JIS SUS420J1 EN 1.4021 AISI 420A Cold Rolled Precision Stainless Steel Strip Coil
JIS SUS420J1 EN 1.4021 AISI 420A Cold Rolled Precision Stainless Steel Strip Coil
Martensitic stainless steels typically contain 12 to 17% chromium and nickel in a range of 0 to 5%.
The low nickel content ( compared to austenitic stainless steels ) offers the secondary advantage of a lower material cost.
They fall into 4 subgroups.
1. Fe-Cr-C steels, there were the first grades put into use and still widely used in engineering
and in wear resistant applications.
2. Ni-bearing grades, in which Ni replaces some of the C. Compared to the previous group,
they offer a higher toughness particularly at low temperatures.
Their higher Chromium content leads to a higher corrosion resistance.
Molybdenulm additions in groups 1 and 2 improve further the corrosion resistance.
3. Precipitation hardening stainless steels, offer the best combination of strength and toughness.
4. Creep resisting steels, with about 11% chromium, differ from subgroup 1 by additions of Co. Nb,
V and B which increases of high temperature strength and creep resistance up to 650℃.
| Group 1 | Group 2 | Group 3 | Group 4 |
|
a. engineering Cr: 10.5~13.0% C: 0.1~0.4% Typical grades: ASTM 410, 420 EN 1.4006, 1.4021, 1.4028, 1.4031, 1.4034
b. wear resistant Cr: 13.0~17.0% C: 0.40~1.00% Typical grades: ASTM 440A/B/C EN 1.4109, 1.4112, 1.4125 |
Cr: 13~17.0% Ni: 2~5.0% C: ＜0.2% Typical grades: ASTM 431, S41500, F6NM, S165M EN 1.4057, 1.4313, 1.4418 |
Cr: 15.0~17.0% Ni: 3.0~5.0% Cu: 3.0~5.0% Nb C: ＜0.1% Typical grades: ASTM S17400, S17700, S15700, S15500, S13800 630, 631, 632 17-4PH, 17-7PH, 15-7Mo, 15-5PH, 13-8Mo EN 1.4542, 1.4568, 1.4574, 1.4545, 1.4534 |
Cr: 10.5~12.0% C: 0.1~0.25% Mo: 0.8~1.2% With Co, Nb, V, B additions Typical grades ASTM 422 EN 1.4913, 1.4923 |
JIS SUS420J1 stainless belongs to Group 1, a very popular martensitic stainless steel that is corrosion
resistant in water and steam.
Chemical composition ( weight % )
| Grade | C | Si | Mn | Cr |
| JIS SUS420J1 = EN 1.4021, DIN X20Cr13 = AISI 420A, UNS S42000 | 0.16~0.25 | 1.00 | 1.00 | 12.00~14.00 |
Typical applications
- Cutting utensils
- Surgical instruments
- Press plates
- Brake discs
- Mechanical parts
- Flanges and valves
Product forms
SUS420J1 stainless hot-rolled strip, cold-rolled strip, slit strip, narrow strip, precision strip steel, cut sheets
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