Forged Alloy Steel Round Bar AISI 4140, 4340, 8620, 4320
1: AISI 4140 steel introduction
AISI 4140 steel from the material classification, belongs to the plastic mold steel in mold steel, has good mechanical properties and machinability, the application is quite extensive, there are mainly two types of material plate and round rod, plate for mold processing and production, round rod for mechanical direct processing parts, has been recognized by the industry.
2: AISI 4140 Steel equivalent
| EU |
USA |
Germany |
Japan |
France |
England |
Italy |
Spain |
China |
Sweden |
Finland |
Russia |
Inter |
| EN |
- |
DIN,WNr |
JIS |
AFNOR |
BS |
UNI |
UNE |
GB |
SS |
SFS |
GOST |
ISO |
| 42CrMo4 (1.7225) |
4140 |
42CrMo4 |
SCM440H |
42CD4 |
708M40 |
42CrMo4 |
40CrMo4 |
42CrMo |
2244 |
42CrMo4 |
35KHM |
42CrMo4 |
| 4142 |
|
|
|
CFS11 |
|
F1252 |
|
|
|
38KHM |
|
3: AISI 4140 steel chemical composition
| C |
Si |
Mn |
P |
S |
Cr |
Mo |
| 0.38 - 0.45 |
max 0.4 |
0.6 - 0.9 |
max 0.025 |
0.02 - 0.04 |
0.9 - 1.2 |
0.15 - 0.3 |
4: AISI 4140 steel mechanical properties(for guidance only)
| Nominal diameter (mm): |
to 16 |
16 - 40 |
40 - 100 |
100 - 160 |
160 - 250 |
|
| Rm - Tensile strength (MPa) (+QT) |
1100-1300 |
1000-1200 |
900-1100 |
800-950 |
750-900 |
|
| Rm - Tensile strength (MPa) (+AC) |
630 |
| 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 |
|
Re - Upper yield strength or
Rp0.2 - 0.2% proof strength (MPa) (+QT) |
900 |
750 |
650 |
550 |
500 |
| 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 |
|
| Z - Reduction in cross section on fracture (%) (+AC) |
58 |
| Brinell hardness (HBW): (+S) |
255 |
| Brinell hardness (HBW): (+A) |
241 |
5: steel overviews
| Size |
Round |
Dia 6-1200mm |
| Plate/Flat/Block |
Thickness
6mm-500mm |
Width
20mm-1000mm |
| Heat treatment |
Normalized ; Annealed ; Quenched ; Tempered |
| Surface condition |
Black; Peeled; Polished; Machined; Grinded; Turned; Milled |
| Delivery condition |
Forged; Hot rolled; Cold drawn |
| Test |
Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. |
| Payment terms |
T/T;L/C;/Money gram/ Paypal |
| Trade terms |
FOB; CIF; CNF |
| Delivery time |
20-25 days |
| Application |
4140 used for Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls, Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts. |
6: Delivery condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.
FAQ:
Q: Where is your company ?
A: Our company located in liaocheng , shandong provice of China.
Q: Are you trading company or manufacturer?
A: we are manufacturer.
Q: How long is your delivery time?
A: Generally is 5-7 working days of goods in stock, or 10-20 days if goods are not in stock, it is according to quantitiy.
Q: Do you provide samples? is it free or extra?
A: Yes, we could offer the sample for free charge.but the customers have to pay the sample courier cost.
Q:. What kind of terms of payment?
A: T/T, L/C,Western Union Alipay,Cash are available.
Q: What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.
Q. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q: How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.
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