22NiCrMo12-5*

General Information

22NiCrMo12-5* is a group of carburizing steel with high hardenability. High strength combined with excellent toughness and high fatigue strength makes them well suited for applications in the mining industry. Tight alloying windows provides the grades with excellent hardenability and strength control. Can be delivered as rolled, annealed or austenitized and air hardened.

253A - Standard variant with high hardenability and controlled sulphur content for improved machinability.

253R - Variant with reduced sulphur content to meet the clean steel BQ (Bearing Quality) requirement for improved fatigue properties.

253L - Variant with increased carbon range for increased core hardness after carburizing. Controlled sulphur content for improved machinability.

253S - Variant with slightly increased carbon range for increased core hardness after carburizing. Controlled sulphur content for improved machinability.

4722 - Continous cast variant with slightly increased carbon range for increased hardness after carburizing.

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.

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

9317, 14NiCrMo13-4, 23NiCrMo12-5, 25NiCrMo12-5, 19NiCrMo11-5, EN27

Variant	Cast	Di	Weldability		C %	Si %	Mn %	P %	S %	Cr %	Ni %	Mo %
253A	IC		CEV 0.74_max	Min	0.21	0.20	0.65	-	0.015	1.25	2.85	0.22
Pcm 0.43_max	Max	0.23	0.35	0.75	0.020	0.025	1.35	3.00	0.26
253R	IC		CEV 0.93_max	Min	0.22	0.20	0.70	-	0.005	1.27	2.85	0.22
Pcm 0.45_max	Max	0.24	0.35	0.75	0.025	0.008	1.35	3.05	0.26
253L	IC		CEV 0.95_max	Min	0.22	0.20	0.55	-	0.015	1.20	2.85	0.20
Pcm 0.47_max	Max	0.26	0.35	0.75	0.025	0.025	1.40	3.15	0.27
253S	IC		CEV 0.75_max	Min	0.22	0.20	0.70	-	0.015	1.27	2.85	0.22
Pcm 0.45_max	Max	0.24	0.35	0.75	0.020	0.025	1.35	3.00	0.26
4722	CC	7.1	CEV 0.87_max	Min	0.22	0.20	0.55	-	0.015	1.20	2.85	0.20
Pcm 0.42_max	Max	0.26	0.35	0.75	0.025	0.025	1.40	3.15	0.27

Variant

Cast

Weldability

C %

Si %

Mn %

P %

S %

Cr %

Ni %

Mo %

253A

CEV 0.74_max

Min

0.21

0.20

0.65

0.015

1.25

2.85

0.22

Pcm 0.43_max

Max

0.23

0.35

0.75

0.020

0.025

1.35

3.00

0.26

253R

CEV 0.93_max

Min

0.22

0.20

0.70

0.005

1.27

2.85

0.22

Pcm 0.45_max

Max

0.24

0.35

0.75

0.025

0.008

1.35

3.05

0.26

253L

CEV 0.95_max

Min

0.22

0.20

0.55

0.015

1.20

2.85

0.20

Pcm 0.47_max

Max

0.26

0.35

0.75

0.025

1.40

3.15

0.27

253S

CEV 0.75_max

Min

0.22

0.20

0.70

0.015

1.27

2.85

0.22

Pcm 0.45_max

Max

0.24

0.35

0.75

0.020

0.025

1.35

3.00

0.26

4722

7.1

CEV 0.87_max

Min

0.22

0.20

0.55

0.015

1.20

2.85

0.20

Pcm 0.42_max

Max

0.26

0.35

0.75

0.025

1.40

3.15

0.27

Variant	Condition	Format	Dimension [mm]	Yield strength min [MPa]	Tensile strength [MPa]	Elongation A₅ [%]	Reduction of area Z_min [%]	Hardness
Rp_0.2 * R_eh, ** R_el
253A	+A	Round bar	25 < 80	500*	640-720	22	70	200-220 HB
+N	Round bar	25 < 80	800*	1200-1490	14	55	350 HB typical
+Q	Round bar	25 < 80	930*	1320-1420	11	57	440-460 HB
4722	+AR	Round bar	25 < 150	-	-	-	-	< 400 HB
+A	Round bar	25 < 150	-	-	-	-	< 269 HB

Variant

Condition

Format

Dimension [mm]

Yield strength min [MPa]

Tensile strength [MPa]

Elongation A₅ [%]

Reduction of area Z_min [%]

Hardness

Rp_0.2 * R_eh, ** R_el

253A

Round bar

25 < 80

500*

640-720

200-220 HB

Round bar

25 < 80

800*

1200-1490

350 HB typical

Round bar

25 < 80

930*

1320-1420

440-460 HB

4722

+AR

Round bar

25 < 150

< 400 HB

Round bar

25 < 150

< 269 HB

	Temperature °C
MS	356
AC1	696
AC3	787

Temperature °C

356

AC1

696

AC3

787

		Macro inclusions
Applied standard	ASTM E45	Applied standard	ISO 3763 (Blue fracture)
Sampling	ASTM A295	Sampling	Statistical testing on billets
Maximum average limits	A	BMicro inclusions	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

Macro inclusions

Applied standard

ASTM E45

Applied standard

ISO 3763

(Blue fracture)

Sampling

ASTM A295

Sampling

Statistical testing on billets

Maximum average

limits

BMicro inclusions

Limits

< 5 mm/dm²

2,5

1,5

1,0

0,5

Steel works	Hofors	Smedjebacken	Imatra
CO2e/kg	120	62	76

Steel works

Hofors

Smedjebacken

Imatra

CO2e/kg

120

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)
253	Round bar	+AR	1117	721
253	Round bar	+A	1124	724
253	Tube,wall	+A	1182	770
253	Tube,wall	+AR	1169	766
4722	Round bar	+A	963	661

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)

253

Round bar

+AR

1117

721

253

Round bar

1124

724

253

Tube,wall

1182

770

253

Tube,wall

+AR

1169

766

4722

Round bar

963

661

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

22NiCrMo12-5*

General Information

Similar designations

Chemical composition

Mechanical Properties

Transformation temperatures

Heat Treatment Guide generated Graphs

Hardenability

Steel cleanliness

CCT

Tempering response - 253

Case carburizing response - 253

SUSTAINABILITY-ENVIRONMENTAL IMPACT DATA

Other properties (typical values)

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