Duplex 2205 Scrap / S31803 Scrap / 2205 Duplex Steel Scrap

Product Description

Material Overview

Duplex 2205 (UNS S31803 / UNS S32205 / EN 1.4462) is a nitrogen-enhanced austenitic-ferritic dual-phase stainless steel. Containing roughly 22% chromium, 5% nickel, and 3% molybdenum, it combines high mechanical strength (roughly double that of conventional austenitic grades like 304 or 316) with superior resistance to chloride stress-corrosion cracking, pitting, and crevice corrosion.

Duplex 2205 / S31803 / S32205 Chemical Composition Specification

Mechanical & Physical Properties

Duplex 2205 Scrap & Foundry Grade Characteristics

• Types of Scrap: Plate offcuts, pipe ends, forging crops, bar ends, sheet skeletons, valve/pump casting gates and risers, CNC turnings, and solid foundry melt stock.

• Scrap Classifications:

  • Heavy Solid Scrap: Plate cut-offs, pipe crops, and heavy forgings (preferred melt stock for induction and arc furnaces).

  • Turnings & Chips: Machining borings (must be degreased, dried, and free from cross-contamination with standard 300-series or carbon steel turnings).

  • Foundry Grade: High-purity, clean pieces free of attachments, oils, moisture, or non-ferrous elements.

• Sorting & Quality Verification:

  • Magnetic Response: Partially/moderately ferromagnetic due to its 50/50 ferrite-austenite microstructural balance. This distinguishes it from fully non-magnetic austenitic stainless steels (304, 316) and fully magnetic ferritics/martensitics (430, 410).

  • PMI / XRF Testing: Critical to verify the 3.0% Molybdenum and 22% Chromium levels, preventing mixing with Lean Duplex (e.g., 2101) or Super Duplex (e.g., 2507).

Key Industry Standards & Specifications

• ASTM Standard: ASTM A240 / A240M (Plate, Sheet, Strip), ASTM A182 (Grade F51 / F60), ASTM A276, ASTM A789, ASTM A790, ASTM A815

• ASME Standard: ASME SA240 / SA182

• UNS Designation: UNS S31803 (F51) / UNS S32205 (F60)

• EN / W.Nr Standard: 1.4462 / X2CrNiMoN22-5-3

• HS Code: 7204.49 (Stainless Steel Scrap) / 7219.32 (Flat-rolled Stainless Steel)