42CrMo4 Round Bar Q+T

A close friend who always buy 42CrMo4 Round Bar Q+T from my company,I still remember the beginning of our cooperation.

A close friend who always buy 42CrMo4 Round Bar Q+T from my company,I still remember the beginning of our cooperation. At the beginning of that period,our delivery day of 42CrMo4 Round Bar Q+T is very very slow,around 30days for processing. In a general way,there no Q+T condition in stock,most of them is Hot roll black surface,forged black surface.so we have to take our goods to the heat treatment factory,as the we know the heat treatment factory is stable and have good repitation,but their delivery time is very slow,and the heat treatment fee is also expensive.sometimes I lost the orders of 42CrMo4 Round Bar Q+T because of delivery days,my friend really want to gave me those order,but he can not wait such long time,as most of his orders are so urgent.

The most important is about staff

After a year,finally,we found another heat treatment factory,and their delivery time for us only need 7 days,we gave them a small order for testing,and the hardness was also met our requirement.and we also sent our engineer to check theirmechanical equipment,and the most important is about staff,our enigneer asked a lot of question of technology,their worker are knows the technology well,and some of them are experienced.

Since we have cooperated several times, we have replaced most of the heat treatment work with them, such as Q+T, annealing and normalization.They never let us down.

If you want to know more about 42CrMo4 Round Bar Q+T,please click the link or contact me.

Mechanical properties of steel 42CrMo4 (1.7225)

Nominal diameter (mm):	to 16	16 – 40	40 – 100	100 – 160	160 – 250	250 – 330	330 – 660
Rm – Tensile strength (MPa) (+QT)	1100-1300	1000-1200	900-1100	800-950	750-900	700	600

Nominal thickness (mm):	0.3 – 3
Rm – Tensile strength (MPa) (+A)	620

Rm – Tensile strength (MPa) (+AC)

630

Nominal thickness (mm):	to 8	8 – 20	20 – 50	50 – 80
Rm – Tensile strength (MPa) (+QT)	1100	1000	900	800

Rm – Tensile strength (MPa) (+C)

720

Rm – Tensile strength (MPa) (+LC)

670

Nominal diameter(mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160;	to 16	16 – 40	40 – 100	100 – 160	160 – 330	330 – 660
Re – Upper yield strength or R_p0.2 – 0.2% proof strength (MPa) (+QT)	900	750	650	500-550	460-500	390

Nominal thickness(mm):	0.3 – 3
R_p0.2 0.2% proof strength (MPa) (+A)	480

KV – Impact energy (J) longitud., (+QT)

+20°
30-35

KV – Impact energy (J) transverse, (+QT)

+20°
22

Nominal thickness (mm):	0.3 – 3
A – Min. elongation Lo = 80 mm (%) (+A)	15

A – Min. elongation at fracture (%) transverse, (+QT)

10-14

A – Min. elongation at fracture (%) (+C)

A – Min. elongation at fracture (%) (+LC)

Nominal thickness (mm):	to 16	16 – 40	40 – 100	100 – 160	160 – 250
A – Min. elongation Lo = 5,65 √ So (%) (+QT), round products	10	11	12	13	14

Nominal diameter (mm): or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160;	to 16	16 – 40	40 – 100	100 – 160	160 – 250
Z – Reduction in cross section on fracture (%) (+QT)	40	45	50	50	55