Chef's Knife (stainless)

Material Composition Assumptions

The assessment considers a standard chef’s knife weighing approximately 300 grams with the following material breakdown:

• Stainless steel blade comprising 220 grams using 304 or 440C grade steel with iron content between 70-82%
• Chromium alloy additions totaling 25 grams representing 10.5-18% of the steel composition
• Nickel content contributing 15 grams at 0-8% depending on specific grade requirements
• Hardwood handle materials such as rosewood or walnut accounting for 35 grams
• Stainless steel rivets and fittings using 304 grade steel weighing 5 grams

The blade represents approximately 73% of total product mass while the handle and hardware comprise the remaining 27%. Steel quality grades affect both carbon intensity and product durability characteristics.

Manufacturing Geography

European production centers dominate high-quality chef’s knife manufacturing due to established steel processing infrastructure and skilled metalworking capabilities. German facilities utilize grid electricity averaging 350 grams of carbon dioxide per kilowatt-hour according to recent energy authority data.

This regional concentration exists because European manufacturers have invested heavily in scrap-based steel production systems that achieve 50-85% recycled content ratios. These facilities benefit from established supply chains for chromium and nickel alloys while maintaining proximity to both raw material sources and target consumer markets.

The electrical grid composition in manufacturing regions significantly influences total product emissions since steel processing requires substantial energy inputs for melting, forming, and finishing operations.

Regional Variation

Manufacturing Region	Grid Intensity	Estimated CCI Score	Adjustment vs Default
Germany/Europe	350 g CO2/kWh	2.1	Baseline
China	550 g CO2/kWh	2.8	+33%
Japan	450 g CO2/kWh	2.5	+19%
United States	400 g CO2/kWh	2.3	+10%
Nordic Countries	150 g CO2/kWh	1.7	-19%

Provenance Override Guidance

1. Steel composition analysis documenting actual recycled content percentages and specific alloy grades used in blade production
2. Energy consumption records from manufacturing facilities including electricity source verification and renewable energy certificates
3. Transportation documentation showing shipping distances and methods from steel mill through final assembly to distribution centers
4. Supplier-specific lifecycle assessment data for chromium and nickel inputs including mining and processing locations
5. Handle material sourcing verification including wood species, forestry certification status, and processing location data

Methodology Notes

• The CCI score represents cradle-to-gate emissions for a complete chef’s knife ready for retail distribution
• Scope 3 emissions dominate due to upstream steel production while direct manufacturing energy comprises smaller fractions
• Functional unit assumes a standard 20-centimeter blade length with typical consumer-grade construction quality
• End-of-life recycling benefits are excluded though stainless steel maintains high recyclability rates
• Handle material emissions show variation based on wood species selection and finishing treatments applied
• Regional grid intensity creates the largest variable factor in total product carbon footprint calculations