Material number · Europe · 19 designations

1.7707

1.7707 is the material number of the grade also listed as 30CrMoV9. It is a material in the category Quenched and tempered steels. We list 19 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, SAE AMS, GOST, ČSN, PN and SRPS.

Material no. 1.7707
Category Quenched and tempered steels · 133 grades
Designations 19

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If you came for one of these

The most-used names for this grade.

DIN / EN30CrMoV9This grade’s own name

About Quenched and tempered steels

Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required.

This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.

Also known as

19 designations · 9 standards · nothing hidden

This grade’s own namerecorded in our sources as this grade’s own designation under that standard.

Indicativetaken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering.

Withdrawndesignation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once.

DIN / ENEurope · 1

30CrMoV9This grade’s own name

UNSUnited States · 1

G43406Indicative

AISI / SAEUnited States · 2

ASTMUnited States · 2

SAE AMSUnited States / Aerospace · 5

GOSTRussia / CIS · 3

ČSNCzechia · 2

PNPoland · 2

SRPSSerbia · 1

Č.4734Indicative

Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.

Chemical composition

9 elements on file · weight %

What this alloy is

Iron — the balance, never listed by a standard — 95.2 %Cr — 2.5 %Ni — 0.6 %Mn — 0.6 %Traces & impurities · 1.1 %

Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.

Element	% by weight
	0.26–0.34
	≤ 0.4
	0.4–0.7
	0.035
	0.035
	2.3–2.7 —
	0.15–0.25
	0.6
	0.1–0.2

0.01 %0.1 %1 %10 %100 %

The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.

Element	As publishedsource text, verbatim	Min% by weight	Max% by weight	Bound
C	0,26-0,34	0.260	0.340	Range
Si	≤0,40	—	0.400	Max
P	0,035	0.035	0.035	Exact
S	0,035	0.035	0.035	Exact
V	0,10-0,20	0.100	0.200	Range
Cr	2,30-2,70	2.300	2.700	Range
Mn	0,40-0,70	0.400	0.700	Range
Ni	0,6	0.600	0.600	Exact
Mo	0,15-0,25	0.150	0.250	Range

The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.

Predicted transformation temperatures

computed from composition · °C

Predicted Ae3786°C

Predicted Ae1776°C

Predicted Acm610°C

Predicted Bs482°C

These four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either.

Physical & mechanical properties

Density7,73g/cm³Exact

Flake sensitivitysusceptibleAs published: predisposed

Temper brittlenesssusceptibleAs published: predisposed

An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.

Properties by condition

3 conditions · 10 values

By thicknessQuenched and temperedsource steelnumber

Thicknessmm	RmN/mm²	A%
≤ 160	900	12
160 – 330	800	14

By dimensionQuenching 870°C, oil, Drawing 620°C, watersource splav

Dimensionmm	RmN/mm²	ReN/mm²	A5%	Z%	KCUkJ/m²
Ø 25	980	835	12	55	980

By delivery stateno delivery state statedsource splav

Delivery state	HB
(annealing) , GOST 4543-71	229

Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ.

Looking for this grade under another name?

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