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Offer Ability:5 000MT/Per Month GB/T 11251 20Cr hot rolled structure steel plates
GB/T 11251 20Cr hot rolled structure steel plates are widely used to manufacture carburized parts (oil quenching) that have high requirements for core strength, bearing surface wear, section below 30mm, shape is complex and load is small. For example: machine transmission gear, gear shaft, cam, worm, piston pin, claw clutch. For parts with small heat treatment deformation and high resistance, high-frequency surface hardening is needed after carburizing, such as gear whose modulus is less than 3, shaft, spline shaft and so on.
GB/T 11251 20Cr hot rolled structure steel plates can also be used in quenching and tempering condition to manufacture parts with larger working speed and medium impact load.
GB/T 11251 20Cr hot rolled structure steel plates can also be used as low-carbon steel for martensitic quenching, which further increases yield strength and tensile strength of 20Cr steel (about 1.5 ~ 1.7 times).
GB/T 11251 20Cr hot rolled structure steel plates chemical composition:
|
Unified Numeral Code |
Grade |
C |
Si |
Mn |
Cr |
Mo |
Ni |
W |
B |
Al |
Ti |
V |
|
A20202 |
20Cr |
0.18-0.24 |
0.17-0.37 |
0.50-0.80 |
0.70-1.00 |
|
|
|
|
|
|
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GB/T 11251 20Cr hot rolled structure steel plates mechanical properties:
1) The mechanical properties of steel plates delivered in annealed state shall be in accordance with the provisions of the table below.
2) The steel plates delivered in normalizing state, under the condition of elongation comply with the table, the upper limit of tensile strength is allowed to be increased by 50Mpa.
3) The steel plates with thickness above 20mm, when the thickness is increased by 1mm, the elongation is allowed to lower by 0.25% (absolute value) than that of the table, but it should not exceed 2% (absolute value).
|
Unified Numeral Code |
Brand No. |
Tensile Strength [Mpa] |
Elongation [%,min] |
|
A20202 |
20Cr |
400-650 |
20 |
BBN GB/T 11251 20Cr hot rolled structure steel plates are famous for wide application on international market and its excellent performace. Welcome to contact BBN steel to consult and purchase GB/T 11251 20Cr hot rolled alloy steel plates
BBN Steel is specializing in GB/T 11251 20Cr hot rolled structure steel plates which is under GB/T specification.GB/T 11251 20Cr hot rolled structure steel plates has excellent mechanical properties and widely application. Combining above advantages can be supplied the most in line with customer requirements products. Moreover,we will provide cutting, pretreatment, galvanizing, testing, heat treatment services for GB/T 11251 20Cr hot rolled structure steel plates .If you want to known GB/T 11251 20Cr hot rolled structure steel plates more information,welcome to contact with us at any time: [email protected].
1.Additional Condition: UT(Ultrasonic examination), AR(As Hot Rolled only), TMCP(Thermal Mechanical Control Processing), N(Normalized), Q+T(Quenched and Tempered),Z Direction Test(Z15,Z25,Z35), Charpy V-Notch Impact Test, The Third Party Test (such as SGS Test), Coated or Shot Blasting and Painting.
2.Shipping department: a).Book shipping space b).Documents confirmation c).Shipping track d).Shipping case
3.Production control department: a).Technical evaluation b).Production Schedule c).Production Tracking d).Successfully complaint case
4.Quality control: a).Test in mill b).Inspection before Shipment c).Third Party Inspection d).About Package problem e).Quality problem case
5.Customers’ feedback and complaint: a).Quality feedback b).Service feedback c).Complaint d).Case
