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En15048 for Non-preloaded Structural Bolting and Assemblies

En15048 is European Standard specifies the general requirements for the components of bolt/nut/washer assemblies for non-preloaded structural bolting and for the assemblies themselves. It applies to bolts (including screws, studs and stud bolts) and nuts made of carbon steel, alloy steel and stainless steel with the following property classes: AGICO supplies alloy steel hex head bolt with high strength levels,8.8, 10.9, 12.9,etc, nuts 8,10, 12. washers according to hardness class HV 100 or HV 200.

General Mechanical Characteristics of Hex Bolts

Mechanical characteristicRelevant standard for property class
carbon steel and alloy steel
8.8, 10.9
Elongation after fractureEN ISO 898-1
Minimum tensile strengthEN ISO 898-1
Lower yield strength or
Stress at 0,2 % non-proportional
elongation
EN ISO 898-1
Stress under proof loadEN ISO 898-1
Strength under wedge loadingEN ISO 898-1
HardnessEN ISO 898-1

Minimum Impact Strength of Hex Bolts

CharacteristicFor property classes
carbon steel Characteristic and alloy steel
4.6, 5.6, 8.8, 10.94.8, 5.8, 6.8
Impact strength KV,min
at – 20 °C
27 J
Impact strength KV,min
at + 20 °C
27 J

Hex Nuts

Mechanical characteristicRelevant standard for property class
carbon steel and alloy steel
4, 5, 6, 8, 10, 12
Stress under proof loadEN 20898-2
HardnessEN 20898-2

Washers

Mechanical characteristicFor all carbon steel, alloy steel and
stainless steel bolt property
classes
For property classes 8.8 and 10.9
in a single lap joint according to
EN 1993-1-8:2005, 3.6.1
Hardnessminimum 100 HV300 HV to 370 HV

Appropriate Combinations of Bolts, Nuts and Washers

Assemblies made of carbon steel or alloy steel
BoltsNutsWashers
Property classProperty classHardness
8.88 or 10100 HV min. or
300 HV min. a
10.910 or 12

Tensile Resistance of Bolt/nut Assemblies Made of Carbon and Alloy Steel

ThreadNominal
stress
area
As, nom
mm2
Property class
8.8 , 10.9
Minimum tensile resistance in N
M30561466000583000
M33694576000722000
M36817678000850000

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