20CrNiMo Alloy steel stockholders and suppliers from china. And OTAI SPECIAL STEEL Supply in GB 20CrNiMo steel round bar, plate, sheet, square bar, flat bar, pipe since 2007.

GB 20CrNiMo alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, and it belong to the high quality low carbon, low chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardenss is 28-34 HRC. GB 20CrNiMo steel Annealing delivery hardenss less than 250HB.

GB 20CrNiMo Alloy structural steel properties is a Nickel chromium molybdenum alloy steel specification. 20CrNiMo With a lower carbon content range, So GB 20CrNiMo steel have good weldability.

steel bar

Related Specifications ASTM A29/A29M DIN EN 10083/3 JIS G4053 GB GB/T 3077

Form of Supply

GB 20CrNiMo Alloy steel, we can supply the round bar, steel flat bar, plate, hexagonal steel bar and steel square block. GB 20CrNiMo steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces. 20CrNiMo alloy steel Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

Chemical composition

C(％) 0.17～0.23 Si(％) 0.17～0.37 Mn(％) 0.60～0.95 P(％) ≤0.035
S(％) ≤0.035 Cr(％) 0.40～0.70 Mo(％) 0.20～0.30 Ni(％) 0.35～0.75

Equivalent Of 5160 alloy Spring Steel

USA Germany China Japan France England Italy Poland ISO Austria Sweden Spain
ASTM/AISI/UNS/SAE DIN,WNr GB GB AFNOR BS UNI PN ISO ONORM SS UNE
8620 / G86200  21NiCrMo2/ 1.6523 20CrNiMo SNCM220 20NCD2 805M20  20NiCrMo2

Heat treatment Related

  • Annealing of 20CrNiMo Alloy structural steel

Slowly heated to 850 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. The 20CrNiMo alloy steel will get MAX 250 HB （Brinell hardness）.

  • Hardening of 20CrNiMo Alloy structural steel

Heated slowly to 880-920°C, Then after adequate soaking at this temperature quench in oil. Temper as soon as tools reach room temperature.

Mechanical Properties

The mechanical properties of annealed GB 20CrNiMo alloy steel are outlined in the table below

Tensile Yield Bulk modulus Shear modulus Poisson’s ratio Izod Impact
KSI KSI KSI KSI ft.lb
76900 55800 20300 11600 0.27-0.30 84.8

 

Applications

GB 20CrNiMo steel is widely used for a variety of applications in the used in the automotive and engineering industries for toolholders and other such components. Typical applications such as valve bodies, pumps and fittings, Shaft, the high load of wheel, bolts, double-headed bolts, gears, etc

Regular size and Tolerance

Steel round bar: Diameter Ø 5mm – 3000mm

Steel plate: Thickness 5mm – 3000mm x Width 100mm – 3500mm

Steel Hexagonal bar: Hex 5mm – 105mm

Others 20CrNiMo have not specified size, so please contact our experienced sales team.

Processing

GB 20CrNiMo alloy steel round bar and flat sections can be cut to your required sizes. Furthermore, 20CrNiMo alloy steel ground bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. Moreover, GB 20CrNiMo steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Please contact our experienced sales team to help you with your 20CrNiMo alloy steel questionsadn enquiry by Email or Telphone. Your questions will be reply in 24 hours.

OTAI SPECIAL STEEL CO., LTD

Email: jack@otaisteel.com   TEL: 0086-769-33232622   FAX: 0086-769-88705839