# PRODUCTS / Chain / M.S.Galvanised Chain
RML uses high quality steel, especially formulated
and heat treated. Every heat treated
lot is sampled and destructively tested for material
strength and link elongation – assuring compliance
to designed criteria. All Chain is then proof
tested, 100%, every link.
The RML Chain is continuously hot dip
galvanised to provide the deep strong protective coating
you have come to expect which has over 30% more
zinc per unit volume than mechanical coating.
In the hot dip process, the galvanised zinc coating is
alloyed with the base steel creating a metallurgical
bond that is several orders of magnitude stronger
than mechanical bonding.
- • Work Load Limit (WLL) is the maximum load which the chains are designed to sustain in lifting use. The mean stress at this load is 200n/mm2 (MPA) and is based on a 4:1 factor of safety.
- • Manufacturing Proof Force (MPF) is the force to which during manufacture the chain is subjected to. The mean stress at this load is 500n/mm2 (MPA) which is 2.5 times the working load limit.
- • Minimum Breaking Load (MBL) is the minimum force of which the chain must withstand before failure. The mean stress at this load is 800n/mm2 (MPA). The minimum elongation before failure is 20%
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