Half Hard Cold Rolled Spring Steel Strips in Carbon Steel Grades for Straight Parts and Stamping
Keywords:
half hard steel strip, semi-hard spring strip, medium hardness strip steel, 65Mn semi-hard strip, flat part raw material strip
Overview
Semi-hard half soft steel strip is processed by controlled cold rolling without full annealing, reaching medium hardness status with balanced toughness and rigidity. Different from super soft fully annealed strip and high-hard quenched strip, it keeps good flatness after stamping and forming, avoiding bending distortion, which is the preferred raw material for various flat, straight mechanical parts. We provide full grades and flexible size customization for flat springs, flat shims, straight locating hardware components.
Material & Surface Treatment
65Mn /60Si2Mn: GB/T1222-2016
C67S: EN10132-2021
SK85: YB/T5058
40Mn: GB/T711-2017
50#: GB/T699-2015
Same executive standards as annealed strip for each steel grade. Semi-hard cold rolling process to achieve medium hardness, stable flatness, original surface finish without additional coating, thickness 0.15~3.0mm, customized slitting service.
Application
Mainly used for flat washers, flat springs, straight hardware spacers, mechanical flat locating parts, auto flat fittings and various precision straight stamped components.
| Medium Balanced Hardness | Optimal match of hardness and toughness, keep flat after stamping for straight parts. |
| Stable Flatness | Less internal stress, finished flat parts with low deformation rate. |
| Complete Steel Grades | Full spring steel & carbon steel options for diversified production requirement. |
| Flexible Size Custom | Slitting & cutting to length available for customer’s specific dimension. |
| Convenient Post Processing | Suitable for punching, blanking without subsequent heat treatment for regular flat parts. |
Top Sellers
Eugene (Wenzhou) Industry Co., Ltd is a specialized manufacturer focused on fastening products, delivering trusted solutions to global partners.
Frequently Asked Questions
product
What core advantages does standard DIN471 external circlip have over non-standard snap rings?
Produced per DIN471 & EN10132-4, it features precise dimension matching standard grooves. Made of 65Mn/C67S, it delivers outstanding anti-fatigue performance and resists loosening under long-term vibration.
How to maintain DIN472 when elastic weakness appears during equipment inspection?
Fatigued circlip cannot be restored; replace with brand-new DIN472 and forbid repeated usage of deformed old parts.
Standard installation operation of DIN6799 circlip?
Align E opening with shaft groove and press down vertically with flat screwdriver until fully seated.
Benefit of phosphated surface for DIN2093 during component service?
Phosphating improves rust and wear resistance to extend service life of DIN2093 inside hydraulic cylinders and high-pressure valves.
Self-locking fixing principle of DIN1481 slotted spring pin?
Slotted body shrinks during pressing and rebounds to expand against hole wall, forming radial preload for self-lock positioning.
business
How to select material of ISO8752 reasonably for different working environments?
Choose 65Mn black oxide carbon steel for dry indoor machinery, auto chassis and general reducer; switch to stainless steel ISO8752 for damp, oily and corrosive working conditions like water pumps and food equipment.
Correct disassembly method for DIN1 during mould maintenance?
Eject DIN1 from opposite end via pin punch; violent hammering is forbidden to avoid bore deformation.
Solution for stuck DIN7 taper pin during equipment overhaul?
Knock out from big end; drill and replace new DIN7 if severely rust locked.
Heat treated quenched steel strip includes blued strip and polished strip, what are respective advantages of two surface types?
All heat treated quenched steel strip is fully quenched with high hardness and stable elasticity. Blued steel strip forms uniform blue oxide layer for natural rust resistance with high cost performance; polished steel
What are the core advantages of annealed steel strip compared with semi-hard strip and heat treated quenched steel strip?
Made from 65Mn, C67S and other spring steel grades, annealed steel strip gets full full-annealing stress relief treatment. It owns the best ductility among three types of steel strips, hardly cracking during bending,
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