GradeCompass

WHY THE RIGHT GRADE MATTERS

₹14.15 lakh crIndia's yearly cost of corrosion, 4.3% of GDPCII–Nomura Research Institute, Sep 2026

120+ gradesin Jindal's range, each chosen on seven variablesJSL Integrated Report FY26

1,649customer complaints in FY25, each needing technical reviewJSL BRSR FY25

Too weak a grade corrodes early; too strong a grade wastes money. GradeCompass picks the grade that is safe for the location and cheapest over its service life.

1Read the environment. The location sets a corrosivity class (ISO 9223 scale).

2Remove unsafe grades. Pitting, temperature, welding, microbial and hydrogen risks rule grades out.

3Rank by real cost. Safe grades are ranked by price per kg and per year of service. If none is safe, the enquiry goes to a Jindal expert.

Scenarios

Your project

What are you building?

Project location

Fabrication

Product will be welded

How important is cost?

LowMEDIUMCritical

1 · Environment

2 · Unsafe grades removed

3 · Ranking

4 · Cost per year of service

Edit ₹/kg to use your own quote

5 · Save or share

PROOF · WORKING PROTOTYPE

6/6demo scenarios place the grade used in industry practice in the top 2 756/756test cases give identical results in Python, JavaScript and this page 0random or AI components: the same input always gives the same answer

Code and test: github.com/grv-io/gradecompass (poc/parity_test.py)

Prototype scope & assumptions

Scope: 12 grades, 12 districts, 7 applications. The full build covers 120+ grades and ~800 districts.
Corrosivity: ISO 9223-style class from distance to coast, humidity, rainfall and SO₂ (IMD, ERA5, CPCB and CSIR-CECRI data in the full build).
Prices: indicative ex-mill (₹175/kg for grade 430 as baseline). Stockist quotes can be higher; edit ₹/kg to test.
Service life: engineering estimate from PREN margin, not a standards model.
Ranking weights: to be calibrated by a Jindal metallurgist panel (target ≥ 95% top-3 agreement on 200+ real enquiries).
Not yet checked: stress-corrosion cracking, crevice and galvanic corrosion; BIS / ASME / RDSO certification.