{"id":1957,"date":"2023-06-02T08:26:00","date_gmt":"2023-06-02T08:26:00","guid":{"rendered":"https:\/\/waldunsteel.com\/?post_type=portfolio&p=1957"},"modified":"2023-11-13T02:51:05","modified_gmt":"2023-11-13T02:51:05","slug":"25crmo4-steel","status":"publish","type":"portfolio","link":"https:\/\/waldunsteel.com\/fr\/des-produits-2\/25crmo4-acier\/","title":{"rendered":"25CrMo4 Steel"},"content":{"rendered":"
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25CrMo4 Steel<\/h1>\n

In domestic and foreign standards, 25CrMo4 belongs to alloy structural steel, and also belongs to quenched and tempered steel in special steel.It is distinguishing for its good matching of high strength and high toughness through certain heat treatment.<\/p>\n

25CrMo4 Steel has excellent hardenability and tempering properties by adding proper Cr, Mo and other alloy elements.Through suitable tempering treatment,it maintains high strength and high toughness,as well as high temperature resistance,wear-resistant properties. 25CrMo4 Steel is suitable for the parts which serve in a complex environment.<\/p>\n<\/div>\n

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\"AISI<\/span><\/p>\n

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25CrMo4 STEEL CHEMICAL COMPOSITION<\/span><\/strong><\/h2>\n\n\n\n\n\n
Standard<\/td>\nGrade<\/td>\nC<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nMo<\/td>\n<\/tr>\n
EN10083<\/td>\n25CrMo4\/1.7218<\/td>\n0.22-0.29<\/td>\n\u22640.4<\/td>\n0.6-0.9<\/td>\n\u22640.025<\/td>\n\u22640.035<\/td>\n0.9-1.2<\/td>\n0.15-0.3<\/td>\n<\/tr>\n
25CrMoS4\/1.7213<\/td>\n0.22-0.29<\/td>\n\u22640.4<\/td>\n0.6-0.9<\/td>\n\u22640.025<\/td>\n0.02-0.04<\/td>\n0.9-1.2<\/td>\n0.15-0.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

25CrMo4\u00a0<\/span><\/strong>STEEL RELATED STANDARD &\u00a0EQUIVALENT GRADE<\/span><\/strong><\/h2>\n\n\n\n\n
China\/GB 3077<\/td>\nUSA\/ASTM A29<\/td>\nUK\/BS970<\/td>\nJapan\/JIS G4105<\/td>\n<\/tr>\n
30CrMo<\/td>\n4130<\/td>\n708M25<\/td>\nSCM430<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

What is the Difference Between 25CrMo4,4130 and SCM430 Steel?<\/strong><\/h2>\n

First of all, they all belong to Cr-Mo series low-alloy structural steel.As an equivalent grade, 4130 comes from ASTM A29 of American Standard, while SCM430 belongs to JIS G4105 of Japanese Standard.<\/p>\n\n\n\n\n\n\n
Grade<\/td>\nC<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nMo<\/td>\n<\/tr>\n
25CrMo4<\/td>\n0.22-0.29<\/td>\n\u22640.4<\/td>\n0.6-0.9<\/td>\n\u22640.025<\/td>\n\u22640.035<\/td>\n0.9-1.2<\/td>\n0.15-0.3<\/td>\n<\/tr>\n
4130<\/td>\n0.28-0.33<\/td>\n0.15-0.35<\/td>\n0.4-0.6<\/td>\n\u22640.035<\/td>\n\u22640.04<\/td>\n0.8-1.1<\/td>\n0.15-0.25<\/td>\n<\/tr>\n
SCM430<\/td>\n0.28-0.33<\/td>\n0.15-0.35<\/td>\n0.6-0.85<\/td>\n\u22640.035<\/td>\n\u22640.04<\/td>\n0.9-1.2<\/td>\n0.15-0.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

From the above table, we can clearly see that 25CrMo4 as a European steel grade is significantly higher than 4130 and SCM430 in the control requirements of harmful elements of sulfur and phosphorus.Due to the obvious difference in manganese elements, 4130 is difficult to replace 25CrMo4, while SCM430 and 24CrMo4 can be used instead of each other by adjusting the elements.<\/p>\n<\/div>\n

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QUICK FAQS FOR 25CrMo4 STEEL<\/strong><\/h2>\n

Can 25CrMo4 steel be used as quenched and tempered steel?<\/strong><\/p>\n

Yes,25CrMo4 steel is usually used in the quenched and tempered condition.After quenching and tempering, 25CrMo4 steel has high strength and toughness. In the machinery manufacturing industry, it is mainly used to manufacture parts with large cross-sections and work under high stress conditions.<\/p>\n

What is the Microstructure of 25CrMo4 Steel?<\/strong><\/h2>\n

The hot-rolled microstructure of 25CrMo4 is ferrite and pearlite. The typical grain size is more than level 8. The typical Vickers hardness is from 200 to 250.<\/p>\n

After spheroidizing annealing, 25CrMo4 can get 100% globular cementite microstructure, with Vickers hardness reduced to 125 or so, to obtain excellent formability.<\/p>\n

\"Metallographic<\/p>\n

25CrMo4 Steel Metallographic structure after spheroidizing annealing<\/p>\n

How is the\u00a0 Processing Performance of 25CrMo4 Steel?<\/strong><\/h2>\n

25CrMo4 has excellent heat-treatment properties. It can be used directly in hot-rolled condition, also can be cold-rolled for application of high precision parts. It is suitable for simple stamping parts in as rolled condition and suitable for fine-blanking and other complex forming after cold rolling and annealing to set good processibility.<\/p>\n

Can 25CrMo4 Steel be welded?<\/strong><\/h2>\n

When the alloying elements in 25CrMo4 steel are at the lower limit, the welding is quite good, but if it is close to the upper limit, the weldability is medium, and it needs to be preheated to above 175 \u2103 before welding.<\/p>\n

What is the Hardness of 25CrMo4 steel?<\/strong><\/h2>\n

When we talk about the actual hardness of 25CrMo4 steel, it usually refers to the quenched and tempered state.The specific hardness reference is as follows<\/p>\n