Straight Pipes With Ceramic Lining
Alumina Ceramic Lined Straight Pipes prevents the pipes from wear and erosion.
42CrMo steel bar is a type of alloy steel that contains chromium and molybdenum as key elements.
42CrMo steel (approximately US grade AISI-4140) belongs to low-alloy medium carbon steel and also belongs to ultra-high-strength steel.
42Cr2Mo steel is a super high strength steel with high strength and toughness, good hardenability, no obvious temper brittleness, small deformation during quenching, high fatigue limit and multiple impact resistance after quenching and tempering, good impact toughness at low temperature, high creep strength and endurance strength at high temperature. Surface hardening after quenching and tempering is usually used as heat treatment scheme for this steel. Suitable for manufacturing large and medium-sized plastic moulds requiring certain strength and toughness.
| Country / Region | China | EU | Germany | Japan | France | England | USA |
|---|---|---|---|---|---|---|---|
| Standard | GB | EN | DIN, WNr | JIS | AFNOR | BS | – |
| Grade | 42CrMo | 42CrMo4 (1.7225) | 42CrMo4 | SCM440H | 42CD4 | 708M40 CFS11 | 4140 4142 |
| C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| 0.38 to 0.45 | 0.17 to 0.37 | 0.50 to 0.80 | ≤ 0.030 | ≤ 0.030 | 0.90 to 1.20 | 0.15 to 0.25 |
Chromium, nickel, and molybdenum are the major alloying elements in 40CrNiMoA, and their content in the steel determines its high strength, toughness and hardenability. In addition, low levels of carbon, silicon, manganese, phosphorus, and sulfur also play a role in improving properties such as cold working capacity and weldability.
40CrNiMoA is a commonly used alloy steel in various industries, such as heavy machinery, automotive, aircraft, and shipbuilding, for manufacturing high-strength and durable components like bearings, gears, hydraulic cylinders, and more.
| Mechanical Property | Value |
|---|---|
| Yield strength | ≥ 930 MPa |
| Tensile strength | ≥ 1080 MPa |
| Elongation | ≥12% |
| Rate of reduction in area | ≥45% |
| Impact absorbing energy | ≥ 63 J |
| Material Brinell hardness (Annealed or high temperature tempered steel rod) | ≤229 |
| Sample diameter | 25mm |
| Critical point | Ac1 | Ac3 | Ms |
|---|---|---|---|
| Temperature/℃ | 730 | 800 | 310 |
| Temperature/℃ | 20~100 | 20~200 | 20~300 | 20~400 | 20~500 | 20~600 |
|---|---|---|---|---|---|---|
| Expansion coefficient/℃-1 | 11.1×10-6K | 12.1×10-6K | 12.9×10-6K | 13.5×10-6K | 13.9×10-6K | 14.1×10-6K |
| Temperature/℃ | 20 | 300 | 400 | 500 | 600 |
|---|---|---|---|---|---|
| Coefficient of thermal conductivity | 210000MPa | 185000MPa | 175000MPa | 165000MPa | 155000MPa |
High strength and hardenability. Good toughness, small deformation during quenching. High creep strength and lasting strength at high temperature.
| Product | Size and Tolerance |
|---|---|
| Round Bar | Diameter(mm): 6-800mm,Length: 1000-9000mm or custom size |
| Plate/Flat/Block | Thickness: 6mm-500mm, Width: 20mm-1000mm or custom size |
| Tolerance | ±1%，Thickness: +/-0.02mm, Width:+/-2mm |
Annealing annealing No.1 “annealing at 760 + 10 C, furnace cooling to 400 air cooling. HB220-230
Normalize No. 4 860 (+10 C) and discharge air-cooled.
Quenching quenching + tempering No. 5 840 (+10 (+10 (+10), (depending on the complexity of product shape), tempering 680-700 degrees. HB<217
The main difference is 42CrMo4 is EN standard, 42CrMo is China GB standard. P, V and S element is a little different each other, machinery property is similar.
42CrMo4 is from European standard-EN10083, 42CrMo4 is a kind of alloy steel with high hardenability, good toughness and small deformation during quenching. It has high creep strength and endurance strength at high temperature.
42CrMo is from China GB/T standard steel grade, it is a medium carbon alloy structural steel with good mechanical properties, good hardenability and wide application. In the machinery industry, it is often used to manufacture gears, connecting rods, high strength bolts and other important parts. China factory create 42CrMo follow SAE 4140 steel standard.The difference is below:
Based on the standard:
42CrMo4 is from EN10083 standard, which come from different standards, 42CrMo is from China GB/T 3077 alloy structural steel standard.
Chemical composition:
The chemical constituents of 42CrMo4 and 42CrMo are shown in Table 1 and Table 2.
Table 1:
Tips: touch the table(form) and scroll left and right to see the whole table(form) on phone screen.
| Composition | C | Si | Mn | S | P | Mo | Cr | Ni |
|---|---|---|---|---|---|---|---|---|
| 42CrMo4 | 0.38-0.45 | ≤0.40 | 0.6-0.9 | ≤0.035 | ≤0.035 | 0.15-0.30 | 0.90-1.20 | ≤0.40 |
| 42CrMo | 0.38-0.45 | 0.17-0.45 | 0.5-0.8 | ≤0.04 | ≤0.035 | 0.15-0.25 | 0.90-1.20 |
Table 2:
Tips: touch the table(form) and scroll left and right to see the whole table(form) on phone screen.
| Composition | C | Si | Mn | S | P | Mo | Cr | Ni |
|---|---|---|---|---|---|---|---|---|
| 42CrMo | 0.38-0.45 | 0.17-0.45 | 0.5-0.8 | ≤0.04 | ≤0.035 | 0.15-0.25 | 0.90-1.20 | |
| Normal Quality | 0.38-0.45 | 0.17-0.45 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.15-0.25 | 0.90-1.20 | |
| High Quality | 0.38-0.45 | 0.17-0.45 | 0.5-0.8 | ≤0.025 | ≤0.025 | 0.15-0.25 | 0.90-1.20 | |
| Extra High Quality | 0.38-0.45 | 0.17-0.45 | 0.5-0.8 | ≤0.015 | ≤0.025 | 0.15-0.25 | 0.90-1.20 |
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
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Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
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