Product Description
AISI 4130 75K P+X Alloy Steel
Introduce
AISI 4130 75K, PSL 3, API 6A Standards, Temperature Class P+X, NACE MR0175:2015
Chemical Composition
| Grade | C | Mn | Cr | Mo | Si | P | S | Ni | Cu | V | H max. ppm |
| Min. | 0.280 | 0.400 | 0.800 | 0.150 | 0.150 | - | - | - | - | - | - |
| Max. | 0.330 | 0.600 | 1.100 | 0.250 | 0.350 | 0.025 | 0.025 | 0.350 | 0.350 | 0.300 | 2.000 |
Heat Treatment
| Normalizing temperature | Time | Austenizing temperature | Time | Tempering temperature | Time |
| Min. 1620ºF (899ºC) | Min. 60 minutes | 1575 - 1625ºF (857 - 885ºC) | Min. 60 minutes | Min. 1238ºF (670ºC) | Min. 60 minutes |
Oil or Polymer or Water. For Water Quenching, the temperature of water shall not exceed 38ºC (100ºF) at start of quench. For bath-type quenching, the temperature of water shall not exceed 49ºC(120ºF) at any time during the quench cycle.
Mechanical Properties
as per ASTM E21-20 for P+X Grade
| Yield strength minimum (0.2%) | Tensile strength minimum | Elongation in 2" (minimum) | Reduction Area (minimum) |
| 75 ksi (517MPa) | 95 ksi (655 MPa) | 18% | 35% |
1.What is a steel round bar?
Round bar is a steel bar with a smooth surface which is used for construction that does not request high-strength reinforced concrete works. It is widely used on beam and column stirrups, pipelines, roads, small and medium-sized projects.
2.What are the 4 types of steel?
The four main types of steel include carbon steel, stainless steel, alloy steel, and tool steel. Learn how the different kinds of steel are categorized and how each type can work for your project requirements
3.What is the difference between a round bar and a rebar?
Round steel and other types of rebars, such as deformed bars and square bars, differ in their shape, surface texture, and mechanical properties. Shape: Round steel bars are cylindrical in shape, while deformed bars have ridges or deformations on their surface that provide better grip and bonding with concrete.
4.What is 4140 round bar?
Alloy Steel Round Bar 4140 is a round shaped bar of oil-hardening, chromium-molybdenum 4140 steel. It has good strength and wear resistance, excellent toughness and ductility. 4140 Alloy steel can resist stress and creep at prolonged high temperatures (up to 1000°F).
5.How strong is a round bar?
Round Bars: Round bars handle compressive loads very well because their shape helps distribute stress evenly. This makes them especially good for applications where the pressure is centred, as it helps them resist bending or deforming under heavy loads.