blue tempered spring for rolling shutter

1.blue tempered spring for rolling shutter 2.CK67,AISI 1065,1070,CS70 3.0.15~2.5mm*8~650mm 4.round, slit

Blue Tempered spring steel strip for rolling shutter door

Heat treatment is carried out mainly for reducing sheet thickness, improving surface finishing, preparing the surface for coating and providing a range of tempers.

Cold rolled steel sheets offer a wide variety of outstanding appliances, furniture and with many other items.

Thickness Range:       0.15~ 2.5 mm

Width range:                 8 ~ 650 mm

High Hardness:          Max. HRC55 (HRB120, HV555)

Standard/quality:        DC01, DC03, DC04, DC05, DC06 according to EN Standards

                                   CD, DQ, DQSK according to ASTM Standards

                                   Enameling Grades:

                                   DC01EK, DC04EK or EK2, EK4

Finishes:                     Nature, Polished bright, grey blue, polished blue, yellow

Edge:                          Mill, Slit, Round, sheared/mill

Tensile strength:        1405-1577 kg/mm2 (137-155Mpa)

Yield strength:            370-1175 kg/mm2 (36-115Mpa)

Tempers:                     Full hard, Soft for cold forming.

                                   Hardness as per client’s request

Forms:                        Coils, Sheets, strips

Applications:             Springs for shutter door

Raw Material:            Baosteel

                                   CK67,CK75,

                                   SAE1065,SAE1070

                                   CS60,CS70,

                                   C70,C75

I.D. Coil:                    < 20”, 50.8cm

O.D. Coil:                  < 60”, 152.4cm

Max weight:               < 6,000 lbs, 2727 kgs

blue tempered spring for rolling shutter