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Stainless Steel 316
High-grade stainless with molybdenum (10-14% nickel, 2-3% moly)
Certification Requirements
Required certifications, standards compliance, and verification protocols.
Stainless collection and handling QMS
- Chromium, nickel, molybdenum (CRITICAL - all three)
- Iron, carbon, sulfur, phosphorus
- Magnetic property confirmation
- 316 grade verification statement
- Independent lab; ASTM A993 or EN 1.4401 certified
- Explicit Statement: 'Molybdenum Verified 2.0–3.0%
- Grade 316 Confirmed'
- High-Value Material
- Marine Applications
Rejection Criteria
Conditions and thresholds that trigger immediate rejection or downgrading.
ANY magnetic response
IMMEDIATE FULL REJECTION
- Critical: 316 Is Non-Magnetic Austenitic
- Magnetic Indicates Wrong Material
Mo <2.0% OR >3.0%
Full rejection or grade reassignment
- Molybdenum Defines 316 Grade
- If <2% = 304 (Wrong Grade)
- If >3% = Wrong Composition
Mo <0.5% (essentially absent)
FULL REJECTION as 316
- Indicates 304 Contamination Or Wrong Material
- 304 Acceptable But Wrong Grade For 316 Buyer
Cr <16.0% OR >18.0%
Full rejection
Grade specification violation
Ni <10.0% OR >14.0%
Full rejection
- 316 Grade Definition
- High Nickel Distinguishes From Other Grades
Fe <62% OR >68%
Full rejection
Composition outside 316 specification
>0.08%
Full rejection or major credit
High carbon reduces corrosion/workability
Any visible mixing
FULL REJECTION
- Carbon Steel Destroys Entire Furnace Batch
- Melt Failure
Evidence of 304, 430, or other grades
Full rejection
- 316 Purity Critical
- Grade Mixing Compromises Specification
Any detectable
- Immediate Rejection
- Radioactive Waste Protocol
Any visible
- Full Rejection
- Hazardous Waste Protocol
Any detectable
- Full Rejection
- Hazmat Disposal