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30CrMnSi – GOST 20ХГС Alloy Steel Pipe Krobo Steel

Product Name Alloy Steel Pipe
Material 30CrMnSiA
Outer Diameter(round) 88.9mm
Certification ISO DCDMA
Payment Terms T/T, L/C
Technique Hot Rolled
Standard AISI, ASTM, DIN, JIS, GB

30CrMnSi has high strength and toughness, high hardenability, medium cold deformation plasticity, good machinability, tendency to temper brittleness, and poor transverse impact toughness. The weldability is good, but when the thickness is greater than 3mm, it should be preheated before welding, and it needs to be heat treated in time after welding. Generally used after conditioning. In order to meet different needs, this steel can be tempered at low temperature or high temperature after quenching. Used to manufacture important parts working under high-speed and vibration loads, such as grinding wheel shafts, gears, sprockets, clutches, bushings, bolts, nuts, etc.; also used to manufacture wear-resistant, low-temperature parts and withstand alternating loads Welded components, such as high-pressure blower blades, valve plates, and non-corrosive pipes, etc.

30CrMnSi alloy steel plates Chemical composition (%)

Grade

C

Si

Mn

Cr

30CrMnSi

0.27-0.34

0.90-1.20

0.80-1.10

0.80-1.10

Mechanical Properties(In Quenched & Tempered State)

Tensile
strength
(MPA)

Yield strength
(MPA)

Elongation
(δ5/%)

Reduction in
 Area
 (ψ/%)

Impact  
(J)

Hardness  

≥1080

≥ 835

≥ 10

≥ 45

≥ 39

≤229HBS
(not heat treatment)

30CrMnSi alloy steel plates Application

30CrMnSi alloy steel plates are used to manufacture all kinds of important parts of high load and high speed, such as gear, shaft, clutch, sprocket, wheel shaft, shaft sleeve, bolt, nut and so on. 30CrMnSi steel is also used to make parts with wear resistance and not too high working temperature features, the variable load welded components, such as the blades of high pressure blower, valve plate and so on.

30CrMnSi alloy steel plates Chemical composition (%)
GradeCSiMnCr
30CrMnSi0.27-0.340.90-1.200.80-1.100.80-1.10
Mechanical Properties(In Quenched & Tempered State)
Tensile 
strength
(MPA) 
Yield strength
(MPA)
Elongation
(δ5/%)
Reduction in
 Area
 (ψ/%)
Impact 
(J)
Hardness  
≥1080≥ 835≥ 10≥ 45≥ 39≤229HBS
(not heat treatment)

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