, 30CrMo4*, 30CrMo4, SS2225, 4130

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
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
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
Pcm 0.47_max	Max	0.33	0.35	0.60	0.025	0.010	1.10	0.25	0.25
25CrMo4 EN10083-3:2006 (ref)	Std		CEV 0.65_max	Min	0.22	-	0.60	-	-	0.90	-	0.15
Pcm 0.38_max	Max	0.29	0.40	0.90	0.025	0.035	1.20	-	0.30
SS142225 (1986)* (ref)	Std		CEV _max	Min	0.22	0.10	0.60	-	-	0.90	-	0.15
Pcm _max	Max	0.29	0.40	0.90	0.035	0.035	1.20	-	0.30
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
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
Pcm _max	Max	0.29	0.40	0.90	0.025	0.035	1.20	-	0.30

Variant

Cast

Weldability

C %

Si %

Mn %

P %

S %

Cr %

Ni %

Mo %

9224

CEV 0.65_max

Min

0.22

0.60

0.90

0.15

Pcm 0.38_max

Max

0.29

0.40

0.90

0.035

1.20

0.30

322A

CEV 0.78_max

Min

0.22

0.10

0.60

0.020

0.90

0.15

Pcm 0.45_max

Max

0.28

0.40

0.90

0.025

0.035

1.15

0.25

0.30

322D

CEV 0.74_max

Min

0.28

0.20

0.40

0.90

0.18

Pcm 0.47_max

Max

0.33

0.35

0.60

0.025

0.010

1.10

0.25

25CrMo4 EN10083-3:2006 (ref)

Std

CEV 0.65_max

Min

0.22

0.60

0.90

0.15

Pcm 0.38_max

Max

0.29

0.40

0.90

0.025

0.035

1.20

0.30

SS142225 (1986)* (ref)

Std

CEV _max

Min

0.22

0.10

0.60

0.90

0.15

Pcm _max

Max

0.29

0.40

0.90

0.035

1.20

0.30

6014, MoC 210 M

4.1

CEV 0.68_max

Min

0.22

0.05

0.60

0.000

0.015

0.90

0.15

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

0.90

0.15

Pcm _max

Max

0.29

0.40

0.90

0.025

0.035

1.20

0.30

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	-
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)
SS142225 (1986)* (ref)	+QT	All formats	< 160	410	640-780	16	65	185-230 HB	-
All formats	< 100	600	800-950	15	55	235-285 HB	-
All formats	< 40	700	900-1100	13	55	270-325 HB	-
+A	All formats	-	-	-	-	-	< 212 HB	-
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)

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

410-515 HV

20 °C 20 J (long)

322A

Tube,wall

420

590 typical

185 HB typical

Round bar

420

590 typical

185 HB typical

+QT

Tube,wall

< 15

680

800 typical

250 HB typical

Tube,wall

> 15

600

730 typical

230 HB typical

Round bar

< 40

680

800 typical

250 HB typical

Round bar

40 < 100

600

730 typical

230 HB typical

Round bar

> 100

490

620 typical

200 HB typical

322D

+QT

Tube,wall

< 25

600

730 typical

225 HB typical

20 °C 193 J (long)

Tube,wall

< 25

600

730 typical

225 HB typical

-20 °C 183 J (long)

Tube,wall

< 25

600

730 typical

225 HB typical

-40 °C 176 J (long)

SS142225 (1986)* (ref)

+QT

All formats

< 160

410

640-780

185-230 HB

All formats

< 100

600

800-950

235-285 HB

All formats

< 40

700

900-1100

270-325 HB

All formats

< 212 HB

6014, MoC 210 M

+AR

Round bar

25 < 160

< 280 HB

Round bar

25 < 160

< 220 HB

+QT

Round bar

25 < 40

600*

800-950

240-280 HB

-20 °C 27 J (long)

Round bar

40 < 100

450*

700-850

200-250 HB

-20 °C 27 J (long)

Round bar

100 < 160

400*

650-800

190-240 HB

-20 °C 27 J (long)

	Temperature °C
MS	391
AC1	746
AC3	826

Temperature °C

391

AC1

746

AC3

826

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

Treatment

Condition

Temperature cycle

Cooling/quenching

Hot forging

+AR

850-1100°C

In still air

Normalizing

840-880°C

In still air

Soft annealing

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

550-675°C

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

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

Limits

< 5 mm/dm²

2.5

1.5

0.5

1.0

0.5

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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Steel grade

25CrMo4

General Information

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Mechanical Properties

Transformation temperatures

Heat treatment recommendations

Heat Treatment Guide generated Graphs

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