网络传言打假-含锰10%的不锈钢对狗危害极大，对人也不好

最近网络流传视频，几十条狗吃了不锈钢的锅煮的饭死了2条，他表达观点：目前很多不锈钢锅含孟高过2%的，对人影响不大（潜在含义有害），对狗危害极大！

我本来想忽略的，但是又刷到事件跟踪视频，一个人拿着宝妈邮寄过来的家里不锈钢，测试含锰量，电饭煲内胆，锅，瓢，一堆厨具，测试结果锰含量没有<2%的，最后总结：这堆不锈钢全军覆没。

我于是决定打假！也为了测试自己的判断力。

该网络作者观点：>2%，尤其是>10%的不锈钢材料做厨具对人有影响，对狗危害极大！

我的思考：

1. 为何我能看到这个视频？没有一个视频是无目的的，我没有觉得视频的作者关心我的健康，或者狗的健康。一定有神秘力量在推送，目的不是对我有利，而是对作者有利；
2. 含锰量>10%，对人有害？对狗危害极大？
3. 不锈钢是外国人发明的，他们的标准是什么？

检索结果：

1. 只有316不锈钢额外要求锰量<=2%，通常不锈钢的重点参数是：
   • Chromium (Cr): 16% to 18%
   • Nickel (Ni): 10% to 14%
   • Carbon (C):≤ 0.08%
2. 没有资料表明锰含量>10%的不锈钢是有害的。

   1. 但需要了解不锈钢使用的事项，首选304、316作为厨具、碗。少咀嚼、咬这类不锈钢碗。尽量不用不锈钢食用酸性食物，如柑橘、醋。即使这么做了，微量的锰也不会对人、狗产生影响。

      • For Food/Water Bowls: It is best to stick to 304 (18/8) or 316 stainless steel. These have lower manganese (<2%) and higher nickel, making them much more resistant to corrosion from saliva and food acids.
      • For Cages/Furniture: High-manganese steel is fine as long as the pet isn't a "heavy chewer" who might ingest metal flakes.
      • High-manganese/low-nickel steels (like the 200 series) are less corrosion-resistant than standard 304 or 316 steel
      •  
3. 锰含量>10%的不锈钢不能导致狗死亡，更不会几天内死亡。这方面经过科研人员审核过的文档少，Merck Veterinary Manual中讲到尽管锰是狗的重要营养成分，但慢性过量接触可能导致神经系统问题，比如常年饮用溶解了锰的水。
   • Pet Safety Reference: There is less specific peer-reviewed data for pets, but veterinary toxicology (such as the Merck Veterinary Manual) notes that while manganese is an essential nutrient, chronic over-exposure can lead to neurological issues. Because pets (especially cats and small dogs) have a much lower body mass than humans, even small amounts of leaching from a water bowl used for years could theoretically be more significant for them.

结论：

网络洗脑文，欺负大部分人不思考，焦虑。法律执法机构不作为，骗子横行，靠自己分析！

 

查询时检索内容引用：

what is common ingredient of stainless steel

 

 

 

Copilot finished thinking

 

Copilot said: The common ingredients of stainless steel are: 1.

The common ingredients of stainless steel are:

1. Iron (Fe): The primary component, forming the base of the alloy.
2. Chromium (Cr): The most critical ingredient, typically making up at least 10.5% of the alloy. Chromium creates a thin, invisible layer of chromium oxide on the surface, which provides corrosion resistance and prevents rusting.
3. Nickel (Ni): Often added (especially in the common "300 series" like 304 stainless) to increase corrosion resistance, enhance ductility, and improve the steel's crystal structure (making it "austenitic").
4. Carbon (C): Present in small amounts to provide strength and hardness, though high carbon content can reduce corrosion resistance.
5. Manganese (Mn): Used to improve hot working properties and increase strength and toughness.
6. Molybdenum (Mo): Frequently added to enhance resistance to specific types of corrosion, such as pitting in chloride environments (common in "316" marine-grade stainless).

Other elements like silicon, nitrogen, copper, and titanium may also be added in smaller quantities to achieve specific properties like heat resistance or better machinability.

 

 

 

 

 

 

You said: what is percentage of these ingredients?

what is percentage of these ingredients?

 

 

 

Copilot finished thinking

 

Copilot said: The exact percentage of ingredients in stainless

The exact percentage of ingredients in stainless steel varies depending on the specific "grade" (type) of the alloy. However, for the two most common types used in household items and industry, the typical composition ranges are:

Commonly Used: 304 Stainless Steel (The "18/8" standard)

This is the most widely used stainless steel, found in kitchen sinks, appliances, and cutlery.

• Iron (Fe): ~66% to 74% (The "balance")
• Chromium (Cr): 18% to 20%
• Nickel (Ni): 8% to 10.5%
• Manganese (Mn): ≤ 2%
• Silicon (Si): ≤ 1%
• Carbon (C): ≤ 0.08%

Marine Grade: 316 Stainless Steel

Used in environments with salt or chemicals (like boat parts or chemical processing) because it is more resistant to "pitting" corrosion.

• Iron (Fe): ~62% to 69%
• Chromium (Cr): 16% to 18%
• Nickel (Ni): 10% to 14%
• Molybdenum (Mo): 2% to 3% (The key ingredient that makes it "marine grade")
• Manganese (Mn): ≤ 2%
• Carbon (C): ≤ 0.08%

Key Takeaways on Percentages:

• Chromium: Must be at least 10.5% for the metal to be legally classified as "stainless steel." Most common grades use 16% to 20%.
• Nickel: While not strictly required for all stainless steels (some "400 series" have almost no nickel), it is usually present at 8% to 14% in high-quality consumer goods to make the metal easier to shape and more rust-resistant.
• Carbon: Kept very low (usually under 0.1%) because too much carbon makes the steel brittle and prone to rusting at high temperatures.

 

 

 

 

 

 

You said: what if Manganese > 10%? is it

what if Manganese > 10%? is it harmful for human beings , dogs, cats and other common pets?

 

 

 

Copilot finished thinking

 

Copilot said: When manganese levels in stainless steel exceed

When manganese levels in stainless steel exceed 10%, it is often referred to as High-Manganese Stainless Steel (sometimes called "200 series" or "low-nickel" stainless). Here is how it affects humans and pets:

Is it harmful in solid form?

Generally, no. For both humans and pets (dogs, cats, etc.), stainless steel with >10% manganese is considered safe in its solid, finished state.

• Finished Products: In items like bowls, crates, or kitchenware, the manganese is "locked" into the metal's crystalline structure (alloyed). It does not "leak" or "off-gas" into food, water, or the air under normal conditions.
• Skin Contact: Touching or handling the metal is not harmful.

When does it become harmful?

The danger arises only if the metal is processed in a way that creates dust, filings, or fumes:

1. Inhalation (The Biggest Risk):

   • Humans: If you are welding, grinding, or cutting this steel, you can inhale manganese fumes. Chronic inhalation can lead to Manganism, a serious neurological condition with symptoms similar to Parkinson's disease (tremors, difficulty walking, and mood changes).
   • Pets: Small animals and birds are extremely sensitive to airborne particles and fumes. If you are doing DIY metalwork at home, keep pets in a separate, well-ventilated area.

2. Ingestion (Chewing):

   • Pets: If a dog or cat "chews" on a high-manganese steel object (like a cheap crate or toy) and manages to scrape off or swallow small metal shards or filings, they could potentially suffer from heavy metal toxicity. However, stainless steel is very hard, so this is rare unless the item is poorly made and flaking.
   • Humans: Ingesting metal dust is harmful, but not a common risk with finished household goods.

3. Corrosion (Acidic Foods):

   • High-manganese/low-nickel steels (like the 200 series) are less corrosion-resistant than standard 304 or 316 steel.
   • If you use a high-manganese bowl for very acidic pet food or human food (like vinegar or citrus) and the metal begins to corrode or "pit," tiny amounts of metal ions could technically leach into the food. While usually not enough to cause acute poisoning, it’s why 304 (18/8) steel is preferred for food contact.

Summary for Pets & Humans:

• For Food/Water Bowls: It is best to stick to 304 (18/8) or 316 stainless steel. These have lower manganese (<2%) and higher nickel, making them much more resistant to corrosion from saliva and food acids.
• For Cages/Furniture: High-manganese steel is fine as long as the pet isn't a "heavy chewer" who might ingest metal flakes.
• For DIY/Workshops: If you are cutting or welding any steel with >10% manganese, use a respirator and keep all pets out of the room to avoid lung and neurological damage from the dust.

 

 

 

 

 

 

You said: I need reference of you statement that

I need reference of you statement that High-Manganese Stainless Steel generally no harmful for humans and pets

 Copilot finished thinking

 

Copilot said: The safety of high-manganese stainless steel (often

The safety of high-manganese stainless steel (often referred to as 200-series stainless steel, which replaces expensive nickel with manganese) depends on its form and application.

Below are the specific references and scientific consensus regarding its safety for humans and pets.

1. Solid Form (Finished Products)

In its solid, finished state (e.g., a handrail, a table leg, or a non-food container), high-manganese stainless steel is considered non-hazardous.

• Scientific Basis: Manganese is an alloyed element, meaning it is trapped within the metallic crystal lattice of the steel. It does not "off-gas" or vaporize at room temperature.
• Reference: The Specialty Steel Industry of North America (SSINA) and the International Stainless Steel Forum (ISSF) maintain Safety Data Sheets (SDS) for stainless steel alloys. These documents state that in their solid "as-shipped" form, these alloys do not pose a health hazard via inhalation or skin contact.

2. Food and Water Contact (Leaching Concerns)

When used for food or water bowls (for humans or pets), the concern shifts to leaching (migration of metal ions into the food/water).

• The Risk: High-manganese steels (like Grade 201 or 202) are less corrosion-resistant than standard 304 or 316. If exposed to acidic foods (vinegar, tomatoes, citrus) or scratched deeply, they can leach manganese, iron, and chromium.
• Human Safety Reference: A study published in the journal Food Additives & Contaminants (e.g., J.H. Simal-Gandara et al.) evaluated metal migration from stainless steel. It found that while leaching occurs, the amounts are typically below the Tolerable Daily Intake (TDI) set by the European Food Safety Authority (EFSA), provided the steel is of reasonable quality.
• Pet Safety Reference: There is less specific peer-reviewed data for pets, but veterinary toxicology (such as the Merck Veterinary Manual) notes that while manganese is an essential nutrient, chronic over-exposure can lead to neurological issues. Because pets (especially cats and small dogs) have a much lower body mass than humans, even small amounts of leaching from a water bowl used for years could theoretically be more significant for them.

3. Manufacturing and Processing (The Real Danger)

The statement that manganese is "harmful" usually refers to dust or fumes, not the solid metal.

• Human Health Reference: The Occupational Safety and Health Administration (OSHA) and NIOSH have strict limits on manganese exposure. Inhaling manganese fumes (from welding) or dust (from grinding) causes "Manganism," a serious neurological condition similar to Parkinson’s disease.
• Pet Safety Reference: Birds are particularly sensitive to airborne toxins. If you are grinding or welding high-manganese steel in a home workshop, the fumes could be lethal to a pet bird or harmful to a dog/cat in the same room.

Summary Recommendation

Use Case	Safety Level	Recommendation
Furniture/Hardware	Safe	No risk to humans or pets.
Food/Water Bowls	Caution	For pets, it is better to use 304 (18/8) Grade stainless steel. High-manganese steel (200-series) can rust or leach over time, especially with acidic cleaning agents.
DIY/Welding	Dangerous	Avoid doing this around pets; use high-grade ventilation and a respirator.

How to check: If you have a stainless steel item and a magnet sticks to it strongly, it is often a lower-grade steel (like 400-series or some 200-series). High-quality food-grade 304/316 stainless steel is typically non-magnetic or only very weakly magnetic.