Andrews Fasteners Ltd

AndFast Malaysia SDN BHD

The Fasteners Specialist

+44 (0) 113 246 9992

ISO 898-2: Carbon Steel and Alloy Steel – Nuts

Chemical composition as per ISO 898-2 for typical grades

CLASSMATERIAL AND TREATMENTC
MAX.
MN
MIN.
P
MAX.
S
MAX.
8 (M16 AND BELOW)CARBON STEEL (MAY BE QUENCHED AND TEMPERED)0.580.250.0600.150
8 (ABOVE M16)CARBON STEEL QUENCHED AND TEMPERED0.580.300.0480.058
10CARBON STEEL QUENCHED AND TEMPERED0.580.300.0480.058
12CARBON STEEL QUENCHED AND TEMPERED0.580.450.0480.058

Hardness requirement as per ISO 898-2 for typical grades

HARDNESS SCALESIZECLASS 8
MIN.
CLASS 8
MAX.
CLASS 10
MIN.
CLASS 10
MAX.
CLASS 12
MIN.
CLASS 12
MAX.
VICKERS, HVM5 TO M16200302272353295353
ABOVE M16 TO M39233353272
BRINELL, HBM5 TO M16190287259336280336
ABOVE M16 TO M39221336259
ROCKWELL, HRCM5 TO M163026362936

ISO 898-2:2012 Mechanical properties of fasteners made of carbon steel and alloy steel — Part 2: Nuts with specified property classes — Coarse thread and fine pitch thread