Home / Metals / Special Alloy Steel / 34CrMo4 – AISI 4135 – DIN 1.7220 Chromium-Molybdenum Alloy Structural Steel 34CrMo4 – AISI 4135 – DIN 1.7220 Chromium-Molybdenum Alloy Structural Steel Get A Free Quote Now! Related products Type 303 (UNS S30300/1.4305) Type 317L (UNS S31703/1.4438) Type 301 (UNS S30100/1.4310)