+7 (4862) 36-90-36 ABOUT COMPANY CATALOG PRODUCTION TECHNICAL INFORMATION NEWS CONTACTS Manufacturing technology for bolts, screws and studs Strength class Technological processes Example steel grade Quenching temperature, ° С, not less Tempering temperature, ° С, not less 3.6 Hot stamping 10, 10 kp - Cold forming followed by softening heat treatment twenty Low temperature tempering, heating 620 ° С, exposure 3 hours 4.6 Hot stamping 10, 10 kp - Cold forming followed by softening heat treatment twenty Low temperature tempering, heating 620 ° С, exposure 3 hours 4.8 Cold stamping 10, 10 kp - 5.6 Hot stamping 30, 35 - Cold forming followed by softening heat treatment 30, 35 Low temperature tempering, heating 620 ° С, exposure 3 hours 5.8 Cold stamping 10, 10 kp 20, 20 kn - 6.6 Hot forging followed by quenching and tempering 35 840 560-580 Cold forming followed by quenching and tempering 35 840 560-580 Hot stamping 45, 40 G - 6.8 Cold stamping 20, 20 kn - 8.8 Hot forging followed by quenching and tempering Cold forming followed by quenching and tempering Cutting followed by quenching and tempering Cold forming of heat-strengthened metal 35, 35X, 38XA, 45G 40G2, 40X, 30HGSA, 35HGSA, 16HSN, 20G2R, 30H3MF 860-920 530-560 9.8 530-560 10.9 470-490 10.9 470-490 12.9 440-460 © 2017 Parallel All rights reserved. COMPANY PRODUCTION CONTACTS TECHNICAL INFORMATION CATALOG Bolts Screws Nuts Washers and rings Hairpins Foundation bolts Rivets, axles, rollers, cotter pins Engineering details. Metalworking orders +7 (4862) 36-90-36 parallel@bolt57.ru Twitter Facebook In contact with Youtube Website development and promotion