420 Stainless Steel Sheet – The World’s #1 Cutlery & Surgical-Grade Martensitic Sheet (HRC 56 After Heat Treatment)

When your product demands maximum hardness, wear resistance, and still-affordable stainless, 420 Stainless Steel Sheet is the undisputed champion. With 0.15–0.40 % carbon, this martensitic grade delivers up to HRC 56 after quench & temper, excellent wear resistance, and good corrosion resistance in mild environments—all while remaining fully magnetic and 30–40 % cheaper than 304. From high-end kitchen knives and surgical scalpels to plastic molds and mining wear plates, 420 stainless steel sheet offers the best hardness-to-price ratio in the stainless world—making it the first choice for knife factories, surgical instrument makers, and global traders who prioritize performance and economy.

Caption: Premium 420 Stainless Steel Sheet – 8K Mirror Finish, Ideal for High-End Cutlery & Surgical Blades

Key Features & Benefits

Martensitic structure – up to HRC 56 after heat treatment
Highest hardness among standard stainless grades
Excellent wear resistance – ideal for cutting edges, molds, shafts
Good corrosion resistance in mild indoor and urban atmospheres
Fully magnetic – suitable for induction heating & sensor apps
Lowest stainless price – 30–40 % cheaper than 304
Wide finish range – mirror, No.4, BA, 410 BA stainless steel sheet equivalent

Technical Specifications

Table 1 – Chemical Composition (ASTM A240)

Element	420 %	410 %	440C %	304 %
Cr	12.0–14.0	11.5–13.5	16.0–18.0	18.0–20.0
Ni	≤0.75	≤0.75	≤0.75	8.0–10.5
C	0.15–0.40	≤0.15	0.95–1.20	≤0.08
Mn	≤1.00	≤1.00	≤1.00	≤2.00
Fe	Balance	Balance	Balance	Balance

Table 2 – Mechanical Properties (ASTM A480)

Condition	Yield MPa	Tensile MPa	Hardness HRC	Standard
Annealed	≥345	≥635	≤22	ASTM A240
Q&T 300 °C	≥1200	≥1400	52–56	ASTM A240
Q&T 500 °C	≥1000	≥1200	45–50	ASTM A240

Quench 980–1050 °C, oil/air; temper 200–600 °C.

Size & Finish Range

Cold Rolled

Thickness (mm)	Width (mm)	Finish Options	Standard
0.1–1.0	1000–1250	2B, BA, No.4, 8K	ASTM A240
1.0–3.0	1000–1524	2B, No.4, HL	ASTM A240
3.0–6.0	1000–2000	No.4, HL	ASTM A240

Hot Rolled

Thickness (mm)	Width (mm)	Finish Options	Standard
3.0–12	1250–2000	No.1, pickled	ASTM A240
12–50	1500–2500	No.1, HRAP	ASTM A240
50–100	1500–3000	No.1, forged	ASTM A240

Custom lengths 1000–12000 mm, cut-to-size available.

Product Range & Market Info

As the largest 410 hot rolled stainless steel sheet manufacturer & 410 hot rolled stainless steel sheet wholesaler in China, we operate a 400 000 t/year Steckel mill with in-house quenching & tempering lines dedicated to 410 stainless steel sheet production. Our 250 000 m² facility keeps 60 000 t of ready stock in Shanghai and Houston, ensuring immediate availability for global knife makers and surgical instrument producers. Whether you need one coil of 2 mm × 1219 mm or a full plate of 50 mm × 2500 mm, our mill-direct 410 cold rolled stainless steel sheet price and ISO-approved quality give you the competitive edge. Contact our export team today for the most updated 420 stainless steel sheet pricelist and downloadable 3.1 MTC.

Specialty products include complete 410 BA stainless steel sheet – mirror-finish Ra ≤0.2 µm, manufactured under ASTM A240.

Caption: 420 Hot Rolled Stainless Steel Sheet – Mill-Direct from Leading 420 Hot Rolled Stainless Steel Sheet Manufacturer & Wholesaler

Main Applications

Kitchen knives – blades, cleavers, scissors
Surgical instruments – scalpels, forceps, clamps
Dental & medical tools – drills, chisels
Industrial blades – plastic, paper, textile
Plastic molds – injection, blow, extrusion
Pump & valve parts – shafts, plungers, seats
Fasteners & bolts – high-strength, magnetic
Measuring tools – calipers, gauges
Wear plates – mining, quarrying, crushing

Why Choose Us – Martensitic Specialist

Mill-direct pricing – 30–40 % cheaper than 304
400 000 tons annual martensitic capacity – 5-day lead time
ISO 9001 & PED certified – EN 10204 3.1 & 3.2 MTC supplied
In-house quenching & tempering furnaces – hardness up to 56 HRC
Same-day cutting & polishing – tolerances ±0.2 mm, mirror finish
Real-time 420 stainless steel sheet pricelist – updated daily at 08:00 CST

Caption: Massive Stock & Daily Updated 420 Stainless Steel Sheet Pricelist – Trusted 420 Stainless Steel Sheet Suppliers Worldwide

Grade Comparison Table: 420 vs 410 vs 420J2 vs 440A/C vs 304

Grade	Cr %	C %	Hardness HRC (Q&T)	Relative Cost	Best Use
420	12–14	0.15–0.40	52–56	0.65×	Cutlery, surgical
410	11.5–13.5	≤0.15	45–50	0.6×	Valves, fasteners
420J2	12–14	0.26–0.35	50–54	0.7×	Budget blades
440A/C	16–18	0.60–1.20	58–60	2.0×	Premium blades
304	18–20	≤0.08	≤22	1.0× (base)	General corrosion

FAQ – 420 Stainless Steel Sheet

What is the latest 420 stainless steel sheet pricelist?
Mill-direct FOB China USD 2.00–2.40/kg depending on carbon surcharge; fixed for 48 h.
Heat treatment guide?
Quench 980–1050 °C, oil or air; temper 200–600 °C to achieve 45–56 HRC.
Hardness range after tempering?
45–56 HRC at 200–400 °C; decreases above 500 °C for toughness.
Stock thickness range?
410 cold rolled stainless steel sheet company stock 0.1–6 mm, 410 hot rolled stainless steel sheet manufacturer 3–100 mm – 60 000 t ready.
BA vs 2B finish?
410 BA stainless steel sheet is bright annealed mirror-like; 2B is matte cold-rolled.
Minimum order quantity?
One sheet for stock sizes; full container (≈25 t) for mill-direct custom thickness.
Which certificates accompany the shipment?
EN 10204 3.1/3.2 MTC, ISO 9001, PED 2014/68/EU, and third-party inspection (SGS/TÜV/BV).
Do you export worldwide?
Yes, to 80+ countries including UK, Germany, India, UAE, South Korea, and Australia.

Call-to-Action

Stop paying nickel premiums. Contact the largest 420 stainless steel sheet manufacturer today for the latest 420 stainless steel sheet pricelist, immediate access to massive 420 stainless steel sheet raw material stock, and same-day cutting of any thickness.

420 Stainless Steel Plate – Premium Martensitic Grade for Maximum Hardness & Surgical-Grade Applications

Meta Description: 420 Stainless Steel Plate – highest hardness up to 55 HRC after heat treatment. Competitive 420 stainless steel plate price from the best 420 stainless steel plate distributor. Download 420 stainless steel data sheet.

Introduction – Why Choose 420 Stainless Steel Plate?

When your application demands maximum hardness, surgical-grade polishability, and cost-effective martensitic strength, 420 Stainless Steel Plate is the ultimate solution. With 0.15–0.40 % carbon, this martensitic 420 stainless steel plate delivers up to 55 HRC after quenched and tempered 420 stainless steel plate heat treatment**, excellent wear resistance, and good corrosion resistance in mild environments — all while remaining 30–40 % cheaper than 440C. Whether you need 420 stainless steel plate for surgical scalpels, industrial shear blades, or plastic injection molds, our mill-direct supply ensures full traceability, rapid delivery, and competitive 420 stainless steel plate price.

[Image Placeholder 1: Close-up of polished and quenched 420 stainless steel plate showing mirror-like surface and mill markings]
Alt text: Polished and Quenched 420 Stainless Steel Plate – Mirror Finish, Hardness up to 55 HRC

Product Overview & Key Benefits

Martensitic structure – fully magnetic, ideal for sensors & induction heating
Maximum hardness – up to 55 HRC after 420 stainless steel heat treatment
Excellent wear resistance – cutting edges, molds, shafts, surgical instruments
Good corrosion resistance in mild urban & indoor atmospheres
Surgical-grade polishability – Ra ≤0.1 μm mirror finish
Cost-effective – 30–40 % cheaper than 440C
Global supply – best 420 stainless steel plate distributor network to 80+ countries

Chemical Composition of 420 Stainless Steel Plate

Element	Min %	Max %
Cr	12.0	14.0
Mn	—	1.00
Si	—	1.00
C	0.15	0.40
P	—	0.04
S	—	0.03
Fe	Balance	Balance

High carbon enables maximum hardness; see 420 vs 410 vs 440C stainless steel comparison below.

Mechanical & Physical Properties

Table 1 – Room Temperature Properties (ASTM A240)

Condition	Yield MPa	Tensile MPa	Elongation %	Hardness HRC
Annealed	≥345 MPa	≥635 MPa	≥20 %	≤22
Quenched & Tempered 300 °C	≥1000 MPa	≥1400 MPa	≥12 %	52–55
Quenched & Tempered 500 °C	≥800 MPa	≥1200 MPa	≥15 %	45–50

Quench 980–1050 °C, oil/air; temper 200–600 °C.

Table 2 – Physical Properties

Property	Value
Density	7.7 g/cm³
Thermal Conductivity	25 W/m·K
Thermal Expansion	10.4 µm/m·K (20–100 °C)
Magnetic Permeability	Fully magnetic

Data extracted from official 420 stainless steel data sheet.

410 vs 410S vs 420 vs 440C Comparison Table

Feature	410	420	440C
Structure	Martensitic	Martensitic	Martensitic
Max Temp	815 °C	815 °C	815 °C
Hardness (Q&T)	40–50 HRC	52–55 HRC	58–60 HRC
Price Ratio	0.65×	0.7×	2.0×
Weldability	Fair	Fair	Poor
Best Use	Valves, fasteners	Cutlery, surgical	Premium blades

Choose 420 stainless steel plate for ultimate hardness; choose 410 for cost-effective strength.

Available Sizes & Surface Finishes

Thickness (mm)	Width (mm)	Length (mm)	Finish
0.3–3.0	1000–1524	2000–6000	2B, BA
3.0–12.0	1250–2000	2000–12000	No.1
12–50	1500–2500	2000–12000	HRAP
50–100	1500–3000	2000–12000	Forged

Custom cut-to-size available.

Detailed Heat Treatment Guide for 420 Stainless Steel

Annealing: 800–900 °C, air cool → ≤22 HRC
Quenching: 980–1050 °C, oil or air → ≥40 HRC
Tempering: 200–400 °C → 52–55 HRC (optimal 300 °C)
Post-weld: Optional for most services; use 309 or 420 filler

Full 420 stainless steel heat treatment guide downloadable upon request.

Key Applications & Industries

Surgical instruments – scalpels, forceps, clamps (420 surgical stainless steel plate)
Cutlery & kitchen knives – blades, cleavers, scissors
Industrial blades – plastic, paper, textile shears
Plastic molds – injection, blow, extrusion
Valves & pump parts – shafts, plungers, seats
Turbine blades – steam, gas, hydro
Fasteners & bolts – high-strength, magnetic
Mining wear plates – quarry liners, crusher parts
High-carbon 420 stainless steel – premium hardness applications

[Image Placeholder 2: Infographic of 420 stainless steel data sheet + heat treatment curve showing hardness vs tempering temperature]
Alt text: 420 Stainless Steel Data Sheet + Heat Treatment Curve – Hardness vs Tempering Temperature

Why We Are the Best 410 Stainless Steel Plate Distributor

Mill-direct pricing – 30–40 % cheaper than 440C
400 000 t annual martensitic capacity – 5-day lead time
ISO 9001 & PED certified – EN 10204 3.1 & 3.2 MTC supplied
In-house quenching & tempering furnaces – hardness up to 55 HRC
Same-day cutting & polishing – tolerances ±0.2 mm, mirror finish
Real-time stock portal – 24/7 visibility for 420 stainless steel plate price

[Image Placeholder 3: Real-world application collage showing 420 plates used in surgical scalpels, industrial shear blades, and injection molds]
Alt text: Real Applications of 420 Stainless Steel Plate – Surgical Scalpels, Industrial Shear Blades, Injection Molds

FAQ – 420 Stainless Steel Plate

Q1: What is the maximum hardness of 420 stainless steel plate?
A: Up to 55 HRC after quenched and tempered 420 stainless steel plate at 300 °C.

Q2: What is the difference between 420 vs 410 vs 440C stainless steel?
A: 420 has 0.15–0.40 % C for 52–55 HRC; 410 has ≤0.15 % C for 40–50 HRC; 440C has 0.95–1.20 % C for 58–60 HRC.

Q3: Is 420 stainless steel magnetic?
A: Fully martensitic – ideal for sensors & induction heating.

Q4: Is 420 stainless steel food safe?
A: Yes – 420 surgical stainless steel plate meets FDA/3A for surgical & food contact.

Q5: What is the latest 420 stainless steel plate price?
A: Mill-direct FOB China USD 2.40–2.80/kg depending on carbon surcharge; fixed for 48 h.

Q6: What certificates accompany the shipment?
A: EN 10204 3.1 & 3.2 MTC, ISO 9001, PED 2014/68/EU, and third-party inspection (SGS/TÜV/BV).

Q7: What is the minimum order quantity?
A: One sheet for stock sizes; full container (≈25 t) for mill-direct custom thickness.

Q8: Do you export worldwide?
A: Yes – to 80+ countries including UK, Germany, India, UAE, South Korea, and Australia.

Conclusion + Strong Call-to-Action

Stop paying 440C premiums. Contact the most trusted 420 stainless steel plate supplier today for the latest 420 stainless steel plate price, immediate access to massive 420 stainless steel sheets stock, and same-day cutting of any thickness or finish.