65Mn Steel Strip — Factory Direct Supplier | Huaxia-Steel
65Mn steel strip is a high-carbon manganese spring steel supplied in cold-rolled or hot-rolled strip form. With approximately 0.62–0.70% carbon and 0.90–1.20% manganese, it offers excellent elasticity, fatigue resistance and wear resistance after quenching and tempering. Huaxia Steel supplies 65Mn strip from Chinese mills in a wide range of thicknesses, widths and tempers for automotive, agricultural, hardware and industrial spring applications.
Product Overview
65Mn is the Chinese GB/T standard designation for a widely used spring and blade steel. It is equivalent or similar to SAE 1065, DIN 1.0904 and Japanese SUP6 in composition and properties, although exact equivalence should always be confirmed by mill test certificate. The material is normally supplied in the annealed, cold-rolled or quenched-and-tempered condition, depending on the end application.
Typical Specifications
| Parameter | Range / Value |
|---|---|
| Standard | GB/T 1222, GB/T 3275, ASTM A684, JIS G4401, DIN 17222 |
| Thickness | 0.10 mm – 6.0 mm |
| Width | 10 mm – 600 mm (slit to narrow widths on request) |
| Coil inner diameter | 300 mm / 400 mm / 508 mm |
| Coil outer diameter | Up to 1,500 mm |
| Surface finish | Bright, matte, polished, blue tempered |
| Edge condition | Slit edge, round edge, deburred |
| Delivery condition | Annealed, cold-rolled, quenched & tempered |
Chemical Composition (GB/T 1222)
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.62 – 0.70 |
| Silicon (Si) | 0.17 – 0.37 |
| Manganese (Mn) | 0.90 – 1.20 |
| Sulfur (S), max | 0.035 |
| Phosphorus (P), max | 0.035 |
| Chromium (Cr), max | 0.25 |
| Nickel (Ni), max | 0.25 |
Mechanical Properties
| Condition | Tensile strength | Yield strength | Hardness |
|---|---|---|---|
| Annealed | ≤ 735 MPa | ≥ 430 MPa | ≤ 229 HB |
| Cold-rolled | 785 – 1,180 MPa | ≥ 540 MPa | 240 – 360 HV |
| Quenched & tempered | 1,220 – 1,570 MPa | ≥ 1,080 MPa | 38 – 48 HRC |
Available Grades
Besides 65Mn, we supply related carbon and alloy spring strip grades:
- 60Si2Mn / 60Si2MnA silicon-manganese spring strip
- 50CrVA chromium-vanadium spring strip
- SAE 1065 / SAE 1070 high-carbon strip
- CK67 / CK75 German spring strip grades
- Sk5 / Sk7 Japanese tool and spring strip
Applications
- Leaf springs and coil springs for automotive and trailers
- Saws, knives, scraper blades and cutting tools
- Clutches, brake shoes and friction components
- Agricultural tines, rake teeth and harrow blades
- Hardware springs, clips, clamps and washers
- Conveyor belts, screen meshes and vibrating equipment
Quality Assurance
Each coil is supplied with a mill test certificate showing heat number, chemical composition, mechanical properties and dimensional tolerance. Optional third-party inspection by SGS, BV or Intertek is available. We can arrange ultrasonic testing, eddy-current testing and surface-defect inspection for critical spring applications.
Packaging and Shipping
65Mn strip is supplied in coils wrapped with anti-rust paper, plastic film and steel straps. Wooden pallets or steel cradles are used for export shipments. Each package is labelled with grade, dimensions, heat number, coil weight and country of origin. Sea freight, rail and air freight options are available depending on urgency and volume.
Why Buy 65Mn Steel Strip from Huaxia Steel
- Direct mill relationships in Jiangsu, Hebei and Shandong
- Slitting service to custom width and edge condition
- Heat treatment (annealing, Q&T, blue tempering) on request
- Full traceability with EN 10204 3.1/3.2 MTC
- Competitive pricing for export volumes
Request a Quote
Tell us your required thickness, width, temper and quantity. Our team will confirm availability, lead time and the best delivery condition for your application. Contact Huaxia Steel for 65Mn steel strip pricing today.
Manufacturing Process
65Mn strip is produced by continuous casting, hot rolling, pickling, cold rolling and annealing. For spring applications, the strip is often quenched and tempered to achieve the required hardness and elasticity. Edge conditioning is done by slitting or shaving to remove cracks and improve fatigue life. Surface quality is controlled through descaling, pickling and protective oiling.
- Continuous casting of billets
- Hot rolling to intermediate strip thickness
- Pickling to remove oxide scale
- Cold rolling to final thickness
- Annealing or quenching and tempering
- Slitting, edge conditioning and coiling
Inspection and Testing
Each coil is tested for tensile strength, hardness, elongation and bending performance. Surface defects are inspected visually and with eddy-current testing. Dimensional checks include thickness, width, camber and coil weight. Chemical composition is verified by spectrometer for each heat.
Equivalent Standards
| Standard | Grade |
|---|---|
| SAE/AISI | 1065 |
| DIN | 1.0904 / 65Mn4 |
| JIS | SUP6 |
| GB | 65Mn / GB/T 1222 |
FAQ
Can 65Mn strip be used for knife blades?
Yes, in the quenched and tempered condition it can be used for simple blades, saws and cutting tools. For premium knives, alloy tool steels such as 9Cr18MoV or D2 are preferred.
What is the minimum order quantity?
For standard thickness and width, MOQ is usually 3 – 5 tonnes. For custom slitting or special heat treatment, MOQ may be 10 tonnes or more.
How should 65Mn strip be stored?
Store in a dry warehouse away from moisture and salt air. If stored outdoors, keep coils elevated and covered. Apply additional rust-preventive oil for long-term storage.
