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50MN/65MN Manganese Steel Strip/Sheet Supply | 200–230mm Width

Publish Time: 2026-03-14 14:42:26

Friends in machinery manufacturing and hardware stamping all know that manganese steel is a well-deserved "tough guy" material. Especially grades 50MN and 65MN, they boast high hardness and excellent wear resistance. The 200–230mm width range is perfectly suited for processing needs of most heavy-duty equipment. Today we’ll break down these two manganese steel strips/sheets from composition to application, so you can avoid mistakes when purchasing and selecting materials!

Core Parameter Comparison Table

Comparison Item	50MN Manganese Steel Strip/Sheet	65MN Manganese Steel Strip/Sheet	Practical Tips
Width Range	200–230mm	200–230mm	Can be slit and cut to order; tolerance controlled within ±0.5mm
Thickness Specification	0.5–10mm (standard); custom thick sheets available	0.5–10mm (standard); custom thick sheets available	Thin strips for stamped parts; thick sheets for heavy-duty structural components
Core Composition	C: 0.48–0.56%, Mn: 0.70–1.00%	C: 0.62–0.70%, Mn: 0.90–1.20%	Higher carbon and manganese content = better hardness and wear resistance
Mechanical Properties	Tensile strength ≥645MPa, hardness HB190–220	Tensile strength ≥785MPa, hardness HB229–285	65MN is 30% harder than 50MN, more wear-resistant and durable
Heat Treatment Effect	Hardness HRC40–45 after quenching, good toughness	Hardness HRC50–55 after quenching, outstanding wear resistance	65MN for elastic parts; 50MN for wear-resistant structural parts
Application Scenarios	Agricultural machinery parts, automotive leaf springs, wear-resistant gaskets	Spring strips, saw blades, cutting tools, stamping dies	Choose materials based on needs to avoid over-specification and cost waste

50MN/65MN Manganese Steel Strip/Sheet Supply | 200–230mm Width(图1)

50MN/65MN Manganese Steel Strip/Sheet Supply | 200–230mm Width(图2)

50MN and 65MN both belong to high-quality carbon structural steels. Their core advantages come from the optimal ratio of carbon and manganese — these two elements are the source of manganese steel’s "tough guy properties"!

Core Application Scenarios

1. Transportation & Machinery Manufacturing

Various Springs: The most classic application, including automotive shock absorber springs, clutch shims, engine valve springs, mechanical leaf springs, instrument springs, etc.
Wear-Resistant Parts: Crusher hammers and screen plates for mining machinery, plowshares and blades for agricultural machinery.
Cutting Tools: Saw blades, knives, scrapers, etc. — their high hardness and wear resistance extend service life.

2. Hardware Tools & Precision Components

Hardware Tools: Key stress-bearing components of wrenches and pliers, steel strips for tape measures, spring washers, etc.
Precision Parts: Grinding machine spindles, spring collets, precision machine tool lead screws, bearing rings, etc.

Detailed Performance Parameters (65MN as Example)

Item	Index/Range	Description
Chemical Composition (C)	0.62% ~ 0.70%	High carbon content ensures strength and hardness
Chemical Composition (Mn)	0.90% ~ 1.20%	Improves hardenability and overall performance
Tensile Strength (MPa)	≥ 980 (up to 1300+ after heat treatment)	Ability to withstand extreme loads
Yield Strength (MPa)	≥ 785	Stress at which material begins plastic deformation
Hot-Rolled Hardness (HB)	≤ 302	Hardness reference in delivery state
Hardness After Heat Treatment (HRC)	38 ~ 60	Can be adjusted via heat treatment according to needs

Common Q&A

Q1: How to choose between 50MN and 65MN?

A1: It depends on your needs! 65MN has higher carbon content, better strength, hardness and elasticity, making it suitable for manufacturing springs and wear-resistant parts. 50MN has slightly lower carbon content, slightly inferior strength and hardness, but relatively better plasticity and toughness, and better formability. It is suitable for occasions with lower strength requirements or requiring certain cold forming processes.

Q2: What should be noted during welding?

A2: These two materials have poor weldability. High carbon content tends to cause hardened structures and cracks in the weld zone. If welding is necessary, be sure to take measures such as preheating (300–400℃), using low-hydrogen electrodes, controlling welding heat input, and slow cooling or timely tempering after welding.

Q3: What is the heat treatment process?

A3: The typical heat treatment process is quenching + medium-temperature tempering. Taking 65MN as an example: quenching temperature is about 830℃±20℃ (oil cooling), and tempering temperature is about 540℃±50℃. Quenching achieves high hardness, while tempering eliminates internal stress and adjusts to the required elasticity and toughness. Specific parameters need to be fine-tuned according to part size and performance requirements.

Q4: How to judge quality when purchasing?

A4: Four key checks:

Check material certificate: Ask the supplier for chemical composition and mechanical property reports that comply with national standards (such as GB/T 699, GB/T 1222).
Inspect surface condition: Observe whether the surface is flat and free of severe rust, cracks, folds and other defects.
Confirm delivery state: Clarify whether it is hot-rolled, cold-rolled or heat-treated, and whether it meets your processing requirements.
Test dimensional accuracy: Especially check whether the thickness and width tolerances meet the requirements of your drawings.

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