About Alloy
4130 structural steel has high strength and toughness, high hardenability, and the critical hardenable diameter in oil is 15-70mm; the thermal strength of the steel is also good, and it has sufficient high-temperature strength below 500°C, but at 550°C Its strength decreases significantly; when the alloy elements are at the lower limit, the welding is quite good, but when it is close to the upper limit, the weldability is medium, and it needs to be preheated to above 175°C before welding; the machinability of the steel is good, and the plasticity is medium during cold deformation; during heat treatment There is the first type of temper brittleness in the range of 300 to 350°C; there is a tendency to form white spots.
Product Form
AMS 6345 Sheet / Plate, Normalised
AMS 6346 Bar Hardened & Tempered
AMS 6350 Sheet / Plate
AMS 6351 Sheet / Plate
AMS 6370 Bar
AMS 6371 Tube
Chemical Composition
| Weight% | C | Mn | P | S | Si | Cr | Ni | Mo | Cu |
| 4130 Bar/Tube | 0.28 - 0.33 | 0.40-0.60 | 0.025 max | 0.025 max | 0.15 - 0.35 | 0.80-1.10 | 0.25 max | 0.15-0.25 | 0.35 |
| 4130 Sheet/Plate | 0.28 - 0.33 | 0.40 - 0.60 | 0.025 max | 0.025 max | 0.20-0.35 | 0.80-1.10 | - | 0.15 - 0.25 | - |
Property
| Alloy | Condition | Thickness | Tensile Strength ksi | Yield Strength ksi | Elongation | Hardness |
| Tube AMS 6371 | Cold Drawn | - | 95 | 70 | 12 | <25 |
| Bar AMS 6370 | Annealed | - | - | - | - | 29HB Max |
| Bar AMS 6346 | Hardened & Tempered | - | 125 | 100 | 17 | - |
| Sheet AMS 6350 | Annealed | - | - | - | - | <25 HRC |
| Sheet AMS 6345 | Normalize | <0.062" | 95 | 75 | 8 | - |
| Sheet AMS 6345 | Normalize | 0.062" - 0.125" | 95 | 75 | 10 | - |
| Sheet AMS 6345 | Normalize | 0.125" - 0.187" | 95 | 75 | 12 | - |
| Sheet AMS 6345 | Normalize | 0.187" - 0.250" | 90 | 70 | 15 | - |
| Sheet AMS 6345 | Normalize | 0.250" - 0.750" | 90 | 70 | 16 | - |
| Sheet AMS 6345 | Normalize | 0.750" - 1.500" | 90 | 70 | 18 | - |
| Sheet AMS 6345 | Normalize& Heat Treated | 0.249" - 0.375" | - | - | - | 42 |
| Sheet AMS 6345 | Normalize& Heat Treated | 0.375" - 0.500" | - | - | - | 38 |
| Sheet AMS 6345 | Normalize& Heat Treated | 0.500" - 0.625" | - | - | - | 32 |
| Sheet AMS 6345 | Normalize& Heat Treated | 0.625" - 0.750" | - | - | - | 29 |
| Sheet AMS 6345 | Normalize& Heat Treated | 0.750" - 0.875" | - | - | - | 27 |
| Sheet AMS 6345 | Normalize& Heat Treated | 0.875" - 1.500" | - | - | - | 26 |
Application
Shafts, spindles, and control wheels, bolts, studs, gears
Manufacture welded parts, welded structures composed of plates and pipes, and high-pressure pipes
Turbine and boiler manufacturing industries
Automotive Industry: Titanium Grade 1 is used in the automotive industry for lightweight components that enhance fuel efficiency and performance. It can be found in exhaust systems, suspension components, and engine parts.
Electronics and Consumer Goods: Titanium Grade 1's conductivity properties make it useful in electronics and consumer goods. It can be used in electrical connectors, smartphone cases, watches, and eyeglass frames.
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