AISI 8620 Bearing Steel Tube
AISI 8620 alloy Steel with Quenched and Tempered process cold drawn and cold rolled seamless tubes for rod and shaft
Products Description:
AISI 8620 alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardenss is 28-34 HRc. AISI 8620 steel Annealing delivery hardenss less than 250HB.
AISI 8620 Alloy structural steel properties is a Nickel chromium molybdenum alloy steel specification. 8620 With a lower carbon content range, So AISI 8620 alloy steel have good weldability. AISI 8620 Steel is equivalent to Din 21NiCrMo2 | W-Nr 1.6523, GB 20CrNiMo, BS 805M20, NF 20NCD2,JIS SNCM220 Steel. Most applications can replace each others
Related Specifications ASTM A519/DIN EN 10084/JIS G4053 DIN/17210
Chemical composition
| C(％) | 0.18～0.23 | Si(％) | 0.15～0.35 | Mn(％) | 0.70～0.90 | P(％) | ≤0.035 |
| S(％) | ≤0.040 | Cr(％) | 0.40～0.60 | Mo(％) | 0.15～0.25 | Ni(％) | 0.40～0.70 |
Heat treatment Related
- Annealing of 8620 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 8620 alloy steel will get MAX 250 HB (Brinell hardness).
- Hardening of 8620 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 AISI 8620 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
AISI 8620 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
| Cold drawn and Cold rolled bearing tubes tolerance control level | |||
| Outer Diameter | Diameter Tolerance | Outer Diameter | Diameter Tolerance |
| (mm) | (mm) | (mm) | (mm) |
| ≤12.70 | ±0.08 | >50.80～63.5 | ±0.25 |
| 12.7～25.40 | ±0.10 | >63.50～76.20 | ±0.30 |
| >25.4～38.10 | ±0.15 | >76.20～101.60 | ±0.40 |
| >38.1～50.80 | ±0.20 | >101.60～203.20 | ±0.50 |
| Remark:Tolrance on outer diameter and Inner diameter,wall thickness can be specified by customer requested, |
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Delivery Condition: +C, +LC, +SR, +A, +N
Production Size Range:
OD: 10-210mm
WT: 2-30mm
Length: 2-5.8m
Bearing and Gearing Steel Tube Characteristic:
High strength
High-precision
Good Surface Quality
Stable quality
Smooth Roughness
Production Processs:
Seamless Cold Drawn or Seamless Cold Rolled + Heat Treatment or Stress released control
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