Grade 30CrMnSiA alloy steel plate GB/T 3077 standard

30CrMnSiA Alloy Steel Description

30CrMnSiA alloy steel is a medium carbon quenched and tempered steel with high strength and poor weldability. 30CrMnSiA has high strength, sufficient toughness and good hardenability after quenching and tempering. After quenching and tempering, the material can be used as grinding wheel shaft, gear and sprocket. 30CrMnSiA has good processability, small processing deformation and good fatigue resistance. Used for shafts, pistons and other spare parts. Used in various special wear-resistant parts of automobiles and aircrafts, etc.

30CrMnSiA military alloy steel grades are arranged in order by the average carbon content and alloying elements CrMnSi. As for the suffix A of 30CrMnSiA, it indicates the quality grade of the steel plate. It is clearly stipulated in the alloy steel standard that the quality of alloy steel is divided into three types: high-quality steel, high-grade high-quality steel, special-grade High-quality steel, among which high-grade high-quality steel and special-grade high-quality steel are indicated by adding capital letters A and E at the end of the brand name, and high-quality alloy steel without letters. 30CrMnSiA is generally delivered in the state of quenching and tempering, or in the state of annealing and normalizing. Quenching and tempering is equal to quenching and tempering. The quenching temperature is controlled at 880 degrees, and the tempering temperature is controlled at 520 degrees. The coolant is generally oil or water.

The characteristics of GB/T 30CrMnSiA alloy steel:

1. High strength: 30CrMnSiA alloy steel has high strength, the yield strength is 1050MPa, the tensile strength can reach 1250MPa, and the bending strength can reach 1150MPa.
2. High hardness: After normalizing treatment, the surface hardness of 30CrMnSiA alloy steel can reach HRC58-62, which can meet the requirements of different purposes.
3. Good fatigue resistance: 30CrMnSiA alloy steel has good fatigue resistance, its fatigue strength can reach 420MPa, its fatigue resistance limit strength can reach 540MPa, and its fatigue resistance limit can reach 580MPa. Require.
4. Excellent toughness: 30CrMnSiA alloy steel has excellent toughness, its yield point can reach 580MPa, and its yield point stretch ratio can reach 4.0, which can meet the requirements of different purposes.
5. Good corrosion resistance: 30CrMnSiA alloy steel has good corrosion resistance, its corrosion resistance rate of sodium phosphate is 20mg/h, the corrosion resistance rate of sodium sulfate is 2mg/h, and the corrosion resistance rate of sodium chloride is 0.2mg/h , can be used in demanding environmental conditions.

30CrMnSiA Alloy Steel Datasheet

Thickness: 1.2-250mm (2-100mm usually used)
Width: 900-4200mm (1000-2200mm usually used)
Length: 5000-18000mm or as your request
Surface: Clean, finishing,blasting and painting according to customer requirement
Certificate: API, ISO, SGS, BV, CE etc
Quality: MTC will be provided with goods, third part inspection is acceptable

30CrMnSiA Alloy Steel Chemical composition

30CrMnSiA Alloy Steel Mechanical Properties

Equivalent Grade of 30CrMnSiA Alloy Steel