Quality Assurance Corrosion Resistance ASTM A276/En56D Martensitic Stainless Steel Bar for Surgical Instruments 420j2 Rod

• Customization: Available
• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN
• Model NO.: EN56D Rod/Bar
• Technique: Forged
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Surface Treatment: Polished
• Alloy: Alloy
• Special Use: Mold Steel, Free Cutting Steel, Cold Heading Steel
• Key Words: En56D Bar/Rod
• Thickness: 2mm - 100mm
• Outside Diameter: 4.0 - 1219mm
• Length: as Your Requirments
• Diameter Tolerance: H9, H11, H13, K9, K11, K13 etc
• Sample: Free-Sample
• Surface: Lack, Peeled, Polishing, Bright, Sand Blast, Hl
• MOQ: 100kgs
• Stock: in Stock
• Transport Package: Wooden Package
• Specification: EN56D
• Trademark: LORK
• Origin: China
• HS Code: 7219350000
• Production Capacity: 50000kg/Month

Product Description

Product Description

Introduction

Stainless steel grade 420J2 is inexpensive and highly corrosion resistant steel. It has good corrosion resistance in mild atmosphere as well as domestic and industrial environments. It is also resistant to dilute nitri acid, carbonic acid, ammonia, crude oil, detergent solutions, vinegar, food acids, several petroleum products, and steam.

Stainless steel grade 420J2 is known to possess good strength and reasonable impact resistant properties in hardened and tempered conditions when compared with 440 grades.

The following sections will discuss in detail about stainless steel grade 420J2.

Composition
The chemical composition of stainless steel grade 420J2 is outlined in the following table.

Element	Content (%)
Chromium, Cr	14
Nickel, Ni (optional)	1
Manganese, Mn	1
Silicon, Si	1
Phosphorus, P	0.04
Carbon, C	0.15-0.36
Sulfur, S	0.03
Iron, Fe	Balance

 

Grade Specification

Grade	UNS	DIN	EN	AMS	ASTM		JIS
420J2	S42000	-			ASTM A276		-

Other Designations

Other designations that are equivalent to stainless steel grade 420J2 include the following.

• BS970 Part3 1991 420S37
• BS970 Part4 1970/73 420S45
• BS970 1955 EN56C
• ASTM A276-98b 420
• EN56D
• AISI 420
• JIS G4303
• SUS 420 J1
• SAE 51420
• SUS 420 J2

Processing method

Machinability
Stainless steel grade 420J2 is machinable both in hardened and tempered conditions such as turning, drilling, and bending; however it is recommended that machining in hardened condition should be avoided as far as possible.

Welding
Welding of stainless steel grade 420J2 is easy. It is recommended that welding in annealed or hardened and tempered conditions should be avoided as it causes formation of brittleness, resulting in cold cracking due to contraction stresses.

Pre-heating and inter-pass temperature control during welding, followed by very slow cooling and post-weld annealing are good measures to take to prevent cracking.

Annealing
Annealing of this material can be performed by heating uniformly to 840-900°C (1544-1652°F) and held until the temperature is uniform throughout the section. Soaking and cooling is required.

Heat Treatment
Stainless steel grade 420J2 has to be heated uniformly to 730-790°C (1346-1454°F) and held until temperature is uniform throughout the section.

Hardening
Stainless steel grade 420J2 can be hardened by heating 950-1020°C (1742-1868°F) and held until temperature is uniform throughout the section. This should be followed by quenching in oil or air cooling. Tempering should be done when it is slightly warm.

Applications

Stainless steel grade 420J2 is used in the following application areas:

• Surgical instruments
• Daggers and swords
• Budget knives and diving knives
• Haircutting scissors and domestic scissors

 

Surface Treatment

 

 

 

Process

 

 

 

Main Applications

 

 

 

Company Profile

 

 

Packaging & Shipping

 

 

 

 

 

FAQ