ASTM A480 440A 440B 440C stainless steel sheet used for knives

Product Description

• Item: ASTM A480 440A 440B 440C stainless steel sheet used for knives
• Standard: ASTM A240,ASTM A480,ASTM A167,ASTM A176
• Material: 201,202,301,304,304L,304N,XM21,304LN,305,309S,310S,316,316Ti,316L,316N,316LN,317,317L,321,347,329,405,409,430,434,444,403,410,420,440A,etc.
• Specifications:
• Thickness: 0.01-200mm
• Width: 1m,1.22m,1.5m and 1.8m.
• Length: 2m,2.44m,5.8m,6m.
• Surface: No.1, 2B, BA, NO.4, 8K mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc.

What is 440 stainless steel?

The carbon content and hardness of 440A-440B-440C are gradually increased from A-B-C (A-0.75%, B-0.9%, C-1.2%). 440C is an excellent high-end stainless steel, and its hardness usually reaches 56-58RC. All three steels have good rust resistance, 440A is the best, and 440C is the lowest. 440C is very common.

Datasheet for 440 Stainless steel

Grade Specification Comparison

Applications

Grade 440 stainless steels find applications in the following:

• Chisels
• Surgical equipment
• High quality knife blades
• Valve seats
• Rolling element bearings

Surface

1D—The surface has discontinuous particles, which is also called matte. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.

2D—Slightly shiny silver-white. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.

2B—Silver white and better gloss and flatness than 2D surface. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + quenching and tempering rolling.

BA—The surface gloss is excellent and has a high reflectivity, just like the mirror surface. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + surface polishing + quenched and tempered rolling.

No.3—has better gloss and rough surface. Processing technology: Polishing and tempering rolling of 2D products or 2B with 100 ~ 120 abrasive materials.

No.4—has better gloss and fine lines on the surface. Processing technology: Polishing and tempering rolling of 2D products or 2B with 150 ~ 180 abrasive materials.

HL—Silver gray with hair streaks. Processing technology: Polish the 2D product or 2B product with a suitable size of abrasive material to make the surface appear continuous grain.

MIRRO—is in a mirror state. Processing technology: 2D or 2B products are ground and polished to a mirror effect with a suitable abrasive material.

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