25CrMoS4 / 1.7213 Steel
25CrMoS4 / 1.7213 Steel Manufacturer and Exporter,supplied with round,square,flat,block,and shaft etc. 25CrMoS4 / 1.7213 Steel is defined as a low alloy steel which contains 1%Cr and 0.2%Mo as strengthening alloy elements.it offers good strength,toughness, corrosion resistance and machinability.Compared with AISI 4140,It has lower carbon,0.28-0.33%,so it can be welded easily. 25CrMoS4 / 1.7213 Steel is commonly supplied in the hardened and tempered condition with a hardness range 207-235HB.
25CrMoS4 / 1.7213 Steel Supply Form & Size & Tolerance
Supply Form | Size(mm) | Process | Tolerance | |
Round | Φ6-Φ100 | Cold Drawn | Bright/Black | Best H11 |
Φ16-Φ350 | Hot Rolled | Black | -0/+1mm | |
Peeled/ground | Best H11 | |||
Φ90-Φ1000 | Hot Forged | Black | -0/+5mm | |
Rough Turned | -0/+3mm | |||
Flat/Square/Block | Thickness :120-800 | Hot Forged | Black | -0/+8mm |
Width:120-1500 | Rough Machined | -0/+3mm |
Remark:Tolerance can be customized as per requests
Chemical Composition per EN 10083-3
GRADE | NUMBER | C | Si | Mn | P | S | Cr | Mo |
25CrMoS4 | 1.7213 | 0.22-0.29 | ≤ 0.40 | 0.60-0.90 | ≤ 0.025 | 0.02-0.04 | 0.90-1.20 | 0.15-0.30 |
25CrMoS4 / 1.7213 Steel Physical Property
Density g/cm3 | 7.85 |
Melting point °C | 1432 |
Poisson’s ratio | 0.27-0.30 |
Machinability (AISI 1212 as 100% machinability) | 70% |
Specific Gravity | 7.8 |
Thermal conductivity W/(m.K) | 46 |
Modulus of Elasticity Tension | 29 |
25CrMoS4 / 1.7213 Steel Mechanical Property
Tensile Strength Mpa | Yield Strength Mpa | Elongation % | Hardness HBW | Impact Charpy-V, -18ºC,J | |
60K | ≥ 586 | ≥ 414 | ≥ 18 | 174-237 | ≥ 42 |
75K | ≥ 655 | ≥ 517 | ≥ 17 | 197-235 | ≥ 42 |
25CrMoS4 / 1.7213 Steel Forging
Forging temperature of 25CrMoS4 / 1.7213 Steel should be carried out between 950℃-1200℃,The lower the forging-ending temperature ,the finer the grain size .Hold suitable time for the steel to be uinformly heated before forge, but don’t forge below 950℃.25CrMoS4 / 1.7213 Steel should be cooled as slowly as possible after forged.
25CrMoS4 / 1.7213 Steel Normalizing
Normalizing is used to refine the structure of forgings that might have cooled non-uniformly after forged,and considered as a conditioning treatment before final heat treatment.Normalizing temperature for 25CrMoS4 / 1.7213 Steel should be carried out between 880℃-900℃. hold suitable time for the steel to be uniformly heated to complete the ferrite to austenite transformation.Cool in still air.
25CrMoS4 / 1.7213 Steel Annealing
25CrMoS4 / 1.7213 Steel can be annealed to relieve stress after forging ,and obtain a good structure suitable for machining,Annealing temperature should be carried out between 800℃-850℃, hold suitable time for the steel to be heated uniformly. Cool slowly in the furnace.
25CrMoS4 / 1.7213 Steel Hardening
This heat treatment will obtain martensite structure after quenched,it will increase the surface hardness and strength.25CrMoS4 / 1.7213 Steel should be carried out between 870℃-890℃, hold suitable time for the steel to be thoroughly heated, then quench in oil, or water.Tempering should be followed immediately after quenched.
25CrMoS4 / 1.7213 Steel Tempering
Tempering is usually carried out to relieve stresses from the hardening process, and will optimize hardness and mechanical properties. The actual tempering temperature will be chosen to meet the required properties.Heat the 25CrMoS4 / 1.7213 Steel carefully to a suitable temperature ,usually between 400℃-570℃, soak at the temperature for 2 hours per 25mm of ruling section, then cool in air.The lower the tempering temperature the greater the strength. However, Tempering between 250-375°C is not advised as tempering within this range will seriously reduce the impact value.
25CrMoS4 / 1.7213 Steel Application
25CrMoS4 / 1.7213 Steel finds many applications as forgings for the aerospace,oil and gas,automotive, agricultural and defense industries etc.
Typical applications for 25CrMoS4 / 1.7213 Steel uses include:forged valve bodies, pumps,Aircraft engine mounts,Welded tubing,fittings,Hydraulic tools,etc
Page Contents
- 25CrMoS4 / 1.7213 Steel Supply Form & Size & Tolerance
- Chemical Composition per EN 10083-3
- 25CrMoS4 / 1.7213 Steel Physical Property
- 25CrMoS4 / 1.7213 Steel Mechanical Property
- 25CrMoS4 / 1.7213 Steel Forging
- 25CrMoS4 / 1.7213 Steel Normalizing
- 25CrMoS4 / 1.7213 Steel Annealing
- 25CrMoS4 / 1.7213 Steel Hardening
- 25CrMoS4 / 1.7213 Steel Tempering
- 25CrMoS4 / 1.7213 Steel Application