Basic Info.
Product Description
Free Cutting 42CrMo4/ 42CrMo/ 4140/ Flat Bar/Steel Block/Round Bar Plastic Mold Steel
4140 Steel Block and Flat, A or Q+T
Equivalence
| AISI/SAE | DIN/W.Nr | JIS | GB | ||||||||
| 4140 | 42CrMo4 | SCM440 | 42CrMo | ||||||||
| 42CrMoS4 | |||||||||||
| 1.7225 |
Chemical Composition (%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | ||||||||
| 42CrMo4 1.7225 | 0.38 | ≤ | 0.60 | ≤ | ≤ | 0.90 | 0.15 | ||||||||
| 0.45 | 0.40 | 0.90 | 0.035 | 0.035 | 1.20 | 0.30 | |||||||||
| 42CrMoS4 | 0.38 | ≤ | 0.60 | ≤ | 0.020 | 0.90 | 0.15 | ||||||||
| 0.45 | 0.40 | 0.90 | 0.035 | 0.040 | 1.20 | 0.30 | |||||||||
| 4140 | 0.38 | 0.15 | 0.75 | ≤ | ≤ | 0.80 | 0.15 | ||||||||
| 0.43 | 0.35 | 1.00 | 0.035 | 0.040 | 1.10 | 0.25 | |||||||||
| SCM440 | 0.38 | 0.15 | 0.60 | ≤ | ≤ | 0.90 | 0.15 | ||||||||
| 0.43 | 0.35 | 0.85 | 0.035 | 0.040 | 1.20 | 0.30 | |||||||||
| 42CrMo | 0.38 | 0.17 | 0.50 | ≤ | ≤ | 0.90 | 0.15 | ||||||||
| 0.45 | 0.37 | 0.80 | 0.035 | 0.035 | 1.20 | 0.25 |
Dimensions
| Hot Rolled | Forged | Cold Drawn | |||||||||
| Diameter(mm) | 10-260 | 150-1500 | 2.5-70 | ||||||||
| Length(mm) | 4000-10000 | 3000-10000 | 4000-10000 | ||||||||
Forging Technique
| Heat Temperature | Start Forging Temperature | Finish Forging Temperature | Cooling Method | ||||||||
| 1150-1200ºC | 1130-1180ºC | ≥850ºC | Slow Cooling for Φ>50mm | ||||||||
Delivery Condition
EAF+LF+VD, Hot Rolled, Forged and Cold Drawn, Black surface or Machined (Peeled, Turned, Grinded),
Untreated or Annealed or Q+T, UT 100% Passed
Characteristics
1. Ultrahigh strength steel with high intensity and toughness.
2. Good harden ability, High fatigue limit and capability of impact resistance after Q+T.
3. No obvious temper brittleness.
Applications
1. For making crucial mechanical parts with high intensity and large sections, such as shaft, gear and connecting rod.
2. For making large and medium size of plastic mold.
What we can offer?
We offer a wide range of steel products in a wide variety of dimensions and executions, acc.to the common international specifications or customerized.
Machining and heat treatment are available.
Also, we advise you in choosing the right materials.
Shape Available
Solid round bar
Flat bar
Square bar
Hexagon bar
Block
Plate
Sheet
Wire rod
Strip
| AISI | DIN | JIS | Stock | Application |
Hot Work Tool Steel | H11 | 1.2343 | SKD6 | √ | Die Casting Dies,Extrusion Dies, Hammer Dies, |
H13 | 1.2344 | SKD61 | √ | ||
H10 | 1.2365 | SKD7 |
| ||
-- | 1.2367 | -- |
| ||
L6 | 1.2714 / 1.2713 | SKT4 | √ | ||
H12 | 1.2606 | SKD62 |
| ||
H21 | 1.2581 | SKD5 | √ | ||
Cold Work Tool Steel | D3 | 1.2080 | SKD1 | √ | Cutting Tools, Punching Tools, Shear Bladers, Reamers, Thread Rolling Dies, Calipers, Sockets etc. |
-- | 1.2601 | ~SKD11 | √ | ||
D2 | 1.2379 | ~SKD11 | √ | ||
-- | 1.2379 MOD | DC53 (Daido) | √ | ||
D6 | 1.2436 | -- |
| ||
O1 | 1.2510 | SKS3 | √ | ||
O2 | 1.2842 | -- |
| ||
A2 | 1.2363 | SKD12 |
| ||
S1 | 1.2550 | -- |
| ||
S7 | 1.2357 | -- |
| ||
-- | 1.2767 | SKT6 |
| ||
L2 | 1.2210 | -- |
| ||
Plastic | P20 | 1.2311 | -- | √ | Mold Base, Core & Cavity, Bumper Mold etc. |
P20+Ni | 1.2738 | -- | √ | ||
P20+S | 1.2312 | -- | √ | ||
-- | 1.2316 | -- |
| ||
420 | 1.2083 | SUS420J2 | √ | ||
-- | -- | NAK80 (Daido) | √ | ||
Alloy Steel | 4120 | 25CrMo4 / 1.7218 | SCM420 |
| Shafts, Gears, Drillers, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Crankshafts, Connecting Rods, Came, Couplings etc. |
4135 | 34CrMo4 / 1.7220 | SCM435 |
| ||
4130 | 34CrMo4 / 1.7220 | SCM430 | √ | ||
4140 | 42CrMo4 / 42CrMoS4 / 1.7225 | SCM440 | √ | ||
4142 | 41CrMo4 / 1.7223 | SCM440 |
| ||
4145H | -- | -- |
| ||
4330V | -- | -- |
| ||
4340 | 34CrNiMo6 / 1.6582 | SNCM439 |
| ||
5115 | 16MnCr5 / 16MnCrS5 / 1.7131 |
|
| ||
5120 | 20MnCr5 / 20MnCrS5 / 1.7147 | SMnC420H |
| ||
5140 | 41Cr4 / 41CrS4 / 1.7035 | SCr440 | √ | ||
8620 | 21NiCrMo2 / 1.6523 | SNCM220 |
| ||
8640 | 40NiCrMo2-2 / 1.6546 | SNCM240 |
| ||
-- | 18CrNiMo7-6 / 17CrNiMo6 / 1.6587 | -- |
| ||
9840 | 36CrNiMo4 / 1.6511 | -- |
| ||
E71400 | 41CrAlMo7-10 / 1.8509 | SACM1 |
| ||
-- | 34CrAlNi7 / 1.8550 | -- |
| ||
Bearing Steel | E52100 | 100Cr6 / 1.3505 | SUJ2 | √ | Bearing, Shafts |
-- | 100CrMn6 / 1.3520 | -- |
| ||
-- | 100CrMo7-3 / 1.3536 | -- |
| ||
Spring Steel | 5155 | 55Cr3 / 1.7176 | SUP9 |
| Springs |
6150 | 51CrV4 / 1.8159 | SUP10 |
| ||
9261 | 60CrSi7 / 1.7108 | -- |
| ||
Carbon Steel | 1010 | CK10 / C10E / 1.1121 | S10C |
| Shafts, Chains, Bolts, Nuts, Pins, Suds, Keys, Bites, Came, Couplings etc. |
1020 | C22 / 1.0402 | S20C | √ | ||
1040 | CK40 / C40E / 1.1186 | S40C | √ | ||
1045 | CK45 / C45E / 1.1191 | S45C | √ | ||
1050 | CK50 / C50E / 1.1206 | S50C | √ | ||
1055 | CK55 / C55E / 1.1203 | S55C |
| ||
1064 | CK60 / C60E / 1.1221 | S58C |
| ||
High Speed Tool Steel | M2 | 1.3343 | SKH51 | √ | Reamer, |
M7 | 1.3348 | -- |
| ||
M42 | 1.3247 | SKH59 | √ | ||
M35 | 1.3243 | SKH55 | √ | ||
T1 | 1.3355 | SKH2 |
| ||
T15 | 1.3202 | -- |
| ||
T42 | 1.3207 | SKH57 |
|
Note:
1). √ means we have stoc
2). Delivery Condition:
Smelting: EAF+LF+VD (+ESR)
Making: Hot rolled, Cold rolled, Forged, Cold Drawn
Heat Treatment: Untreated, Annealing, N+T, Q+T
Surface: Black, Peeled, Turned, Milled, Grinded, Polished
Q1: What is Ningbo Ningshing Precision Machinery Group Co., Ltd ?
A1: Ningbo Ningshing Precision Machinery Group Co., Ltd., formerly known as Ningbo Ningshing Special-Steel Group Co., Ltd., is the leading distributor of Special Steel, and also a professional mold base maker in China. Our business involves special steel trading, machining processing, mold base making, heat treatment, CNC machines manufacturing.
Q2: Are you a manufacturer or a trader?
A2: For Special Steel, we are the one of the leading distributors and service center in China. 9 warehouses with over 50,000 tons of regular stock. Our workshop has various kinds of equipments for sawing, milling, grinding, drilling etc.
For mold base, we are a professional manufacturer, with 24 sets of CNC machines, 3 axis and 5 axis, CMM for inspection. We produce medium-large sized mold base for plastic injection mold and die casting die.
Q3: How do you control the quality of steels?
A3: Firstly, we have very close and deep relationship with Chinese Prime Mills, choose supplier carefully, and regard them as the long term business partner. Based on the long term cooperation, we concentrate on special steel business and expand the market step by step. Secondly, we have own technical center which is formed by the experienced engineers and technicians whom ever worked for prime mills. We control the quality in production process, in-out warehouse.
Q4:: Which kind of processing can you do?
A4: We do machining processing like cutting, milling, grinding, turning, peeling, drilling, CNC machining. Meanwhile, we do vacuum heat treatment for die and mold.