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420 stainless steel is a higher carbon adaptation of 410; like most non-stainless steels it can be solidified by warmth treatment. 420 stainless will contain at least 12 for each penny chromium, sufficiently adequate to give it consumption resistance properties. It has great malleability in the tempered condition and is equipped for being solidified up to Rockwell Hardness 50HRC, the most elevated hardness of the 12 for each penny chromium grades. Its best erosion resistance is accomplished when the metal is solidified.

Martensitic stainless steels are streamlined for high hardness. Manufacture must be by systems that take into account poor weldability and as a rule additionally considered a last solidify and temper heat treatment. Consumption resistance is lower than the normal austenitic evaluations, and their valuable working temperature extent is restricted by their loss of flexibility at below zero temperatures and loss of quality by over-treating at raised temperatures.

ASTM A276 Stainless Steel 420 Bar & Rod, werkstoff nr. 1.4021 Square Bar, Forged Bar, Hex Bar, Polish Bar, Bright Bar, Black Bar Suppliers.

Standard	SS 420
UNS	S42000
WERKSTOFF NR.	1.4021
JIS	SUS 420 J1
BS	420S29
EN	X 20 Cr 13

Specification

Standard	420 / 1.4021
Range	3.17mm to 350mm dia
Designation	ASTM A276, ASME SA276
Finish	Bright, Black, Polish, Export Bright
Thickness	4.0mm - 100mm
Type	Bar, Bright Bar, Black Bars, Hex Bar, Square Bar, Rods, Polish Bar, Forged Bar, Round Bar
Length	Random, Fix & Cut Length

Chemical Composition

Grade	C	Mn	Si	P	S	Cr
420	Min. max.	0.15 -	- 1	- 1	- 0.040	- 0.03	12.0 14.0

Grade

420

Min.

max.

0.15

0.040

0.03

12.0

14.0

Mechanical Properties

Tempering Temperature (°C)	Tensile Strength (MPa)	Yield Strength 0.2% Proof (MPa)	Elongation (% in 50mm)	Hardness Brinell (HB)	Impact Charpy V (J)
Annealed *	655	345	25	241 max	-
204	1600	1360	12	444	20
316	1580	1365	14	444	19
427	1620	1420	10	461	#
538	1305	1095	15	375	#
593	1035	810	18	302	22
650	895	680	20	262	42
* Annealed tensile properties are typical for Condition A of ASTM A276; annealed hardness is the specified maximum. # Tempering of this steel should be avoided in the range 425-600°C

Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of thermal Expansion (m/m/0C)			thermal Conductivity (W/m.K)		Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
Grade	Density (kg/m3)	Elastic Modulus (GPa)	0-1000C	0-3150C	0-5380C	at 1000C	at 5000C	Specific Heat 0-1000C (J/kg.K)	Electrical Resistivity (n.m)
420	7800	200	10.3	10.8	11.7	24.9	-	460	550

TYPES OF STAINLESS STEEL 420 ROUND BARS & RODS