ASTM 440C Stainless Steel Sheet A480 440A 440B For Knives Cold / Hot Rolled
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
| Chemical Composition | |||||||
| Material | C | Si | Mn | P | S | Cr | Mo |
| 440A | 0.60~0.75 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 16.0~18.0 | ≤0.75 |
| 440B | 0.75~0.95 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 16.0~18.0 | ≤0.75 |
| 440C | 0.95~1.20 | ≤1.00 | ≤1.00 | ≤0.040 | ≤0.030 | 16.0~18.0 | ≤0.75 |
Grade Specification Comparison
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 440A | S44002 | - | - | SUS 440A | |||
| 440B | S44003 | 1.4112 | X90CrMoV18 | SUS 440B | |||
| 440C | S44004 | - | - | 1.4125 | X105CrMo17 | - | SUS 440C |
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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