Here is the production process of WH60 low alloy high strength steel, a Chinese-grade steel used in high-strength structures such as construction machinery, mining equipment, and bridges. The process integrates alloy design, rolling technology, and heat treatment to meet requirements for high strength, toughness, and weldability. Below are the main production steps and key technical points:

I. Smelting Process

1. Charge Preparation

Raw materials primarily include iron ore and scrap steel, supplemented with alloy materials (e.g., manganese, silicon, niobium, vanadium, titanium). The goal is to precisely control the chemical composition, especially the carbon content (typically ≤0.2%) and alloy element ratios, to balance strength and weldability.

Key Points: Reduce impurities such as sulfur and phosphorus (S≤0.025%, P≤0.025%) to minimize hot and cold brittleness and improve toughness.

2. Smelting Equipment

Typically uses converter smelting or arc furnace smelting, combined with secondary refining (e.g., LF furnace, VD furnace):

LF Furnace (Ladle Furnace): Desulfurization, deoxidation, and fine-tuning of alloy composition; controls the morphology and distribution of inclusions.

VD Furnace (Vacuum Degassing): Reduces hydrogen content in steel (≤2ppm) to avoid hydrogen-induced cracking while further purifying the molten steel.

3. Chemical Composition Control

Roles of typical alloy elements:

Mn (Manganese): Solid solution strengthening to improve strength, usually 1.0%–1.6% content.

Si (Silicon): Auxiliary strengthening, 0.2%–0.55% content, but excessive amounts reduce toughness.

Nb (Niobium), V (Vanadium), Ti (Titanium): Microalloying elements that enhance strength and toughness through precipitation strengthening and grain refinement (forming carbonitrides), typically ≤0.15% content.

C (Carbon): Strictly controlled to low levels (≤0.18%) to reduce carbon equivalent (CEV) and improve weldability.

 

 

 

 

Specification we supply：

Thickness	3-200mm
Width	1500-4000mm
Length	5000-15000mm

 

 

 

 

 

 

 

 

 

 

Why Choose Us?
We take pride in our ability to provide custom solutions for our customers' unique needs.
We analyze and compare the previous products and the current technical situation of our WH60 Low Alloy High Strength Steel, and develop new technical specifications and processes.
Our customers trust us to deliver high-quality Cold-rolled Steel products on time and on budget.
We strictly implement the warm and thoughtful after-sales service, adhere to the development of good professional ethics.
We offer a wide range of Cold-rolled Steel products to meet diverse customer needs.
We adhere to the customer-centric and brand-oriented business philosophy, and continue to provide customers with reliable and excellent products and services.
Our factory is committed to upholding the highest standards of safety and quality.
All staff of our company and all departments work together to combine business management, professional technology, quantitative statistical methods and ideological education.
Our Cold-rolled Steel products are known for their durability and reliability.
Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

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