To begin to determine what properties should have the material for the manufacture of underwater knives. Steel must be sufficiently strong to keep grinding, but it is enough and flexible so as not to break when chopping and lateral loads. For underwater knives and more important condition is resistant to corrosion. Hear other arguments on the topic with Connecticut Senator. Based on these assumptions, and is the choice of material for the manufacture of underwater knife. But there needs to be done maaalenkoe digression: underwater knife this is the part of the diving equipment that is lost most often.
Therefore, manufacturers have recognized his own will power an underwater knife consumable. And as any consumable material (in our case, underwater knife) should be made out of cheap raw materials. Guided by these precepts, manufacturers, and choose materials for their production. The most common material for manufacture of underwater knives – it's stainless steel. Leafed mountain directories of manufacturers of equipment for underwater hunting, we came to the conclusion that, with rare exceptions, in the manufacture of underwater knives used Stainless steel AISI 304 and AISI 420. For those interested in conduct a short course in materials science.
Stainless steel AISI 304 (in the Soviet classification 08H18N10) refers to the austenitic steels with low carbon content, contains up to 18% Cr and 8% Ni. For non- devoted to the intricacies of this shamanic science diver decipher: moderate rusting steel (with chromium content up to 17% after operation in seawater appear red spots) is soft. It is easy to sharpen on any cobbles, with such as prostate blunts with any prolonged use.
In Slayp played by the ancient Norse warriors – the Vikings. In many naval campaigns helped the game tough and reclusive northern warriors channel the energy into its peaceful course, for the moment, fist fights and forget about the bloody battles. In short, the game could for a while humble violent and dangerous habits of the ancient warriors. Then replaced by a show of force demonstration of the superiority of the mind. But not boredom and idleness forced the Vikings to while away long hours at sea playing Slayp. The game helped the soldiers to fight to hone skills, endurance and precision strikes. On the board for a game of billiards Scandinavian, also called as Slayp, invincible warriors played pictures of upcoming battles destroying the enemy army. Comparison with bloody battles Slaypa somewhere off the coast of northern seas is no accident! The Game is to score a pawn of the enemy in a pocket located at the corners of the table.
Pawns same like the host of the enemy, placed in a row on the opposite side of the table. Such a "balance of forces" like mine before the first hard battle! Not by chance the Vikings spent many hours playing Slayp. But not only severe temper the game, so much like the character of ancient warriors, and not only its practical benefits, not once saved the Vikings in the bloody battles, forced the Northern people to love her. Have another Scandinavian pool, very important quality in the sea. Pawns and bits of Slap not round, as in other types of billiards and flat, resembling a hockey puck.
This form – the undoubted advantage of the sea. Slayp as its first players, not afraid of sea disturbances and storms. Despite the pitching, the rain and bad weather behind, the Vikings continued to fight hard to hone skills in a favorite game.