Chemical Analysis — Stainless Steel Plate, Sheet & Strip
(IS 6911 / ASTM A240 — Stainless Steel Chemical)
Chemical composition testing of stainless steel plates, sheets and strips per IS 6911 and ASTM A240 — verifying Cr, Ni, Mo, C, Mn, S, P for grade identification and corrosion resistance certification.
What is the Chemical Analysis — Stainless Steel Plate, Sheet & Strip?
Stainless Steel Chemical Analysis for plates, sheets and strips determines the grade — primarily from Chromium (Cr ≥10.5%), Nickel (Ni), Molybdenum (Mo) and Carbon (C) content. Common Indian construction and process industry grades include 304 (18%Cr, 8%Ni), 304L (low carbon), 316 (18%Cr, 10%Ni, 2%Mo for chloride resistance), 316L and duplex grades — specified per IS 6911 and ASTM A240.
At Global Lab, stainless steel chemical analysis by OES simultaneously determines Cr, Ni, Mo, C, Mn, Si, S, P, N, Ti, Nb — providing complete grade identification per IS 6911 / ASTM A240. Grade verification is critical because 304 and 316 are visually identical but have very different corrosion resistance — 316 (with Mo) is required for marine, pharmaceutical and chemical process applications.
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Chemical Analysis — Stainless Steel Plate, Sheet & Strip — Site Images
How the Chemical Analysis — Stainless Steel Plate, Sheet & Strip is Conducted
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1
Surface Preparation
A shallow groove (approx. 25mm deep) is cut into the concrete surface using a diamond-tipped cutting tool. The surface is cleaned of dust and debris. -
2
Insert Disc Placement
A specially designed steel insert disc is placed into the groove. A thin rod connects the disc to the pullout apparatus above the surface. -
3
Hydraulic Pullout Force Application
A hydraulic jack applies a steady, controlled pullout force to the insert disc via the reaction ring resting on the concrete surface. -
4
Failure Load Recording
The maximum force at which the concrete cone is extracted is recorded. A digital load indicator provides real-time readings with data logging. -
5
Strength Calculation & Reporting
The pullout force is correlated to cube compressive strength using established calibration curves. NABL-accredited reports are issued via Autovity QLMS.
Applicable Test Standards
| Standard | Title | Scope | Type |
|---|---|---|---|
| IS 6911 | Stainless Steel Plate, Sheet and Strip — Specification | Stainless Steel | Indian Standard |
| ASTM A240 | Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate and Sheet | Stainless Spec | ASTM |
| IS 6285 | Methods for Chemical Analysis of Carbon and Low Alloy Steels | Test Method | Indian Standard |
| EN 10088 | Stainless Steels — List of Stainless Steels | European Standard | European Standard |