34Cr4 -- basic Cr Q+T steel. Rm 800-1000 MPa. Lower cost than 42CrMo4. For bolts, shafts and small components requiring more strength than C35 without full Cr-Mo alloying cost.
34Cr4 (EN 1.7033) per EN 10083-3. Single Cr (0.90-1.20%) alloying without Mo gives improved hardenability to 20-25 mm. Rm 800-1000 MPa Q+T. Standard for medium-duty bolts, pins, shafts and small components where C35 lacks strength and 42CrMo4 cost is not justified.
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