65Mn hot rolled steel round bars

65Mn high carbon steel is mainly used in the manufacture of various small-section flat springs, round springs, clockwork, etc. It can also be used to manufacture spring rings, valve springs, shock absorbers, clutch reeds and brake springs.

Classification :

PRODUCT DETAILS

65Mn hot rolled steel round bars information

65Mn steel is a Chinese GB standard spring steel grade, Manganese (Mn) improves hardenability, so the strength, hardness, elasticity and hardenability are higher than that of 65# steel, but it has overheat sensitivity and temper brittleness. Water quenching tends to form cracks. The annealed state has good machinability, low cold deformation plasticity, and poor weldability.
65Mn high carbon steel is mainly used in the manufacture of various small-section flat springs, round springs, clockwork, etc. It can also be used to manufacture spring rings, valve springs, shock absorbers, clutch reeds and brake springs.

Chemical and Mechanical

Chemical Composition

The table below lists 65Mn high carbon steel chemical composition based on heat analysis.

Chemical Composition, %
Standard Grade C Si Mn P, ≤ S, ≤ Cr, ≤ Ni, ≤ Cu, ≤
GB/T 1222 65Mn 0.62-0.70 0.17-0.37 0.90-1.20 0.030 0.030 0.25 0.35 0.25

65Mn Material Properties

Density: 7.85 g/cm3

    Mechanical Properties
Standard Grade Tensile Strength, MPa, ≥ Yield Strength, MPa, ≥ Elongation, %, ≥ Reduction in Area, %, ≥ Brinell Hardness, HBW, ≤
GB/T 1222 65Mn 980 785 8.0 30 302

Notes: Bars with a diameter and side length of not more than 80 mm and flat steels with a thickness of not more than 40 mm.

Heat Treatment Specification

    Heat Treatment
Standard Grade Quenching temperature, °C Quenching medium Tempering temperature, °C
GB/T 1222 65Mn 830 ± 20 Oil 540 ± 20

Annealing process: Annealing temperature (860 ± 10) °C, heat preservation for 45-60min, furnace cooling to (750 ± 10) °C, heat preservation for 3-3.5h, and furnace cooling to 650-660 °C, then cooling out of the furnace or slow cooling in a heat preservation pit.

Warehouse storage

Our company is a quality benchmark enterprise in Shandong Province, a national contract-abiding and credit-abiding enterprise, and a national, industry and group standard unit for "Colored Steel Plate for Building Decoration". We have many customers all over the world, and our products are exported to Asia, the Middle East, America, Europe, Africa and other countries, enjoying a good reputation at home and abroad. Up to now, we have also established long-term, win-win partnerships with a number of large steel mills.

 

 

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We are the first-level agent for Chinese state-owned enterprises Shanghai Baosteel and Taigang Iron and Steel Group. Our products can meet every unique requirement of our customers. We provide customized services. We can support customers with quality inspections if needed. We can provide competitive prices, good quality control, purchasing suggestions. Welcome to inquire and order!

 

 

Customer visit

Up to now, we have also established long-term, win-win partnerships with a number of large steel mills. We are the first-level agent for Chinese state-owned enterprises Shanghai Baosteel and Taigang Iron and Steel Group. Our products can meet every unique requirement of our customers. We provide customized services.

 

 

Application field

The main supply fields are: aerospace, national defense equipment, military weapons, chemical industry, shipbuilding, nuclear energy, trains, containers, environmental protection, precision machining, auto parts, machinery, electronic products, molds, medical treatment Equipment, construction, decoration, etc.

 

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