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20CrMnTi – SAE5120 Medium Hardenability Alloy Carburizing Steel Plate/Coil for Industry

Model NO. 20CrMnTi
Standard ASTM, AISI, GB, JIS, DIN, BS
Technique Hot Rolled
Width 1000-3000mm (1000-2200mm usually used)
Length 1000-12000mm or as your request
Surface Clean, finishing,blasting and painting according to customer requirement

20CrMnTi alloy steel is an alloy structural steel widely used and used in a large amount. It is a carburizing steel and can also be used as a quenched and tempered steel. Its chemical composition and mechanical properties are regulated by the Chinese national standard GB/3077-2015.  

20CrMnTi is equivalent to SAE5120 in United State Standard, JIS SMnC420H in Japan standard, 1.7147 in Europe, GOST:18KHG in Russian standard. 20CrMnTi alloy structural steel carbon content generally does not exceed 0.23%.

20CrMnTi alloy structural steel has the following general characteristics:

(1)Low carbon Content: 20CrMnTi steel plate is Carburizing steel Medium hardenability alloy carburizing steel Plate, which belongs to alloy steel plate. The carbon content in 20CrMnTi is generally not exceed 0.23%, making it a low carbon alloy structural steel suitable for forming processes.

(2) Excellent quenching hardening property: 20CrMnTi steel has high quenching hardness, good strength and toughness, and can withstand large loads.

(3)Good property: high hardenability, hard and wear-resistant surface and tough core after carburizing and quenching, high low temperature impact toughness, medium weldability, good machinability after normalizing

(4) Strong wear resistance: 20CrMnTi steel has high hardness and strength, the surface is not easy to wear, and it can still maintain good performance under high temperature and high pressure conditions.

Content of chemical elements (%)

ingredient

C

Si

Mn

P

S

Cr

Ni

Cu

Mo

Ti

minimum value

0.17

0.17

0.8

1

0.04

maximum

0.23

0.37

1.1

0.035

0.035

1.3

0.3

0.3

0.15

0.1

Mechanical character

Sample
diameterd
(mm)

Heat treatment
 or condition

tensile
strength
σb
Mpa

yield limit
σs
Mpa

Elongation after
breaking or elongationδ(%)

Section shrinkage
ψ(%)

hardness
HBW

Shock absorption
energy KV2J

d=15

Quenching+
tempering

≥1080

≥850

≥10

≥45

≤217

≥55

Application:

20CrMnTi steel has a wide range of applications due to its excellent properties and affordability. Some common applications of 20CrMnTi steel include:

(1) Main application: Widely used as carburized parts, used for shafts, pistons and various special parts of automobiles and aircrafts.

(2)Machined parts: Due to the high strength and strong wear resistance of 20CrMnTi steel, it is suitable for manufacturing mechanical parts such as gears, bearings, and transmission shafts.

(3)It is used to manufacture important parts with a cross-section <30mm that withstand high-speed, medium or heavy loads, impact and friction, such as gears, ring gears, gear shaft crossheads, etc.

(4)Used for important carburized parts with a section below 30mm, bearing high-speed, medium or heavy loads, and subject to impact and friction, such as gears, shafts, ring gears, gear shafts, main shafts of sliding bearings, crossheads, claw clutches, worms, etc.

Content of chemical elements (%)
ingredientCSiMnPSCrNiCuMoTi
minimum value0.170.170.810.04
maximum0.230.371.10.0350.0351.30.30.30.150.1
Mechanical character
Sample
diameterd
(mm)
Heat treatment
 or condition
tensile
strength
σb
Mpa
yield limit
σs
Mpa
Elongation after
breaking or elongationδ(%)
Section shrinkage
ψ(%)
hardness
HBW
Shock absorption
energy KV2J
d=15Quenching+
tempering
≥1080≥850≥10≥45≤217≥55
Chemical Composition:
ElementCSiMnPSCr
Content (%)0.14-0.19max0.41-1.3max0.025max0.0350.8-1.1
Mechanical Properties:
The mechanical properties of annealed DIN 16MnCr5/1.7131 gearing steel (typical for steel) are outlined in the table below
TensileYieldBulk modulusShear modulusPoisson’s ratioThermal conductivity
MPaMpaGpaGpa W/mK
520415 Min140800.27-0.3046.6

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