EN 10269 Heat Treatment

Guidance for delivery condition and heat treatment of steels and nickel alloys for fasteners

EN 10269 provides informative guidance on the heat treatment conditions used to achieve the specified mechanical and service properties required for fasteners at elevated and low temperatures.

Material designation	Heat-treatment symbol^a	Normalizing, quenching or solution annealing temperature °C	Type of cooling^b	Tempering or precipitation treatment (and time)^c °C
Steels for quenching and tempering
C35E	1.1181	+N	860 to 900	a	–
+QT	840 to 880	w, o	550 to 660
C45E	1.1191	+N	840 to 880	a	–
+QT	820 to 860	w, o	550 to 660
35B2	1.5511	+QT	840 to 880	w, o	550 to 660
20Mn5	1.1133	+N	880 to 920	a	–
25CrMo4	1.7218	+QT	840 to 880	w, o	540 to 680
42CrMo4	1.7225	+QT	820 to 860	o, w	540 to 680
42CrMo5-6	1.7233	+QT	840 to 870	o	600 to 700
40CrMoV4-6	1.7711	+QT^d	880 to 950	w , o	670 to 720
+QT^e	940 to 970	w , o	600 to 700
21CrMoV5-7	1.7709	+QT	880 to 950	a, o, w	680 to 720 (min. 2 h)
20CrMoVTiB4-10	1.7729	+QT	660 to 700 + 970 to 990	a, w, o	680 to 720
34CrNiMo6	1.6582	+QT	830 to 860	w , o	540 to 660
30CrNiMo8	1.6580	+QT	830 to 860	w , o	540 to 660
27NiCrMoV15-6	1.6957	+ QT	840 to 870	w , o	530 to 620
26 NiCrMo14-6	1.6958	+ QT	840 to 870	w , o	530 to 620 (min. 2 h)
X12Ni5	1.5680	+N	800 to 850	a	–
+NT	800 to 850	a	580 to 660
X8Ni9	1.5662	+N +N +T	880 to 930+770 to 830	a	540 to 600
+ QT	770 to 830	w, o	540 to 600
X15CrMo5-1	1.7390	+ NT	925 to 975	a	690 to 750
+QT	925 to 975	o	690 to 750
X22CrMoV12-1	1.4923	+QT1	1 020 to 1 070	a, o, w	680 to 740 (min. 2 h)
+QT2	1 020 to 1 070	a, o, w	660 to 720 (min. 2 h)
X12CrNiMoV12-3	1.4938	+QT	1 035 to 1 065	o	600 to 670
X19CrMoNiNbVN11-1	1.4913	+QT	1 100 to 1 130	a, o	670 to 720 (min. 2 h)
Austenitic steels
X2CrNi18-9	1.4307	+AT	1 000 to 1 100	w, a^h	–
X5CrNi18-10	1.4301	+AT	1 000 to 1 100	w, a^h	–
X4CrNi18-12	1.4303	+AT	1 000 to 1 100	w, a^h	–
X2CrNiMo17-12-2	1.4404	+AT	1 020 to 1 120	w, a^h	–
X5CrNiMo17-12-2	1.4401	+AT	1 020 to 1 120	w, a^h	–
X2CrNiMoN17-13-3	1.4429	+AT	1 020 to 1 120	w, a^h	–
X3CrNiCu18-9-4	1.4567	+AT	1 000 to 1 100	w, a^h	–
X6CrNi18-10	1.4948	+AT	1 000 to 1 080	w, a^h	–
X10CrNiMoMnNbVB15-10-1	1.4982	+AT+WW	1 030 to 1 070 + 650 to 750^f	w	–
a
X3CrNiMoBN17-13-3	1.4910	+AT	1 020 to 1 100	w, a^h	–
X6CrNiMoB17-12-2	1.4919	+AT	1 020 to 1 100	w, a^h	–
X6CrNiTiB18-10	1.4941	+AT	1 070 to 1 150	w, a^h	–
X6NiCrTiMoVB25-15-2	1.4980	+AT+P	970 to 990	o, w	710 to 730
X7CrNiMoBNb16-16	1.4986	+WW+P	g	–	750 to 800 (5 to 1 h); a^b
Nickel alloys
NiCr19Fe19Nb5Mo3	2.4668	+P	950 to 1 010	a	710 to 730 for 8 h⁺) furnace cooling down to 610 to 630, hold at 610 to 630. Total treatment time min. 18 h⁺)
NiCr20TiAl	2.4952	+AT+P	1 050 to 1 080	a	840 to 860, 24 h, a^b + 690 to 710, 16 h, a^b
NiCr15Fe7TiAl	2.4669	+AT+P	1 100 to 1 200	a	840 to 870, 24 h, a^b + 700 to 710, 16 h, a^b
^a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked. ^b a = air; o = oil; w = water or water-based medium. ^c Where in accordance with 8.2.4 a stress relieving after straightening has been agreed, the stress relieving temperature shall be chosen so that the specified properties are still obtained. ^d For diameters ≤ 100 mm. ^e For diameters > 100 mm to 160 mm. ^f Temperature range of warm working. ^g Warm worked from 750 °C to 850 °C. ^h Cooling sufficiently rapid. ⁺ Recommended time.

Material designation

Heat-treatment
symbol^a

Normalizing, quenching
or solution annealing
temperature
°C

Type of
cooling^b

Tempering or
precipitation
treatment (and time)^c
°C

Name

Number

Steels for quenching and tempering

C35E

1.1181

860 to 900

–

+QT

840 to 880

w, o

550 to 660

C45E

1.1191

840 to 880

–

+QT

820 to 860

w, o

550 to 660

35B2

1.5511

+QT

840 to 880

w, o

550 to 660

20Mn5

1.1133

880 to 920

–

25CrMo4

1.7218

+QT

840 to 880

w, o

540 to 680

42CrMo4

1.7225

+QT

820 to 860

o, w

540 to 680

42CrMo5-6

1.7233

+QT

840 to 870

600 to 700

40CrMoV4-6

1.7711

+QT^d

880 to 950

w , o

670 to 720

+QT^e

940 to 970

w , o

600 to 700

21CrMoV5-7

1.7709

+QT

880 to 950

a, o, w

680 to 720 (min. 2 h)

20CrMoVTiB4-10

1.7729

+QT

660 to 700 + 970 to 990

a, w, o

680 to 720

34CrNiMo6

1.6582

+QT

830 to 860

w , o

540 to 660

30CrNiMo8

1.6580

+QT

830 to 860

w , o

540 to 660

27NiCrMoV15-6

1.6957

+ QT

840 to 870

w , o

530 to 620

26 NiCrMo14-6

1.6958

+ QT

840 to 870

w , o

530 to 620 (min. 2 h)

X12Ni5

1.5680

800 to 850

–

+NT

800 to 850

580 to 660

X8Ni9

1.5662

+N +N +T

880 to 930+770 to 830

540 to 600

+ QT

770 to 830

w, o

540 to 600

X15CrMo5-1

1.7390

+ NT

925 to 975

690 to 750

+QT

925 to 975

690 to 750

X22CrMoV12-1

1.4923

+QT1

1 020 to 1 070

a, o, w

680 to 740 (min. 2 h)

+QT2

1 020 to 1 070

a, o, w

660 to 720 (min. 2 h)

X12CrNiMoV12-3

1.4938

+QT

1 035 to 1 065

600 to 670

X19CrMoNiNbVN11-1

1.4913

+QT

1 100 to 1 130

a, o

670 to 720 (min. 2 h)

Austenitic steels

X2CrNi18-9

1.4307

+AT

1 000 to 1 100

w, a^h

–

X5CrNi18-10

1.4301

+AT

1 000 to 1 100

w, a^h

–

X4CrNi18-12

1.4303

+AT

1 000 to 1 100

w, a^h

–

X2CrNiMo17-12-2

1.4404

+AT

1 020 to 1 120

w, a^h

–

X5CrNiMo17-12-2

1.4401

+AT

1 020 to 1 120

w, a^h

–

X2CrNiMoN17-13-3

1.4429

+AT

1 020 to 1 120

w, a^h

–

X3CrNiCu18-9-4

1.4567

+AT

1 000 to 1 100

w, a^h

–

X6CrNi18-10

1.4948

+AT

1 000 to 1 080

w, a^h

–

X10CrNiMoMnNbVB15-10-1

1.4982

+AT+WW

1 030 to 1 070
+
650 to 750^f

–

X3CrNiMoBN17-13-3

1.4910

+AT

1 020 to 1 100

w, a^h

–

X6CrNiMoB17-12-2

1.4919

+AT

1 020 to 1 100

w, a^h

–

X6CrNiTiB18-10

1.4941

+AT

1 070 to 1 150

w, a^h

–

X6NiCrTiMoVB25-15-2

1.4980

+AT+P

970 to 990

o, w

710 to 730

X7CrNiMoBNb16-16

1.4986

+WW+P

–

750 to 800 (5 to 1 h); a^b

Nickel alloys

NiCr19Fe19Nb5Mo3

2.4668

950 to 1 010

710 to 730 for 8 h⁺) furnace
cooling down to 610 to 630,
hold at 610 to 630. Total
treatment time min. 18 h⁺)

NiCr20TiAl

2.4952

+AT+P

1 050 to 1 080

840 to 860, 24 h, a^b
+
690 to 710, 16 h, a^b

NiCr15Fe7TiAl

2.4669

+AT+P

1 100 to 1 200

840 to 870, 24 h, a^b
+
700 to 710, 16 h, a^b

^a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked.
^b a = air; o = oil; w = water or water-based medium.
^c Where in accordance with 8.2.4 a stress relieving after straightening has been agreed, the stress relieving temperature shall be chosen so that the specified properties are still obtained.
^d For diameters ≤ 100 mm.
^e For diameters > 100 mm to 160 mm.
^f Temperature range of warm working.
^g Warm worked from 750 °C to 850 °C.
^h Cooling sufficiently rapid.
⁺ Recommended time.

Specifications

Surface Treatments

Xylan 1070 / 1014 / 1400 / 1424

Xylar 2 / 101

Geomet 321 / 500 / 720

SermaGard 1105 / 1280

Dacromet 320 / 500

TakeCoat 1000 Ceramic

Delta Tone/Seal

Magnigard

MolyKote

Sherardized

Zinc-Cobalt (ASTM B840)

Zinc-Nickel (ASTM B841)

Certifications

ISO 9001 - 2015 Certified
PED 2014/68/EC
NACE MR0175/ISO 15156-2
NORSOK M-650
DFAR
MERKBLATT AD 2000 W2/W7/W10

EN 10269 Heat Treatment

Specifications

Surface Treatments

Certifications

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