41Cr4 / 5140/40Cr round bar steel hot forged , forged steel bar,
Small MOQ
1.Application:
Used to manufacture medium speed and medium load parts after
quenched and tempered, such as gear, shaft, worm, spline shaft,
centre sleeve, etc.
Used to manufacture high hardness surface and wear resistance parts
after high frequency case hardening and tempered, such as gear,
main shaft, bent axle, mandrel, sleeve, pin, connecting rod, screw,
nut, etc.
Used to manufacture high load and medium speed impact parts after
quendced and medium temperature tempered, such as pump rotor,
slider block, main shaft, lantern ring, etc.
Used to manufacture high load, low speed impact and wear resistance
parts after quenched and low temperature tempered, such as shaft,
main shaft, worm, lantern ring, etc.
Used to manufacture big size and high low-temperature impact
toughness driving parts after carbonitriding, such as shaft, gear,
etc.
| Material: | 41Cr4 / 5140/40Cr round bar steel hot forged , forged steel bar,
Small MOQ |
| Diameter: | 80mm-1200mm |
| Length: | 1000mm-12000mm Straightness: 3mm/M max |
| Process: | EAF + LF + VD + Forged + Heat Treatment (optional) |
| Delivery condition: | Hot forged +Rough machined (black surface after Q/T)+ Turned
(optional) |
| Delivery Time: | 10-45 days |
| MOQ: | 2-3 tons |
| Heat treatment: | Normalized / Annealed / Quenched / tempered |
| Technical Data: | According to the customer's requirement of Chemical Composition,
Physical Properties and Mechanical Testing |
| Test: | Ultrasonic test according to SEP 1921-84 G3 C/c |
| Marking: | Grade, heat NO. length will be stamped one each bar with required
color |
| Payment: | 30% advance by TT; Balance pay before the shipment against shipping
documents or irrevocable LC at sight |
| Application: | Statically and dynamically stressed components for vehicles,
engines and machines. For parts of larger cross-sections,
crankshafts, gears. |
2, Chemical Composition
| C | Si | Mn | P | S | Cr |
| 0.38 - 0.45 | max 0.4 | 0.6 - 0.9 | max 0.035 | max 0.035 | 0.9 - 1.2 |
3,Properties:
| Nominal diameter (mm): | to 16 | 16 - 40 | 40 - 100 |
|
| Rm - Tensile strength (MPa) (+QT) | 1000-1200 | 900-1100 | 800-950 |
| Nominal thickness (mm): | to 8 | 8 - 20 | 20 - 50 |
|
| Rm - Tensile strength (MPa) (+QT) | 1000 | 900 | 800 |
| Nominal diameter(mm): or for flat products thickness: to 8; 8-20;
20-60; | to 16 | 16 - 40 | 40 - 100 |
|
Re - Upper yield strength or
Rp0.2 - 0.2% proof strength (MPa) (+QT) | 800 | 660 | 560 |
| Temperature ° C | +20 |
|
| KV - Impact energy (J) (+QT) | 30-35 |
| Temperature ° C | +20 |
|
| KV - Impact energy (J) transverse, (+QT) | 22 |
| Nominal thickness (mm): | to 16 | 16 - 40 | 40 - 100 |
|
| A - Min. elongation Lo = 5,65 √ So (%) (+QT), round products | 11 | 12 | 14 |
| Nominal diameter (mm): or for flat products thickness: to 8; 8-20;
20-60; | to 16 | 16 - 40 | 40 - 100 |
|
| Z - Reduction in cross section on fracture (%) (+QT) | 30 | 35 | 40 |
| Brinell hardness (HBW): (+S) | 255 |
| Brinell hardness (HBW): (+A) | 241 |
4. Related Steel grades:
USA: AISI 5140,ASTM 5140 ,
JIS: JIS SCr440 JIS(SCr4),
GB: 40Cr
