Websit: https://www.jmtornillo.com
Ahora me gustaría presentarles nuestro perno con cabeza cuadrada.
Nuestro perno con cabeza cuadrada serán hechos de acero al carbono y acero inoxidable, este es de acero inoxidable, y este es de acero al carbono del acabado galvanizado. Eso es ASTM 307 Gr.A que está nuestra marca JM, también podría ser su marca.
Por cierto, producimos los pernos con cabezas cuadradas no estándares según su dibujos o muestras.
Shanghai Jian&Mei es una empresa profesional que produce pernos, nuestro productos son aplicados principalmente en las areas Acero estructural, Edificio metal, Petróleo&Gas, Torre&Polo, Viento, Energía, Máquina mecánica, automóvil, Decoración etc.
Ofrecemos todos los tamaños.
El material sería acero al carbono, acero de aleación, acero inoxidable y cobre.
Grados disponibles de pernos son SAE J429 Gr 2,5,8, ASTM, A307,A490,ASTM A193 B7 and class 4.8 6.8 8.8,10.9,12.9,
El acabado sería Zinc, Zinc amarillo, Óxide negro, HDG etc.
Exportamos Perno con cabeza cuadrada con alta calidad al mercado américa más de 8 años y nos disfrutamos muy bueno reputación, somos su prroveedor reliable de elementos de sujeción.
No duden en contactarno en cualquier momento.
Shanghai Jian & Mei Industry and Trade Co., Ltd
Rm.27202, No.295 South Lingyan Road, Pudong,Shanghai,P.R.C, Code:200126
Tel: 0086-21-33328690-8058
Fax: 0086-21-68413263
English Web：www.jm-industry.com Websit: https://www.jmtornillo.com
Contact: Mrs.Xarella Huang
Email: Jminfo@jm-industry.com
Websit: https://www.jm-industry.com
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Product Description :
Caring For Your Sterling Silver Jewelry
Silver should not come into contact with harsh household chemicals such as bleach, ammonia, or chlorine. To avoid scratches, store silver in a lined jewelry box or pouch, as it is prone to tarnish as it naturally reacts with sulfur or hydrogen sulfide in the air. Cleaning and wearing silver jewelry regularly will prevent this and help maintain its shine. Immediately upon noticing any discoloration, use a gentle polish made specifically for removing tarnish.
Sterling Silver Composition
While pure silver can be combined with many different types of metals, sterling silver is created when combining pure silver with copper. Sterling silver jewelry can be composed with different amounts of copper but is most often seen with the .925 stamp, meaning that the composition is of 92.5 percent silver and 7.5 percent copper. This has been found to be a good combination for maintaining the silver’s durability without harming its sparkle.
History
Experts believe that silver alloy, used today as sterling silver, originated in continental Europe in the 12th century. Pure silver was found to be a soft and easily damageable material. When combined with other metals, most commonly cooper; it produced a tougher material that could be heavily relied on. Throughout the next few centuries, sterling silver was used as currency and household items. It was often used as silverware and became the material used in a proper table setting between 1840 and 1940 throughout the United States and Europe. Because of this popularity, silver companies began to grown. During this craze, companies began to experiment using sterling silver compositions in jewelry as it was a material that was easy to mold into intricate designs and gave a luxurious look with its metallic finish. Today, sterling silver is widely used in all kinds of jewelry styles and shines as beautifully as other precious metals, with the benefit of affordable pricing.
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