---
title: "5599 — 4 equivalent grades, compared"
description: "The designation 5599 is carried by 4 different grades. Compare them on the elements that actually differ, then open the one your print means."
canonical: https://steelequivalents.com/materials/ams/5599
language: en
robots: index, follow
og_type: website
type: material-detail
language_alternates:
  en: https://steelequivalents.com/materials/ams/5599.md
  cs: https://steelequivalents.com/cs/materiály/ams/5599.md
  de: https://steelequivalents.com/de/werkstoffe/ams/5599.md
  es: https://steelequivalents.com/es/materiales/ams/5599.md
  fr: https://steelequivalents.com/fr/matériaux/ams/5599.md
  hu: https://steelequivalents.com/hu/anyagok/ams/5599.md
  it: https://steelequivalents.com/it/materiali/ams/5599.md
  nl: https://steelequivalents.com/nl/materialen/ams/5599.md
  pl: https://steelequivalents.com/pl/materiały/ams/5599.md
  pt: https://steelequivalents.com/pt/materiais/ams/5599.md
  ru: https://steelequivalents.com/ru/материалы/ams/5599.md
  tr: https://steelequivalents.com/tr/malzemeler/ams/5599.md
  zh: https://steelequivalents.com/zh/材料/ams/5599.md
  ja: https://steelequivalents.com/ja/材料/ams/5599.md
  ar: https://steelequivalents.com/ar/المواد/ams/5599.md
  ko: https://steelequivalents.com/ko/재료/ams/5599.md
  pt-br: https://steelequivalents.com/pt-br/materiais/ams/5599.md
  hi: https://steelequivalents.com/hi/सामग्री/ams/5599.md
content_hash: sha256:8118fff28ddb301626808231697c0db7c46c31f1a58be52187a888c35bd2478a
generated: 2026-09-22
---

> **Machine-readable Markdown rendering.** This is a Markdown representation of a web page,
> served for AI agents and crawlers as a token-efficient alternative to the full HTML.
> Full interactive HTML version: https://steelequivalents.com/materials/ams/5599
> Canonical URL: https://steelequivalents.com/materials/ams/5599
> Available languages: en, cs, de, es, fr, hu, it, nl, pl, pt, ru, tr, zh, ja, ar, ko, pt-br, hi
> Change detection: `content_hash` is the SHA-256 of this document's Markdown body — everything
> below this block, whitespace-trimmed, excluding the front-matter. Compare it to detect a real
> content change; `generated` moves on every render and is not a change signal.

SAE AMS · United States / Aerospace · 4 grades

# 5599

The designation 5599 is carried by 4 different grades. Compare them on the elements that actually differ, then open the one your print means.

- *Matching grades* **4**
- [*Category* **Others · 1754 grades**](/categories/others "Category: Others · 1754 grades")
- [*Category* **Heat resistant steels · 64 grades**](/categories/heat-resistant-steels "Category: Heat resistant steels · 64 grades")

[Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry")

## Which of the 4 do you want?

This name is carried by several grades. The elements shown are the ones whose values actually differ across the set — the ones that decide the question. Values are the source text verbatim; an em dash means no value on file for that element on that grade, not zero.

| Grade | Material no. | Category | Designations | Nb% | Ni% | C% | Si% | Mn% | Fe% |
|---|---|---|---|---|---|---|---|---|---|
| [SG-NiCr21Mo9Nb](/materials/din-en/sg-nicr21mo9nb "SG-NiCr21Mo9Nb") | [2.4831](/materials/material-no/2.4831 "2.4831") 2.4 | [Others](/categories/others "Others") | 9 | 3,00-4,50 | ≥60,0 | ≤0,10 | ≤0,50 | ≤0,50 | ≤5,00 |
| [NiCr22Mo9Nb](/materials/din-en/nicr22mo9nb "NiCr22Mo9Nb") | [2.4856](/materials/material-no/2.4856 "2.4856") 2.4 | [Heat resistant steels](/categories/heat-resistant-steels "Heat resistant steels") | 24 | 3,15-4,15 | ≥58,0 | 0,03-0,10 | ≤0,50 | ≤0,50 | ≤5,00 |
| [NiCr22Mo9Nb](/materials/din-en/nicr22mo9nb "NiCr22Mo9Nb") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | [Heat resistant steels](/categories/heat-resistant-steels "Heat resistant steels") | 9 | 3,00-4,20 | ≥55,0 | ≤0,10 | ≤0,80 | ≤2,00 | ≤7,00 |
| [NiCr22Mo9Nb](/materials/din-en/nicr22mo9nb "NiCr22Mo9Nb") | [Ni 6625](/materials/material-no/ni-6625 "Ni 6625") | [Heat resistant steels](/categories/heat-resistant-steels "Heat resistant steels") | 9 | 3,00-4,10 | ≥58,0 | ≤0,10 | ≤0,50 | ≤0,50 | ≤5,00 |

## Not sure which one your print means?

Search the catalogue by designation, material number or composition — every name on this page is itself a way in.

[Search](/search "Steel grade search")[Inquiry](/inquiry "Inquiry")
