Product Description
AISI 4140 SCM440 EN19 Hot rolled steel round bar AISI 4140 steel is a high alloy austenitic stainless steel. The grade is intended for use under severe corrosive conditions. The steel grade was originally developed to resist corrosion in dilute sulphuric acid. EN 1.7225 is fully austenitic, and is less sensitive to precipitation of ferrite and sigma phase than conventional austenitic grades with high molybdenum content. Due to the combination of relatively high contents of chromium, nickel, molybdenum and copper, EN 1.7225 has good resistance to general corrosion, particulary in dilute sulphuric acid. It is non-magnetic in the annealed condition but may become slightly magnetic as a result of cold-working or welding.
1.Forged Steel Size we can supply:
| Forged Steel Round Bar | Φ85mm~1200mm |
| Forged Square steel Bar: | 150×150-800×800mm |
| Forged Flat Blocks: | (150mm-800mm)*(200mm-800mm) |
| Forged Shaft and Forged Ring | According to Customer's drawing |
2.Inspecting: UT according toSEP1921 C/c, D/d, E/e, A388 or GB/T 6402, Spectral Tested, Microstructure Tested,Hardness Test,Macrostructure Test,
3.Delivery Condition: Forged+black surface Forged+rough machined Forged+rough turned+QT/annealed/normalized
Surface condition: Black; Peeled; Polished; Machined; Grinded; Turned; Milled
4.Manufacture:EAF+LF+VD(Annealed,normalized,Quenched+Tempered,peeled,rough turned).
5.Heat Treatment: Normalized / Annealed / Quenched / tempered (optional)
6.Equivalent Grades
| GB,YB | JIS | DIN(W-Nr.) | BS | NF | |
| 42CrMo | SCM440/(SCM4) | 42CrMo4-1.7225 | 4140 | 708M40/709M40/708A42/EN19 | 42CD4 |
Corrosion resistance Uniform
corrosion Uniform corrosion is characterized by a uniform corrosion of the steel surface in contact with the corrosive medium. Resistance is normally considered good if the corrosion rate is less than 0.1 mm/year. As a result of its high chromium, nickel and molybdenum contents and its alloying with copper, EN 1.7225 is passivated even in reducing environments such as dilute sulphuric acid and formic acid. Its high nickel content contributes towards its relatively low corrosion rate in the active state.
Intercrystalline corrosion
EN 1.7225 has a very low carbon content. This means that there is very little risk of carbide precipitation in connection with ordinary heat treatment and welding. The risk of intercrystalline corrosion after ordinary heat treatment and welding is thereby eliminated.
3.Chemical composition
| ASTM A29/29M | C | Si | Mn | Cr | Mo | P | S |
| 4140 | 0.38~0.43 | 0.15~0.35 | 0.75~1.00 | 0.80~1.10 | 0.15~0.25 | ≤0.035 | ≤0.040 |
| DIN WN-r | C | Si | Mn | Cr | Mo | P | S |
| 1.7225 | 0.38~0.45 | ≤0.40 | 0.60~0.90 | 0.90~1.20 | 0.15~0.30 | ≤0.035 | ≤0.035 |
| GB/T | C | Si | Mn | Cr | Mo | P | S |
| 42CrMo | 0.38~0.45 | 0.17~0.37 | 0.50~0.80 | 0.90~1.20 | 0.15~0.25 | ≤0.030 | ≤0.030 |
| BS | C | Si | Mn | Cr | Mo | P | S |
| 708M40 | 0.36~0.44 | 0.10~0.35 | 0.70~1.00 | 0.90~1.20 | 0.15~0.25 | ≤0.035 | ≤0.035 |
| JIS | C | Si | Mn | Cr | Mo | P | S |
| SCM440 | 0.38~0.43 | 0.15~0.35 | 0.60~0.85 | 0.90~1.20 | 0.15~0.30 | ≤0.030 | ≤0.030 |
4.Heat Treatment for 4140 steel round bars
4140 alloy steel material is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality medium carbon alloy steel, Oil Quenched & Tempered Hardenss is 28-34 HRC.
4140 Annealing delivery hardenss less than 250HB Heat treatment of aisi 4140 steel
They are widely used in industrial & medical equipment, pipeline transportation, building materials, auto parts, food machinery, household appliances, interior decoration, and petroleum, ships, railways, containers and so on. Benefit from good product quality and competitive price, our customers are all over the world, such as USA, Mexico, Russia, Spain, Italy, Brazil, Chile, Peru, South Africa, Egypt, Arabia, UAE, Turkey, Japan, Korea, Bangladesh, etc.
Packing Details:
One bundle including one heat no., one size only.
Bundle weight 2 tons to 4tons.
At least 3-4 metal straps on each bundle to make it strong enought by loading and unloading.
Each bundle should carry label which will show the heat number, size, quantity in pcs, weight , origin or as your requirements.
Terms:
MOQ: one bundle, weight about 2-4tons
Delivery time : 7-10 days for stocks, and 30 days for new production items.
Price term: EXW, FOB, CFR, CIF
Payment term: By TT or LC
FAQ
Q: Are you manufacturer? A: Yes , we are manufacturer. We have our own factory. Q: Can we visit your factory ? A: Welcome to visit. Let us know your schedule in advance, then we can pick you up. Q. What are your main products ? A: Main products are stainless steel and carbon steel for sheets, coils, strips, round/square pipes, bars, channels, beams, angles, etc. Q: How do you control the quality? A: We have gained BV, SGS authentication. We support the third party inspection at any time. Q: Can you arrange the shipment? A: Sure, we have long-term cooperation with the freight forwarder, so we can get more favorable prices. Q: How long is your delivery time? A: Generally it is 5-10 days if the raw materials are in stock. Or it is 10-20 days if the goods are not in stock. It depends. Q: Can we get the some samples? Any charges? A: Yes. Free for samples, only need to pay the freight.
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