EN 10269 Grade 26NiCrMo14-6 (1.6958) Bolts, Studs, Nuts Manufacturer

EN 10269 Grade 26NiCrMo14-6 (1.6958) Fasteners

High-Nickel Chromium-Molybdenum Low-Alloy Steel Bolts, Stud Bolts, Screws, Nuts & Washers in EN 10269 Grade 26NiCrMo14-6 (1.6958)

EN 10269 Grade 26NiCrMo14-6 (1.6958) Fasteners are high-nickel chromium-molybdenum low-alloy steel fasteners providing outstanding toughness, strength, and resistance to temper embrittlement, used in critical bolting for nuclear, power generation, and high-pressure petrochemical equipment.

EN 10269 26NiCrMo14-6 Chemical composition

Material designation	Chemical composition, % by mass
26 NiCrMo 14-6	1.6958	0,25 to 0,30	0,15 to 0,30	0,20 to 0,50	0.020	0,015 b	0,005 to 0,050	-	1,20 to 1,70	0,35 to 0,55	3,30 to 3,80	≤ 0,12	-
a Elements not listed in this table may not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the usefulness of the steel. b A controlled sulphur content of 0,015 % to 0,030 % improves the machinability and is therefore recommended and may be agreed at time of enquiry and order. For weldability, a controlled sulphur content of 0,008 % to 0,030 % is recommended and may be agreed at time of enquiry and order. c For requirements regarding magnetic properties up to a maximum of 0,28 % C.

Material designation

Chemical composition, % by mass

Name

Number

P max.

S max.

Al tot

Others

Steels for quenching and tempering

26 NiCrMo 14-6

1.6958

0,25 to 0,30

0,15 to
0,30

0,20 to 0,50

0.020

0,015 b

0,005 to
0,050

1,20 to 1,70

0,35 to 0,55

3,30 to 3,80

≤ 0,12

a Elements not listed in this table may not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the usefulness of the steel.
b A controlled sulphur content of 0,015 % to 0,030 % improves the machinability and is therefore recommended and may be agreed at time of enquiry and order. For weldability, a controlled sulphur content of 0,008 % to 0,030 % is recommended and may be agreed at time of enquiry and order.
c For requirements regarding magnetic properties up to a maximum of 0,28 % C.

EN 10269 26NiCrMo14-6 Mechanical properties

Mechanical properties at Room Temperature

Mechanical properties at room temperature and at 20 °C of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC^b

Material designation	Heat treatment condition^a	Diameter c	Proof strength	Tensile strength	Elongation after fracture	Reduction in area	Impact energy (ISO-V) at 20°C
26 NiCrMo-14-6	1.6958	+QT	d ≤ 70	940	1 040 to 1 240	14	50	55
70<d ≤ 160	36
a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B). b Products made of steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC, see Annex 1, 7.5 of this directive. c For rectangular cross-sections "d" will be replaced by "b" (see Figure 1).

Material designation

Heat treatment condition^a

Diameter c

Proof strength

Tensile strength

Elongation after fracture

Reduction in area

Impact energy (ISO-V) at 20°C

Name

Number

d mm

Rp0,2 MPa min.

Rm MPa

A % min.

Z % min.

KV2 J min.

26 NiCrMo-14-6

1.6958

+QT

d ≤ 70

940

1 040 to 1 240

70<d ≤ 160

a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened;
+QT = quenched and tempered; +WW = warm worked (see Annex B).
b Products made of steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC, see Annex 1, 7.5 of this directive.
c For rectangular cross-sections "d" will be replaced by "b" (see Figure 1).

EN 10269 26NiCrMo14-6 Proof strength

Minimum 0,2 %-proof strength values at elevated temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC d

Material designation	Heat treatment condition^a	Diameter e d mm	Minimum 0,2 %-proof strength Rp0, 2 in MPa at a temperature (in °C) of:
26 NiCrMo14-6	1.6958	+QT	70 < d ≤ 160	-	853	843	834	804	785	765	-	-	-	-	-	-
a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B). b This steel grade is generally not applied in the creep range. c Values in brackets signify that the steel is not intended for use (and testing) at those temperatures. d Products made to these steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC; see Annex 1, 7.5 of this directive. e For rectangular cross sections "d" will be replaced by "b" (see Figure 1). *) Values calculated by linear interpolation.

Material designation

Heat treatment condition^a

Diameter e d mm

Minimum 0,2 %-proof strength Rp0,
2 in MPa at a temperature (in °C) of:

Name

Number

100

150

200

250

300

350

400

450

500

550

600

650

26 NiCrMo14-6

1.6958

+QT

70 < d ≤ 160

853

843

834

804

785

765

a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B).
b This steel grade is generally not applied in the creep range.
c Values in brackets signify that the steel is not intended for use (and testing) at those temperatures.
d Products made to these steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC; see Annex 1, 7.5 of this directive.
e For rectangular cross sections "d" will be replaced by "b" (see Figure 1).
*) Values calculated by linear interpolation.

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 Grade 26NiCrMo14-6 (1.6958) Fasteners

EN 10269 26NiCrMo14-6 Chemical composition

EN 10269 26NiCrMo14-6 Mechanical properties

Mechanical properties at Room Temperature

Mechanical properties at room temperature and at 20 °C of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC^b

EN 10269 26NiCrMo14-6 Proof strength

Minimum 0,2 %-proof strength values at elevated temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC d

Specifications

Surface Treatments

Certifications

About Us

Satisfaction Survey

EN 10269 Grade 26NiCrMo14-6 (1.6958) Fasteners

EN 10269 26NiCrMo14-6 Chemical composition

EN 10269 26NiCrMo14-6 Mechanical properties

Mechanical properties at Room Temperature

Mechanical properties at room temperature and at 20 °C of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/ECb

EN 10269 26NiCrMo14-6 Proof strength

Minimum 0,2 %-proof strength values at elevated temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC d

Specifications

Surface Treatments

Certifications

About Us

Satisfaction Survey

Mechanical properties at room temperature and at 20 °C of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC^b