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Anonymous users2024-02-0640CRV bonded steel, 50CRV and 40CRV are different in carbon content and heat treatment hardness.
40crv mass fraction (%)
Carbon C: Silicon Si:
Manganese Mn:Sulfur S: Allowable residual content
Phosphorus p: permissible residual content
Chromium Cr: Nickel Ni: Permissible Residual Content
Copper Cu: Permissible residual content
Vanadium V: Specimen blank size
25mm heat treatment].
Quenching heating temperature ( ) 880; Coolant: Oil.
tempering heating temperature ( ) 650; Coolant: Empty.
Mechanical Properties] Tensile Strength B (MPa): 885(90)Yield Strength S (MPa): 735(75)Elongation δ5 ( 10
Cross-sectional shrinkage 50
Impact power AKV (J): 71
Impact toughness value kv (j cm2): 88(9)Brinell hardness (HBS100 3000) (annealed or high temperature tempered): 241Delivery Condition:
Delivered in heat-treated (normalized, annealed or high-temperature tempered) or without heat-treated, the delivery status should be indicated in the contract.
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Anonymous users2024-02-05The carbon C content is not the same, and the hardness of subsequent heat treatment is related.
40CRV alloy structural steel. Unified numeric code: A23402.
Quenched and tempered steel, with high strength and high yield point, the comprehensive mechanical properties are better than 40cr. The plasticity and machinability of cold deformation are medium, and the sensitivity to overheating is small, but there is a tendency to temper brittleness and white spot sensitivity. It is generally used in a quenched and tempered state.
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Anonymous users2024-02-04Presumably the hardness is different.
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Anonymous users2024-02-0340Cr is the standard steel grade of GB in China, and 40Cr steel is one of the most widely used steels in the machinery manufacturing industry. After quenching and tempering treatment, it has good comprehensive mechanical properties, good low-temperature impact toughness and low notch sensitivity. The hardenability of steel is good, it can be hardened up to 28 60mm when water quenched and 15 40mm when oil quenched.
In addition to quenching and tempering, this steel is also suitable for cyanide and high-frequency quenching. The machinability is good, when the hardness is HB174 229, the relative machinability is 60%. The steel is suitable for medium-sized plastic molds.
Chemical composition( )Ni: ,P: ,S: ,Cu: ,Mechanical properties.
Tensile strength ( b mpa): 980
Yield point ( s mpa): 785
Elongation after fracture (δ5 %): 9
Section shrinkage (%): 45
Work of impact absorption (aku2 j): 47
Brinell hardness (HBS100 3000).
Annealed or high-temperature tempered): 207
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Anonymous users2024-02-02Summary. Pro, this is a steel grade that belongs to the Chinese GB standard, and its main components are carbon, chromium, manganese, etc., of which the chromium content is. 40cr steel is characterized by high hardness, good wear resistance, adjustable strength and toughness, good processing performance, quenching, tempering and normalizing treatment, suitable for manufacturing various mechanical parts and gears, shafts, etc. used under high loads.
Common 40Cr steel materials also include 40CrNimoa, 40CrNi2Mo and other models! <>
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40cr is an alloy structural steel!
Pro, this is a steel grade that belongs to the Chinese GB standard, and its main components are carbon, chromium, manganese, etc., of which the chromium content is. 40cr steel is characterized by high hardness, good wear resistance, adjustable strength and toughness, good processing performance, quenching, tempering and normalizing treatment, suitable for making various mechanical parts and gears, shafts, etc. used under high loads. Common 40Cr steel materials also leak next to them, including 40CrNiMoa, 40CrNi2Mo and other models!
Exercise does look at the physique, look at the age, if you are an aunt in your 40s, then you should do some simple fitness exercises, such as walking, jogging, or aerobics are very good, depending on your interests and personal free time to adjust yourself, generally want to **, keep 1 hour a day to jog is very good, and then it is diet, to ensure that the equipment to eat less and more meals is the best, it should be noted that dinner should be selected lighter, Good for sleeping at night and good for **.
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