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DIN931 SS304 SS316 Stainless Steel Bolts Half Thread Hex Head Bolts M10-M80

Categories Stainless Steel Bolts
Brand Name: HNF
Model Number: DIN931
Certification: ISO9001
Place of Origin: Zhejiang
MOQ: 1000 pcs
Price: Negotiation
Payment Terms: L/C, T/T, Western Union
Supply Ability: 400 ton per month
Delivery Time: 15-20days
Packaging Details: customize packing
Product Name: Stainless Steel Hex Bolts DIN931
Material: Stainless Steel SS304 SS316
Head Style: Hex Head
Thread: Half Thread
Diameter: M10-M80
Color: Plain
Industry Standards: DIN931
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    DIN931 SS304 SS316 Stainless Steel Bolts Half Thread Hex Head Bolts M10-M80

    SS304 SS316 Stainless Steel Hex Bolts DIN931 half thread Hex Head Bolts M10-M80

    1.Product Description

    tainless steel screws usually refer to steel screws that are resistant to corrosion in air, water, acid, salt or other media. Stainless steel screws are generally not rusty, durable, and can be used for environmental or medical equipment. Communication equipment, etc.

    Depending on the composition of the alloy, the emphasis is placed on rust resistance and acid resistance respectively. Although some steels have rust resistance, they are not necessarily acid resistant, while acid resistant steels are usually rustless in people's daily life. Often referred to stainless steel is also austenitic stainless steel. We use stainless steel fasteners, the main raw materials are austenite 302,304,316 and "low nickel" 201 and so on.

    Stainless steel usually refers to steels that are resistant to corrosion in air, water, acid, alkali or other media. Depending on the composition of the alloy, emphasis is placed on rust resistance and acid resistance, respectively. Some steels have rustless properties. But not necessarily acid resistant, acid resistant steel is usually rustless. Used in the production of fasteners are mainly austenitic stainless steel, in people's daily life. Often referred to stainless steel is also austenitic stainless steel. We use stainless steel fasteners, the main raw materials are austenite 302,304,316 and "low nickel" 201 and so on.

    Mainly used in: environmental protection equipment, medical equipment, communication equipment, power facilities, electronic products, instrumentation, food machinery, petrochemical, marine assembly, pump valve piping, building curtain wall, open air, sports facilities. Outdoor decoration, etc.

    Stainless steel screw selection principle:

    The choice of stainless steel materials is mainly considered in the following five aspects .

    1 . In terms of mechanical properties of stainless steel screw materials , especially strong

    Degree requirements;

    2, the requirements of the working conditions on the corrosion resistance of the materials;

    (3) the requirements of working temperature on the heat resistance (high temperature strength, oxidation resistance) of the materials;

    4. The requirement of material processing performance in production process;

    5, other aspects, such as weight, price, procurement and many other factors to be considered.

    People often think that magnets adsorb stainless steel, verify its advantages and disadvantages and authenticity, do not absorb magnetic, think it is good, real; If the sucker is magnetic, it is considered to be a fake. In fact, this is an extremely one-sided, unpractical way of identifying mistakes. There are a wide variety of stainless steel screws. It can be divided into several categories according to the structure at room temperature: 1. Austenitic type: such as 304,321,316,310; 2. Martensite or ferrite type: for example, 430,420,410; Austenitic type is nonmagnetic or weakly magnetic, martensite or ferrite is magnetic. Stainless steel usually used as decorative tube plate is mostly austeniteThe 304 material of somatotype, say generally is nonmagnetic or weak magnetic, but because smelting causes chemical composition to fluctuate or processing state is different also may appear magnetism, but this cannot be considered to be false or unqualified, what reason is this? The above mentioned austenite is nonmagnetic or weakly magnetic while martensite or ferrite is magnetic due to improper segregation or heat treatment during smelting. It causes a small amount of martensite or ferrite in the austenitic 304 stainless steel. In this way, there is weak magnetism in the austenitic 304 stainless steel. In addition, the 304 stainless steel is cold-worked. The microstructure will also be transformed to martensite. The larger the deformation degree of cold working is, the more the horse will become.The more the transformation of the body, the greater the magnetic properties of the steel. Like a lot of steel strip, Φ 76 tubes are produced without obvious magnetic inductance, and Φ 9.5 tubes are produced. The bigger magnetic inductance is due to the cold bending deformation, the more obvious the magnetic inductance is. The deformation of square rectangular tube is much larger than that of circular tube, especially in the corner part, and the deformation is more intense and magnetic. The magnetic properties of 304 steel caused by the above reasons should be completely eliminated. Stabilization of austenitic microstructure can be restored by high temperature solution treatment, thereby eliminating magnetic properties. In particular, the magnetic properties of 304 stainless steel due to the above reasons are similar to those of other stainless steels, such as 430. The magnetic properties of carbon steel are completely different from those of the same class.That is to say, the magnetic properties of 304 steel always show weak magnetism. This tells us that if stainless steel has weak magnetism or no magnetism at all, it should be classified as 304 or 316 material. If with carbon steel magnetism, show strong magnetism, because the discrimination is not 304 material.

    2. Specification

    DiameterPitchLengthSubtenseHead Thickness

    More details:

    Product DimensionsM10 x 40mm
    Item Weight35kg 1000 pieces
    Free SampleAvailable, only shipping need to be charged
    Thread typeParitcial Thread

    Corrosion Resistance,High Tensile, offer high holding power


    Stainless steel screws are widely used in machinery , petrochemical , communication , chemical industry , construction industry , electric power , textile , sports equipment , paper making , sewage treatment , ship , automobile and other industries . With the improvement of domestic economic living standard , the application scope of stainless steel screw will be more extensive .

    Stainless steel screws, as the name implies, must be made of stainless steel screws and wire piers. After rubbing the screw thread. And stainless steel screws have a lot of properties related to stainless steel material. Considering the properties and organization of stainless steel. To understand the properties of stainless steel, so as to understand that stainless steel has anti-rust, anti-corrosion, high-temperature and other good mechanical properties. Then stainless steel screws of course have these good mechanical properties. With the material of stainless steel more and more excellent. Screw industry produced stainless steel screws on the mechanical properties of better and better. Rust prevention. Corrosion resistance, and high temperature and pressure is getting stronger and stronger.

    Type 302 for machine-working screws and self-tapping bolts.

    Model 303 to improve cutting performance of stainless steel type 303 added a small amount of sulfur, used in bar processing nuts.

    Model 304 is suitable for stainless steel screw processing by hot upsetting, such as long specification bolts and large diameter bolts, which may be beyond the range of cold heading process.

    Model 305 is suitable for cold heading processing stainless steel screws, such as cold forming nuts, hexagonal bolts.

    Type 309 and 310, which contain more Cr and Ni than 18-8 stainless steel, are suitable for working stainless steel screws at high temperature.

    Both 316 and 317 contain Mo-alloy elements, so their high temperature strength and corrosion resistance are higher than those of 18-8 stainless steel.

    Type 321 and 347 type , 321 type containing more stable alloying elements Ti and 347 contain Nb , thus improving the intergranular corrosion resistance of the material . It is suitable for stainless steel standard parts which are not annealed after welding or serve at 420 to 1013 DEG C .


    Stainless steel screws do not necessarily corrode rust. Just say stainless steel screw is stronger than iron screw to carry corrosion rusty ability. But stainless steel screw still can rust under certain circumstance. So stainless steel screw is easy to cause rust under what condition! What is the cause of rust?

    Stainless steel screws have good characteristics, strong corrosion bearing ability, high temperature resistance. Also has the strong anti-rust performance. But in the bad environment still will rust. For example the stainless steel screw in the very damp condition, every day the sun is drenched, the wind and rain blows. The time is long. It's more or less sure to rust. In contact, for example, with some acid-base chemicals to produce a chemical reaction that causes corrosion. And stainless steel screws that are not good. For example, the material of stainless steel SUS201 screws used in the sea water products, due to regular time immersion, the original SUS201 stainless steel screws itself is not too muchSuitable for use in seawater with strong salt properties, resulting in corrosion and rust. For use on seawater products, stainless steel SUS316 screws are generally recommended. Because 316 stainless steel screw to carry corrosion and other performance is better.

    From the above it can be concluded that stainless steel screws will still corrode rust under certain circumstances. This requires the rational use of stainless steel screws. In different cases use different stainless steel screws. And in different situations, in the use of stainless steel screws, also need to pay special attention to some of the details of the problem. Think about it. Try to control stainless steel screw corrosion and rust.

    5.More pictures

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