These martensitic stainless steel balls, which can be tempered, offer excellent tenacity and increased resistance to corrosion and wear. They are provided in a state of passivity, ensuring their longevity and reliability. With over 40 years of expertise, Marteau-Lemarie guarantees you a stock available in France for fast delivery.
Chemical composition of AISI 420A/420B stainless steel ball
| Element | type | C | If | Mn | P | S | Cr |
|---|---|---|---|---|---|---|---|
| % | 420A | 0,16-0,25 | 1.00 max | 1.50 max | 0.040 max | 0.030 max | 12,00-14,00 |
Physical characteristics of AISI 420A/420B stainless steel ball
| Ownership | Value | Unit |
|---|---|---|
| Density | 7.73 | g/cm3 |
| Young Module | 195 | GPA |
| Thermal expansion coefficient | 10.2 (DT=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 27.4 | W/m·K |
| Electrical resistivity | 680 | × 10 - 9 D·m |
| Specific heat | 450 | J/kg·K |
| Relative magnetic permeability | > 600 | — |
| Magnetic behaviour | Not soaked | — |
Hardness and mechanical strength of AISI 420A/420B stainless steel ball
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 48-58 | HRC |
| Tensile failure load | 1700-1900 | MPa |
| Tensile failure load | 250-275 | psix10^3 |
| Exercise temperatures | 0/400 | ° C |
| Exercise temperatures | 32/752 | °F |
Available diameters and grades for AISI 420A/420B stainless steel ball
| Parameter | Value |
|---|---|
| Minimum diameter | 0.3 mm — 1/64′′ |
| Maximum diameter | 300 mm — 12′′ |
| Grades available | See International Standards |
| Precision standards | ISO 3290-1 / DIN 5401 / AFBMA |
Corrosion resistance of AISI 420A/420B stainless steel ball
AISI 420A/420B steels have corrosion resistance similar to that of AISI 420C steel. The balls of these materials are resistant in water, steam, oil and gasoline.
International standards for AISI 420A/420B stainless steel ball
| ITA | USA (AISI) | DIN (GER) | AFNOR (FRA) | UK | GOST (RUS) | GB (CHN) | JIS (JPN) |
|---|---|---|---|---|---|---|---|
| X20Cr13 | 420A | 1.4021 | Z 20 C 13 | 420 S 37 | 20 Kh 13 | 2Cr13 | 420 J1 |
Applications of AISI 420A/420B stainless steel ball
Applications similar to those of AISI 420C steel beads, but requiring slightly lower hardness and wear resistance.
