{
    "type": "pneumaticcraft:pressure_chamber",
    "inputs": [
      {
        "type": "pneumaticcraft:stacked_item",
        "tag": "forge:ingots/black_steel"
      },
      {
        "item": "tfc:powder/flux"
      },
      {
        "type": "pneumaticcraft:stacked_item",
        "tag": "forge:ingots/weak_red_steel"
      }
    ],
    "pressure": 4.5,
    "results": [
      {
        "item": "tfc:metal/ingot/high_carbon_red_steel"
      }
    ]
  }