410 / 420 / 440C Stainless Steel Pipe | Martensitic Stainless Steel Tube | High Strength & Wear Resistance

🟧 Product Overview

Martensitic stainless steel pipes (410 / 420 / 440C) are heat‑treatable stainless steels known for:

• High strength
• High hardness
• Excellent wear resistance
• Moderate corrosion resistance
• Ability to be hardened by quenching and tempering

These grades are widely used in mechanical engineering, industrial tools, valves, shafts, pump components, and wear‑resistant systems.

🟧 Grade Overview

410 Stainless Steel Pipe (UNS S41000)

• General‑purpose martensitic stainless steel
• Good strength and moderate hardness
• Can be heat‑treated to 35–45 HRC
• Used for valves, pump shafts, mechanical components

420 Stainless Steel Pipe (UNS S42000)

• Higher carbon content → higher achievable hardness
• Can be heat‑treated to ~50 HRC
• Used for knives, surgical tools, wear‑resistant parts

440C Stainless Steel Pipe (UNS S44004)

• Ultra‑high carbon martensitic stainless steel
• Can be heat‑treated to 58–60 HRC
• Excellent wear resistance
• Used for bearings, precision tools, high‑wear components

🟧 Standards

• ASTM A312
• ASTM A268
• JIS G4303
• GB/T 1220

🟧 Product Specifications & Available Sizes

Outer Diameter (OD)

• Seamless: 6–530 mm
• Welded: 12–630 mm

Wall Thickness (WT)

• 1–30 mm

Length

• 6 m / 12 m / custom

Type

• Seamless (Cold Drawn / Hot Rolled)
• Welded (TIG / ERW)

Surface Finish Options

• Annealed
• Polished (180–400 grit)
• Pickled
• Heat‑treated finish

Dimensions (mm)
Ф21×4	Ф87×17.5	Ф121×19	Ф168×19
Ф21×4.5	Ф89×6-12	Ф124×6.5	Ф168×8
Ф22×6.5	Ф89×15	Ф127×10	Ф170×25
Ф25×8	Ф89×17	Ф127×13	Ф172×18
Ф28×8	Ф91×7.5	Ф127×8	Ф180×10
Ф30×10	Ф92×12	Ф130×12	Ф180×18
Ф30×8	Ф95×10	Ф130×18	Ф180×6
Ф32×8	Ф95×12	Ф133×6-12	Ф180×8
Ф34×6	Ф95×16	Ф133×18	Ф183×18
Ф34×8	Ф95×20	Ф140×8-12	Ф185×18
Ф38×10	Ф95×5.5	Ф140×15	Ф185×20
Ф38×8	Ф95×8	Ф140×20	Ф192×18
Ф40×10	Ф100×8.5	Ф142×18	Ф194×10
Ф40×8	Ф100×13	Ф145×18	Ф194×16
Ф42×5-10	Ф102×6-10	Ф146×10	Ф196×16
Ф45×6-12	Ф102×15	Ф146×12	Ф196×24
Ф48×5-10	Ф104×8.5	Ф152×10	Ф200×20
Ф50×8-12	Ф108×6-10	Ф152×12	Ф219×6-12
Ф51×10	Ф108×13	Ф152×14	Ф219×15
Ф55×10	Ф108×15	Ф152×20	Ф245×10
Ф57×6-10	Ф110×6	Ф152×6	Ф250×25
Ф60×6-12	Ф114×6-10	Ф152×8	Ф273×6-12
Ф65×6-12	Ф114×13	Ф159×6-10	Ф273×34
Ф68×6-12	Ф114×17.5	Ф159×12	Ф325×8-10
Ф70×8	Ф116×12	Ф159×15	Ф355×14
Ф70×10	Ф116×8	Ф159×18	Ф377×10
Ф76×6-12	Ф118×2	Ф159×22	Ф406×14
Ф80×8-12	Ф121×6-11	Ф168×10	Ф457×14
Ф83×8-12	Ф121×16	Ф168×12	Ф508×15

🟧 Chemical Composition

(Accurate per ASTM standards)

410

Element	Content (%)
C	0.08–0.15
Si	≤ 1.00
Mn	≤ 1.00
P	≤ 0.040
S	≤ 0.030
Cr	11.5–13.5
Ni	≤ 0.75

420

Element	Content (%)
C	0.16–0.25
Si	≤ 1.00
Mn	≤ 1.00
P	≤ 0.040
S	≤ 0.030
Cr	12.0–14.0
Ni	≤ 0.75

440C

Element	Content (%)
C	0.95–1.20
Si	≤ 1.00
Mn	≤ 1.00
P	≤ 0.040
S	≤ 0.030
Cr	16.0–18.0
Mo	≤ 0.75

🟧 Mechanical Properties

(Varies significantly by grade)

410

Property	Requirement
Tensile Strength	≥ 450 MPa
Yield Strength	≥ 280 MPa
Hardness	~35–45 HRC (heat‑treated)

420

Property	Requirement
Tensile Strength	≥ 700 MPa
Yield Strength	≥ 345 MPa
Hardness	~48–52 HRC (heat‑treated)

440C

Property	Requirement
Tensile Strength	≥ 760 MPa
Yield Strength	≥ 450 MPa
Hardness	~58–60 HRC (heat‑treated)

🟧 Physical Properties

Property	Value
Density	7.70–7.75 g/cm³
Melting Point	1480–1530°C
Magnetic	Yes
Thermal Conductivity	24–28 W/m·K

🟧 Manufacturing Processes

• Hot Rolling
• Cold Drawing
• TIG Welding
• Heat Treatment (Quenching & Tempering)
• Annealing
• Polishing
• Eddy Current Testing
• Hydrostatic Testing

🟧 Primary Industry Usage

• Mechanical engineering components
• Pump shafts & valve parts
• Industrial knives & cutting tools
• Bearings & wear‑resistant parts
• Oil & gas equipment
• High‑strength structural components

🟧 Why Use Martensitic Stainless Steel Pipe

• High strength and hardness
• Excellent wear resistance
• Heat‑treatable for tailored performance
• Suitable for mechanical and industrial applications
• Higher hardness options (420 / 440C) for demanding environments

🟧 Why Choose WelSteels

• Full range of martensitic stainless steel grades
• Strict quality control with MTC 3.1
• Heat‑treatment capability for custom hardness levels
• Seamless & welded options available
• Global shipping with professional loading supervision
• Competitive pricing for industrial applications

International Standard of Stainless Steel

NO	China	Japan	America		Korea	Germany	India	Australia
	GB	JIS	ASTM	UNS	KS	DIN	BIS	AS	CNS
Austenitic Stainless Steel
1	12Cr17Mn6Ni5N	SUS201	201	S20100	STS201	1.4372	10Cr17Mn6Ni4N20	201-2	201
2	12Cr18Mn9Ni5N	SUS202	202	S20200	STS202	1.4373	–	–	202
3	12Cr17Ni7	SUS301	301	S20200	STS301	1.4319	10Cr17Ni7	301	301
4	06Cr19Ni10	SUS304	304	S30400	STS304	1.4301	07Cr18Ni9	304	304
5	022Cr19Ni10	SUS304L	304L	S30403	STS304L	1.4306	02Cr18Ni11	304L	304L
6	06Cr19Ni10N	SUS304N1	304N	S30451	STS304N1	1.4315	–	304N1	304N1
7	06Cr19Ni9NbN	SUS304N2	XM21	S30452	STS304N2	–	–	304N2	304N2
8	022Cr19Ni10N	SUS304LN	304LN	S30453	STS304LN	–	–	304LN	304LN
9	10Cr18Ni12	SUS305	305	S30500	STS305	1.4303	–	305	305
10	06Cr23Ni13	SUS309S	309S	S30908	STS309S	1.4833	–	309S	309S
11	06Cr25Ni20	SUS310S	310S	S31008	STS310S	1.4845	–	310S	310S
12	06Cr17Ni12Mo2	SUS316	316	S31600	STS316	1.4401	04Cr17Ni12Mo2	316	316
13	06Cr17Ni12Mo2Ti	SUS316Ti	316Ti	S31635	–	1.4571	04Cr17Ni12MoTi20	316Ti	316Ti
14	022Cr17Ni12Mo2	SUS316L	316L	S31603	STS316L	1.4404	~02Cr17Ni12Mo2	316L	316L
15	06Cr17Ni12Mo2N	SUS316N	316N	S31651	STS316N	–	–	316N	316N
16	022Cr17Ni13Mo2N	SUS316LN	316LN	S31653	STS316LN	1.4429	–	316LN	316LN
17	06Cr18Ni12Mo2Cu2	SUS316J1	–	–	STS316J1	–	–	316J1	316J1
18	022Cr18Ni14Mo2Cu2	SUS316J1L	–	–	STS316J1L	–	–	–	316J1L
19	06Cr19Ni13Mo3	SUS317	317	S31700	STS317	–	–	317	317
20	022Cr19Ni13Mo3	SUS317L	317L	S31703	STS317L	1.4438	–	317L	317L
21	06Cr18Ni11Ti S	SUS321	321	S32100	STS321	1.4541	04Cr18Ni10Ti20	321	321
22	06Cr18Ni11Nb	SUS347	347	S34700	STS347	1.4550	04Cr18Ni10Nb40	347	347
Duplex Stainless Steel
1	–	SUS329J1	329	S32900	STS329J1	1.4477	–	329J1	–
2	022Cr23Ni5Mo3N	–	S32205	F60	–	1.4462	–	2205	2205
3	022Cr25Ni7Mo4N	–	S32750	F53	–	1.4410	–	2507	2507
Ferrite stainless steel
1	06Crl3Al	SUS405	405	S40500	STS405	1.4002	04Cr13	405	405
2	022Cr11Ti	SUH409	409	S40900	STS409	1.4512	–	409L	409L
3	022Cr12	SUS410L	–	–	STS410L	–	–	410L	410L
4	10Cr17	SUS430	430	S43000	STS430	1.4016	05Cr17	430	430
5	10Cr17Mo	SUS434	434	S43400	STS434	1.4113	–	434	434
6	022Cr18NbTi	–	–	S43940	–	1.4509	–	439	439
7	019Cr19Mo2NbTi	SUS444	444	S44400	STS444	1.4521	–	444	444
Martensitic Stainless Steel
1	12Cr12	SUS403	403	S40300	STS403	–	–	403	403
2	12Cr13	SUS410	410	S41000	STS410	1.4006	12Cr13	410	410
3	20Cr13	SUS420J1	410	S42000	STS420J1	1.4021	20Cr13	420	420J1
4	30Cr13	SUS420J2	–	–	STS420J2	1.4028	30 Cr13	420J2	420J2
5	68Cr17	SUS440A	440A	S44002	STS440A	–	–	440A	440A