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1) alloy steel round bar Sae 4140/42crmo4/DIN 1.7225/Scm 440/GB 42crmo 2) Chemical composition: C: 0.38~0.45 Si: Max 0.40 Mn: 0.60~0.90 S: Max 0.035 P: Max 0.035 Cr: 0.90~1.20 Ni: Max 0.030 Cu: Max 0.030 Mo: 0.15~0.30 3. Process of alloy steel round bar: EAF + LF + VD + Heat Treatment (optional) 4. Delivery condition of alloy steel round bar: Hot-rolled, black surface 5. Technical Data: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing 7. Test of alloy steel round bar: Ultrasonic test according to SEP 1921-84 3C/c 8. Material details will be as per agreed technical specifications 9. Certificate of Quality: Issued in English, in addition the normal terms, production process, the mechanical property (yield strength, tensile strength, elongation and hardness), forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.