In a small bowl, combine orange juice, olive oil, soy sauce, ground ginger, and brown sugar.
Place salmon steaks into a resealable bag or shallow pan for marinating. Pour orange mixture over steaks. Refrigerate and marinade for 30-60 minutes.
Preheat a well oiled gas grilled to high heat. Sear the salmon steak for 5 minutes per side. Check for done-ness. Actual cooking time will depend on the thickness of the steak. Steaks are done when they flake easily with a fork.