[البرماوي]

[quote=ebrahem;313127]اية يا تاتا ما الكاربون استيل دى سبايك ليها استاندرد محدد يعنى قوى تحمل الشد والضغط والحرارة والانصهار عند درجة معينة ومقاومة التآكل والصدمات يعنى بتدى مواصفات معتمدة ومدروسة فى كل التطبيقات الى بتدخل فى تصنيعها..ياريت يا بشمهندس تدينا فكرة عن الهاندبوك للإستاندرد الامريكى والانجليزى والالمانى واليابانى والدولى .. لاننا درسنا فى الكلية الاستاندرد الروسى[
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A variety of materials comprise today's handguns. Some models feature a form of steel-either carbon or stainless-for both the frame and slide, while others have steel for the slide and either aluminum or polymer for the frame. Depending on the environment and carry method, duty firearms often become exposed to harsh conditions, such as water from rain, snow, perspiration, and other sources; dirt and sand; or numerous other hazards that can deteriorate handguns and affect proper function. For daily carry by either uniformed or plain-clothed officers, the materials and finish for weapons should be durable and easy to clean.

Stainless steel can offer more rust resistance than carbon steel (depending on the finish applied). Although stainless steel handguns often have a brighter, more reflective appearance than those with dark finishes, some models have a matte finish to reduce glare. Others even have a blackened stainless finish, offering the rust-resistant properties of stainless steel with the tactical superiority of a black, nonreflective finish. Generally, users find stainless steel handguns simpler to clean and maintain.

Blue finishes generally prove the least durable and rust resistant, although the dark color offers tactical advantages for law enforcement use. Proprietary durable black finishes form a protective coat over the metal, including hard and rust-resistant varieties, while also remaining nonreflective and relatively simple to maintain.

Handguns framed in steel tend to weigh more, which can impact ease of carry on a daily basis. Aluminum frames offer one solution. As another popular remedy, manufacturers offer handguns with frames made from polymer with imbedded parts, such as slide rails or other frame components, made out of metal. Handguns with polymer frames offer durability and ease of maintenance and often absorb some recoil from firing.