We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

OEM Alloy Steel Square Bar: 3.5 in Thick, 0 in/-0.008 in, 3 1/2 in x 12 in Nominal Size (WxL) - High-Strength 4140 Alloy Steel Flat Bars
OEMHigh-Strength 4140 Alloy Steel Flat Bars

OEM Alloy Steel Square Bar: 3.5 in Thick, 0 in/-0.008 in, 3 1/2 in x 12 in Nominal Size (WxL)

The APPROVED VENDOR Alloy Steel Square Bar is a high-strength 4140 alloy steel flat bar, cold rolled and heat treatable, with a nominal size of 3 1/2 in x 12 in and a thickness tolerance of 0 in/-0.008 in. It…

SKU 3G-OTH-591400

Also listed as: 40S3512 · 40S3 5 12 · 40S3-5-12

Brand
OEM
Item
Alloy Steel Square Bar: 3.5 in Thick, 0 in/-0.008 in, 3 1/2 in x 12 in Nominal Size
Category
High-Strength 4140 Alloy Steel Flat Bars
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

OEM
Manufacturer Part Number
40S3.5-12
Type
0 in/-0.008 in, Mill
Fabrication
Cold Rolled
Heat Treatable
Heat Treatable
Nominal Size (WxL)
3 1/2 in x 12 in
Thickness Tolerance
0 in/-0.008 in
Certifications Included
Material Certificate with Lot Number

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

OEM Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The APPROVED VENDOR Alloy Steel Square Bar is a high-strength 4140 alloy steel flat bar, cold rolled and heat treatable, with a nominal size of 3 1/2 in x 12 in and a thickness tolerance of 0 in/-0.008 in. It includes a Material Certificate with Lot Number for traceability. 3G Electric interprets your demand for this mill-finished bar and delivers it across 14 industrial departments, with specialist depth in combustion, pumps and controls as an authorised distributor.

Frequently Asked Questions

What is the APPROVED VENDOR Alloy Steel Square Bar used for?

This high-strength 4140 alloy steel square bar is used for machining shafts, gears, and tooling components in industrial applications. Its cold-rolled finish and heat-treatable property make it suitable for parts requiring wear resistance and dimensional stability.

What are the specifications of the APPROVED VENDOR Alloy Steel Square Bar?

The bar is cold-rolled 4140 alloy steel, nominal size 3 1/2 in x 12 in, with a thickness tolerance of 0 in/-0.008 in. It is heat treatable and includes a Material Certificate with Lot Number for traceability. The manufacturer part number is 40S3.5-12.

Where to buy the APPROVED VENDOR Alloy Steel Square Bar worldwide?

3G Electric supplies the APPROVED VENDOR Alloy Steel Square Bar worldwide. We handle full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source this bar across 14 departments, including specialist expertise in combustion, pumps, and controls.

How to select the right alloy steel square bar for machining?

Select based on required strength, heat treatability, and dimensional tolerance. For precision parts, choose cold-rolled bars like this 4140 alloy with tight thickness tolerance. Verify the material certificate for traceability. 3G Electric can help match your application needs across our industrial supply network.

OEM Products

3G Electric supplies OEM high-strength 4140 alloy steel flat bars. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
APPROVED VENDOR Round Threading Die: #8-40 UNS, 1 in OD, Solid, High Speed Steel (MPN 13032)
APPROVED VENDOR Round Threading Die: #8-40 UNS, 1 in OD, Solid, High Speed Steel (MPN 13032)
APPROVED VENDOR Round Threading Die: 3/8"-18 UNS, 1 in OD, Solid, High Speed Steel (MPN 13118)
APPROVED VENDOR Round Threading Die: 3/8"-18 UNS, 1 in OD, Solid, High Speed Steel (MPN 13118)
APPROVED VENDOR Round Threading Die: #10-40 UNS, 1 in OD, Solid, High Speed Steel (MPN 13042)
APPROVED VENDOR Round Threading Die: #10-40 UNS, 1 in OD, Solid, High Speed Steel (MPN 13042)
APPROVED VENDOR Round Threading Die: #12-32 UNEF, 1 in OD, Solid, High Speed Steel (MPN 13052)
APPROVED VENDOR Round Threading Die: #12-32 UNEF, 1 in OD, Solid, High Speed Steel (MPN 13052)
APPROVED VENDOR Round Threading Die: 1/2"-40 UNS, 1 1/2 in OD, Solid, High Speed Steel (MPN 13182)
APPROVED VENDOR Round Threading Die: 1/2"-40 UNS, 1 1/2 in OD, Solid, High Speed Steel (MPN 13182)
APPROVED VENDOR Round Threading Die: 1/2"-12 UNS, 1 1/2 in OD, Solid, High Speed Steel (MPN 13162)
APPROVED VENDOR Round Threading Die: 1/2"-12 UNS, 1 1/2 in OD, Solid, High Speed Steel (MPN 13162)