1.7218 30XMA

 

This grade is medium-carbon, chromium-molybdenum heat treatable steel. Available as hot worked and cold finished bar and seamless tube, this grade is intended for general purpose applications. Variations in heat treatment can obtain a broad range of strength and toughness. This steel has good hardenability, strength, wear resistance, toughness, and ductility. In the heat treated condition, they offer good strength and toughness for moderately stressed parts. This grade is available in forging quality, aircraft quality, and premium aircraft quality steel.

Standard Designation Grade, Class,

Type, Symbol or Name

Steel

Number

UNS Number Product

Form/Heat

Treatment

Thickness Yield Strength, min Tensile Strength, min Elongation, min, % Other
t, mm t, in. N/mm2 or MPa ksi N/mm2 or MPa ksi
EN 10250-3:1999 25CrMo4 1.7218 — QT ≤ 70 — 450 — 700 — 15 50 J at RT
70 < t ≤ 160 — 400 — 650 — 17 L; 13 T L: 45 J at RT T: 27 J at RT
160 < t ≤ 330 — 380 — 600 — 18 L; 14 T L: 38 J at RT T: 22 J at RT

 

Composition:

 

%C %Si %Mn %P %S %Cr %Mo %Ni  %Others
0,22-0,29 ≤0,40 0,60-0,90 0,035 0,035 0,90-1,20 0,15-0,30 – –

 
Hot working:

Forging temperature range: 1230-850℃
 
Note: Heat to 1230 ℃. Do not forge below 850.
 
Heat treatment:

Soft annealing ℃ HB 30-soft annealed Normalizing ℃ Hardening temperature for quenching in Water ℃ Hardening temperature for quenching in Oil ℃ Tempering temperature ℃
680-720 212 860-900 840-870 850-880 540-680

 

Main application:

Bushes, arbors, control components, links
 
Shape of product:

Round, flat, step shape, ring, disc, shaft, other shape depend on customer needs