The main difference is the manganese content:

1 High manganese steel (wear-resistant steel) refers to alloy steel with a manganese content of more than 10%. This type of steel contains 10% manganese. % ~ 15%, the carbon content is relatively high, generally 0.90% ~ 1.50%, most of which are above 1.0%.

2 The temper of manganese steel is very weird and interesting: if 2.5-3.5% manganese is added to steel, the resulting low manganese steel will be as brittle as glass and will break when knocked. However, if more than 13% manganese is added to make high manganese steel, it will become both hard and tough. When high manganese steel is heated to light orange, it becomes very soft and easy to process.

3. It is non-magnetic and will not be attracted by magnets. At present, people use a large amount of manganese steel to make steel mills, ball bearings, bulldozers and excavator buckets and other components that are often subject to wear, as well as rails, bridges, etc.

Extended information:

< p>Manganese steel is a kind of high-strength steel. It is mainly used to withstand harsh working conditions such as impact, extrusion, and material wear. The main form of damage is wear and consumption, partial fracture and deformation. Now it is generally suitable for engine underprotection. plate.

Manganese steel is a high-strength anti-wear steel, which is mainly used to withstand harsh working conditions such as impact, extrusion, and material wear. The main form of damage is wear and consumption, with partial fracture and deformation.

Casting wear-resistant steel and wear-resistant steel are mainly austenitic manganese steel. Low alloy steel that has been appropriately heat-treated under certain conditions also has good results. Graphite steel is used for lubrication and friction. Working conditions.

Wear-resistant high manganese steel is especially suitable for impact abrasive wear and high-stress grinding abrasive wear conditions. It is often used to manufacture ball mill liners, hammer crusher hammers, jaw crusher jaw plates, and cones. Impact-resistant and wear-resistant castings such as crusher rolling mortar wall and crushing wall, excavator bucket teeth and bucket walls, railway switches, track pads of tractors and tanks, etc. High manganese steel is also used in: bulletproof steel plates, safe steel plates, etc.

High manganese steel is a typical anti-wear steel, and its as-cast structure is austenite plus carbides. After water quenching at about 1000°C, the structure transforms into a single austenite or austenite plus a small amount of carbides, and the toughness increases instead, so it is called water toughening treatment.

The most important feature of high manganese steel is that under strong impact and extrusion conditions, the surface layer rapidly undergoes work hardening, so that the core layer still maintains good toughness and plasticity of austenite while hardening the layer. Has good wear resistance. This is unmatched by other materials. However, the wear resistance of high manganese steel only shows its superiority under conditions sufficient to form work hardening. In other cases, it is very poor.

The typical Mn17 wear-resistant high manganese steel increases the amount of manganese on the basis of Mn13 steel, which improves the stability of austenite and prevents the precipitation of carbides, thereby improving the strength and plasticity of the steel. , improve the work hardening ability and wear resistance of steel. For example, the service life of ZGMn18 railway forks used in the north is 20% to 25% longer than that of ZGMn13.

Wear-resistant steel

This type of steel contains 10% to 15% manganese and a relatively high carbon content, generally 0.90% to 1.50%, most of which are above 1.0%. Its chemical composition is (%):

C0.90～1.50Mn10.0～15.0

Si0.30～1.0 S≤0.05 P≤0.10 such high manganese The largest amount of steel is used, and it is often used to make shovel teeth of excavators, rolling surface walls and crushing walls of cone crushers, jaw crusher switch plates, ball mill linings, railway switches, plate hammers, hammer heads, etc.

International number

①Use international chemical element symbols and national symbols to indicate chemical ingredients, and use Arabic letters to indicate ingredient content: China and Russia 12CrNi3A;

②Use fixed-digit numbers to represent steel series or numbers: the United States, Japan, 300 series, 400 series, 200 series;

③Use Latin letters and order to form serial numbers, which only indicate usage.

China Numbering Rules

①Use element symbols

②Purpose, Chinese Pinyin, open-hearth steel: P, boiling steel: F, killed steel: Z, A Class steel: A, T8: Special 8, GCr15: Balls

◆Combined steel, spring steel, such as: 20CrMnTi 60Si2Mn, (C content expressed in ten thousandths)

◆ Stainless steel, alloy tool steel (C content expressed in thousandths), such as: 1Cr18Ni9 thousandth (that is, 0.1%C), stainless C≤0.08% such as 0Cr18Ni9, ultra-low carbon C≤0.03% such as 0Cr17Ni13Mo.

Identification method

The American Iron and Steel Institute uses three digits to identify various standard grades of forgeable stainless steel. Among them: ① Austenitic stainless steel is marked with 200 and 300 series numbers. For example, some common austenitic stainless steels are marked with 201, 304, 316 and 310.

② Ferrite Solid and martensitic stainless steels are represented by 400 series numbers.

③ Ferritic stainless steel is marked with 430 and 446, martensitic stainless steel is marked with 410, 420 and 440C, duplex (austenite-ferrite),

④ Stainless steel, precipitation hardened stainless steel and high alloys with an iron content of less than 50% are usually named after patented names or trademarks.

Reference materials: Baidu Encyclopedia - High manganese steel? Baidu Encyclopedia - Manganese steel