// MATERIAL GRADE //
4140 Steel Hardening Service India
Precision induction hardening for AISI 4140 (EN19 / 42CrMo4 / SCM440) chromium-molybdenum steel — shafts, tooling, dies, mold bases & OEM export components. 54–60 HRC. Certified Rockwell reports.
54–60 HRC. OEM. Export. Certified.
Looking for a dependable 4140 steel hardening service in India? AISI 4140 is the world’s most specified chromium-molybdenum engineering steel — known as EN19 in British and Indian standards, 42CrMo4 in German DIN, and SCM440 in Japan. OEM procurement teams, export units and Tier-1 suppliers specify it by AISI designation. Thakur Industries provides precision induction hardening for AISI 4140 steel with documentation that satisfies international quality requirements — 54–60 HRC, certified Rockwell test reports and batch traceability. Accepted from Punjab, Haryana and Delhi NCR, and shipped all-India to OEM and export manufacturers.
4140 Applications
AISI 4140 is used wherever engineering drawings call for a universally understood alloy grade — OEM automotive assemblies for export, mold bases and die tooling, hydraulic and pneumatic component shafts, fastener forgings, and heavy-duty machine components. We accept drawings that specify 4140 and process to exact surface hardness and case depth requirements.
4140 for OEM & Export Work
- Internationally recognised AISI grade — no conversion needed
- Documentation matches OEM quality system requirements
- Batch HRC test reports with part and heat numbers
- Consistent results across multi-lot export shipments
- Accepted from all-India customers via courier or transport
// SPECIFICATIONS //
4140 Hardening Specifications
| Material Grade | AISI 4140 / EN19 (709M40) / 42CrMo4 / SCM440 |
|---|---|
| Composition | 0.38–0.43% C · 0.8–1.1% Cr · 0.15–0.25% Mo |
| Surface Hardness | 54–60 HRC (induction hardened) |
| Case Depth | 0.5 mm – 4.0 mm (controlled to spec) |
| Process | Selective induction hardening |
| Components | Shafts, axles, gears, mold bases, dies, pins, bushings |
| Quench Medium | Polymer / water-based, controlled |
| Turnaround | 2–4 working days (standard) |
| Testing | Certified Rockwell HRC reports, case-depth & dimensional check |
| Service Area | Ludhiana, Punjab, Haryana, Delhi NCR · All-India · Export |
// HRC RANGE //
4140 Induction Hardening HRC Range
The 4140 induction hardening HRC range is defined by its chromium-molybdenum chemistry. AISI 4140 (EN19 / 42CrMo4 / SCM440) reaches 54–60 HRC at the surface with deep hardenability suited to OEM and export work — the table below summarises the hardness, case depth, alloy content and austenitizing temperature for your drawing.
| Property | Value |
|---|---|
| Surface Hardness | 54–60 HRC |
| Core Hardness | 28–38 HRC (hardened & tempered) |
| Case Depth | 0.5–4 mm (controlled to spec) |
| Alloy Content | 0.38–0.43% C · 0.8–1.1% Cr · 0.15–0.25% Mo |
| Austenitizing Temp | 840–870 °C |
// PRICING & TURNAROUND //
4140 Hardening Cost & Lead Time
We offer competitive 4140 steel hardening rates for both prototype batches and bulk OEM and export production. Final pricing depends on component weight, cross-section, case depth and quantity — share your drawing for an exact quote within 24 hours.
Pricing Basis
Per kg or per piece (INR), with reduced rates on bulk and repeat OEM and export orders.
Minimum Order
No rigid MOQ — single trial parts to multi-thousand-piece export lots accepted.
Turnaround
Standard 2–4 working days; urgent same-week jobs for regular clients.
// WHY CHOOSE US //
Why OEMs & Exporters Trust Thakur Industries
Consistent 54–60 HRC
Repeatable surface hardness on every 4140 batch, lot after lot.
Certified Documentation
Rockwell HRC reports with heat and part numbers for export QA.
Export-Ready
Grade designations and reports accepted by international buyers.
Fast Turnaround
2–4 day standard delivery keeps your production line running.
4140 Mold Bases & Die Tooling
4140 mold bases, press tool components, die pillars and guide bushings are regularly processed. We use selective induction hardening to harden only the wear surfaces — bores, wear pads and parting-line areas — while leaving bolt holes and non-critical zones soft for machining. This prevents warping of large flat plates.
- Selective hardening of wear surfaces only
- Bolt holes and machined zones left soft
- Minimal distortion on large flat plates
- Hardening-zone mapping to your drawing
Related Material Grades
AISI 4140 Hardening FAQs
Learn more about the metallurgy of chromium-molybdenum steels and surface hardening from the ASM International heat-treatment resources.
Last updated: June 2026 · Thakur Industries, Ludhiana, Punjab
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