Industry Activities 

John Chen Screw Ind. Co., Ltd. established in 1981 is a Taiwanese manufacturer specialized in stainless steel fasteners. The stainless steel John Chen uses is directly imported from Japan. Having been certified to ISO-9001, John Chen continues to stick to its core value of “breakthrough & innovation.” Its credibility, quality and service have earned a solid presence in Taiwanese fastener industry.
John Chen handles wire coil import, wire drawing, screw manufacturing, surface treatment and mold production all by itself. Hence, it is able to quickly offer clients various standard/customized screws at reasonable prices.
New Perfect Stainless Steel Products with Advanced Anti-rust Performance
John Chen has recently released the “JOHNTEK Perfect Stainless Steel,” which can completely replace Ti-6Al-4V, SUS#630, SUS#410.420 and SCM435 alloy steel screws. Most people think of Ti-alloy as the best, lightest, strongest and most corrosion-resistant aerospace alloy steel, so many industrial products on the market are considered the best choices if they are marked as “made of Ti-alloy”. Moreover, the prices could be higher. Despite its advantages, Ti-alloy is, in fact, not so perfect. For example, its tensile strength is not high enough, it is cannot be bent too much or deformed beyond its limit, and it is prone to mechanical fatigue.
John Chen’s Perfect Stainless Steel has outperformed Ti-alloy. For example, although Ti-alloy weighs only 58% of the total weight of traditional S/S, the mechanical strength (such as tensile strength, bending & shaping limit and hardness) of Perfect S/S is 1.78 times stronger than that of Ti-alloy, completely exerting its conformity to the demand for a lightweight and small size with high strength and safety nowadays.
Moreover, what’s worth noting is the significant drop in cost. This material only costs less than 1/10 the price of Ti-alloy. In other words, it can reduce cost by at least 90%. Such Perfect S/S can be formed through cold/warm/hot forging and the capacity of this S/S is also 60 times quicker than processing Ti-alloy and SUS#630. As a result, its cost is only less than 1/10 the cost of Ti-alloy and SUS#630. In addition, Ti-alloy and SUS#630 can be only processed through traditional cutting forming or hot forging and at least 50% of the materials used will be wasted, not to mention the very high price of Ti-alloy. However, Perfect S/S can be formed through cold/warm/hot forging and only less than 3.5% of materials used will be wasted, which can save a lot in material cost.
The anti-rust performance of Perfect S/S is 6 times better than the performance of S/S #316. Thus far, this S/S has been approved in many tests to be able to sustain at least 6,000-15,000 hrs of salt spray test without rust or corrosion. In addition, it has been also approved in SGS acid rain test to be able to sustain up to 100 cycles without rust or corrosion. The most remarkable point is that it does not require any electroplating and painting rustproof treatments. According to some data collected from lab experiments by many metal experts, if the product is placed outdoors, it is estimated to exist without the occurence of rust for about 2 centuries, which is definitely the best material.
To generalize the aforesaid advantages, this Perfect S/S is suitable for aerospace, construction, bikes and other industrial & medical device applications requiring high corrosion resistance, pleasing appearance and high mechanical strength.
Success After Years of Devotion
The successful R&D of Perfect S/S is one of the best examples of “no pain, no gain.” John Chen spent so much time and many efforts without any government’s subsidy and it took 80 million NTD and 17.5 years for John Chen to develop the product. John Chen finally reached the goal after nearly 18 years of dedication to material acquisition, processing, control and mass production. So far, clients who have used its products all give John Chen thumbs up. The mission statement of John Chen is to develop more diverse products with continuously improving quality, strength and performance that satisfy clients’ needs.