How to choose stainless steel spring

How to choose stainless steel spring

301 Stainless steel spring:

301 stainless steel spring is equivalent to 'piano wire in stainless steel'. The elasticity and fatigue are much higher than the previous two, which is very suitable for when the conventional stainless steel spring such as the spring of 302~304 material can not meet the force value demand. The recommended operating temperature is -40°~120° (it is not recommended to exceed 120°, otherwise the mechanical properties will decrease).

302 Stainless Steel spring:

302 springs made of stainless steel are actually very large in foreign countries, larger than 304. In terms of mechanical properties, the effect is stronger than 304 stainless steel springs, but the anti-rust can be slightly lower than 304 due to the different element content. However, on the whole, the distance is not large, and in many cases, the spring made of 302 and 304 can be replaced by another if the required elastic accuracy is not particularly high. The recommended application temperature is -40°~120° (do not advocate more than 120°, otherwise the mechanical properties will decrease) The recommended application temperature is -40°~120° (do not advocate more than 120°, otherwise the mechanical properties will decrease).

304 stainless steel spring:

The spring made of 304 stainless steel is also a large domestic use of stainless steel spring, 304 is a chrome-nickel stainless steel, divided into mirror, bright surface and fog surface 3 types. After the name we can see that the mirror is Z bright, just like a mirror, especially suitable for use as a medical device spring and arts and crafts spring, because the mirror stainless steel is not easy to stick grease, easy to clean. Compared with the mirror stainless steel spring, the surface lubrication is slightly worse, if it is to be used as a medical device spring, it needs to be polished after the spring is formed. After Z is the use of a large amount of fog surface stainless steel, this stainless steel due to the low price, relative to the first two, mechanical properties and anti-rust ability are the same, so, widely used in various needs of anti-rust springs. Recommended operating temperature is -40°~120° (do not advocate more than 120°, otherwise mechanical properties will decline)

316 Stainless steel spring:

316 stainless steel springs are more suitable for use in seawater than other types of stainless steel, and have better corrosion resistance than other brands of stainless steel. Together with low magnetic properties. Recommended operating temperature is -40°~120° (do not advocate more than 120°, otherwise mechanical properties will decline)

631 Stainless steel spring:

631 stainless steel spring is a kind of semi-austenitic deposition hardening stainless steel, which is used more in the mechanical and medical fields, with strong corrosion resistance and strength, and it has high fatigue resistance characteristics. In particular, high temperature resistance, 631 spring is different from other stainless steel, can be used between -40 to 380°, many cases are used as heat resistant spring steel.

130m stainless steel non-magnetic spring:

130m stainless steel non-magnetic spring has weak magnetism, suitable for use in electric power and instrumentation. Non-magnetic springs are not completely magnetically free. Steel is magnetic.

After Z, whether the stainless steel will be attracted by the magnet is not the basis for determining whether the stainless steel is non-magnetic, and the concept of stainless steel being attracted by the magnet is stainless iron is wrong. Steel wire in cold processing will produce friction, will be attached more or less magnetic, stainless steel content of Z is the largest component is iron, iron will be attracted by magnets. Another way is to temper the spring made of stainless steel after a high temperature of more than 800° to eliminate his magnetism, the organizational structure of stainless steel will change, and then cannot reach the characteristics of the data itself, so if you want to choose a non-magnetic spring, you must choose 130m stainless steel spring.